krishna bhagya jala nigam limited preliminary report for remodelling ...

KRISHNA BHAGYA JALA NIGAM LIMITED

PRELIMINARY REPORT FOR REMODELLING OF NARAYANPUR LEFT BANK CANAL AND ITS NETWORK

Estimated Cost – 3060 Crores

May - 2012

KRISHNA BHAGYA JALA NIGAM LIMITED

(A Government of Karnataka Undertaking)

PWD office Annexe, 3rd Floor, K R Circle,

Bangalore – 560 001

Krishna Bhagya Jala Nigam Limited Preliminary report on Remodeling of

NLBC Network under UKP

Contents

Chapter 1. General ...................................................................................................... 1

1.1. Engineering aspects: ............................................................................................................... 3

1.1.1. Remodelling of canal network under NLBC..................................................................... 3

1.1.2. Using Telemetry for proper measurements and data acquisition .................................... 3

1.1.3. Automation of Regulators ................................................................................................ 4

1.1.4. Land Reclamation ........................................................................................................... 4

1.2. Topography ............................................................................................................................. 5

1.3. General Climatic condition ...................................................................................................... 5

1.3.1. General ........................................................................................................................... 5

1.3.2. Rainfall ............................................................................................................................ 6

1.3.3. Temperature.................................................................................................................... 6

1.3.4. Humidity .......................................................................................................................... 6

1.3.5. Cloudiness ...................................................................................................................... 6

1.3.6. Wind ................................................................................................................................ 6

Chapter 2. Inter State Aspects ................................................................................... 8

2.1 States traversed by Krishna River ........................................................................................... 8

2.2 Interstate awards of Krishna Water Dispute Tribunal .............................................................. 8

Chapter 3. Survey and Soil Investigation .................................................................. 9

3.1 Background ............................................................................................................................. 9

3.2 Observations ........................................................................................................................... 9

Chapter 4. Hydrology ................................................................................................ 11

Chapter 5. Irrigation Planning .................................................................................. 14

5.1 Proposed cropping pattern as per original report .................................................................. 14

5.2 Crop Water Requirement ...................................................................................................... 15

Chapter 6. Planning for other intended benefits .................................................... 16

6.1 Flood control ......................................................................................................................... 16

6.2 Power .................................................................................................................................... 16

6.3 Drinking water and Industrial requirements ........................................................................... 16

Chapter 7. Cause and remedial measures .............................................................. 17

7.1 Engineering aspects: ............................................................................................................. 17

7.1.1 Diagnosis of the problems and analysis ........................................................................ 17

7.1.2 Defects in the design ..................................................................................................... 17

7.1.3 Defects in Construction ................................................................................................. 18



7.1.4 Defects in Operation and Maintenance ......................................................................... 18

7.1.5 Defects in Cross Drainage ............................................................................................ 19

7.1.6 Remedial measures ...................................................................................................... 19

7.2 Remodelling of canal network under NLBC .......................................................................... 19

7.2.1 Narayanpur Left Bank Canal ......................................................................................... 19

7.2.2 Land Reclamation ......................................................................................................... 25

7.3 Non Engineering Aspects ...................................................................................................... 25

a) Involvement of Beneficiaries in the management of the project for self-sustainability under NLBC .................................................................................................................................... 25

Chapter 8. Conclusion .............................................................................................. 27

Chapter 9. Construction Organisation .................................................................... 28

8.1 . Organization setup for Remodelling works .......................................................................... 28

Chapter 10. Cost ......................................................................................................... 33

8.1 Major repairs carried out ....................................................................................................... 33

8.2 Cost estimate ........................................................................................................................ 33

Chapter 11. Benefit Cost Ratio ................................................................................... 35

Annexure - 1 ................................................................................................................ 36

Details of Canal system under NLBC ............................................................................................... 36

Narayanapur Left Bank Canal .......................................................................................................... 36

Shahapur Branch canal .................................................................................................................... 38

Mudbal Branch canal ........................................................................................................................ 39

Jewargi Branch canal ....................................................................................................................... 40

Indi Branch canal .............................................................................................................................. 42

Annexure - 2 ................................................................................................................ 44



List of Figures

Figure 7.1:- Slope failure, damage to lining/leakage at structures of NLBC Conditions of Canals ............... 21 Fig 7.2 – At Ch: 40+325 Km ........................................................................................................................ 21 Fig 7.3 – At Ch: 41+470 Km ........................................................................................................................ 21 Fig 7.4 – At Ch: 42+700 Km ........................................................................................................................ 21 Fig 7.5 – At Ch: 47+500 Km ........................................................................................................................ 21 Fig 7.6 – At Ch: 46+300 Km ........................................................................................................................ 21 Fig 7.7 – At Ch: 51+460 Km ......................................................................................................................... 21 Fig 7.8 – At Ch: 53.120 Km ......................................................................................................................... 22 Fig 7.9 – At Ch: 53+360 Km ........................................................................................................................ 22 Fig 7.10 – At Ch: 65+490 Km ....................................................................................................................... 22 Fig 7.11 – At Ch: 66+800 Km ....................................................................................................................... 22 Fig 7.12 – At Ch: 17+100 Km ....................................................................................................................... 22 Figure 7.13 –Silted portion in distributaries/leakage in structures ................................................................ 23 Fig 9.1 – Organisation chart of O&M Zone, Narayanpur .............................................................................. 30 Fig 9.2 – Organisation Chart of KBJNL, Canal Zone No.2 Kembhavi .......................................................... 31

List of Tables

Table 4.1: Mean Hydro Metrological Data of Upper Krishna Project Region ................................................ 11

Table 5.1 – Proposed cropping pattern ........................................................................................................ 14

List of Drawings

Drawing 1.– Index map of Narayanapur Left Bank Canal network

Drawing 2.– Schematic diagram of Narayanapur Left Bank Canal network

List of Annexures

Annexure 1 – Tree plan of Narayanapur Left Bank Canal

Annexure 2 – Tree plan of Shahapur Branch Canal

Annexure 3 – Tree plan of Mudbal Branch Canal

Annexure 4 – Tree plan of Jewargi Branch Canal

Annexure 5– Tree plan of Indi Branch Canal

Annexure 6 – Tree plan of distributaries of Narayanapur Left Bank Canal including structures

Annexure 7 – Tree plan of distributaries of Shahapur Branch Canal including structures

Annexure 8 – Tree plan of distributaries of Mudbal Branch Canal including structures

Annexure 9 – Tree plan of distributaries of Jewargi Branch Canal including structures

Annexure 10– Tree plan of distributaries of Indi Branch Canal including structures



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Chapter 1. General

Narayanpur Dam is located on Krishna river near Bachihal and Siddapur village of Bijapur District .This

reservoir is catering to the irrigation needs of a very vast area of about 5.4 Lakh Ha. The reservoir is a

composite dam consisting of a masonry spillway in the centre and masonry non spillway and earthen

embankment at the flanks on Krishna River.

The reservoir supplies water to Narayanpur Left Bank canal, Narayanpur Right Bank canal, Rampur Lift

Irrigation Scheme and Marol Lift Irrigation scheme from Back waters. Among these, Narayanpur Left Bank

canal (NLBC) is the biggest and the main artery of canal network which is designed with a discharge of

10,000 cusecs to irrigate 4.50 Lakhs Ha. The network also includes Hunasagi Baranch Canal, Indi Branch

Canal, Jewargi Branch Canal, Mudbal Branch Canal, and Shahpur Branch Canal and Indi Lift Canal and

sub systems.

The command area under NLBC is not getting planned water and attaining optimum water use efficiency

due to the following reasons;

1. The canal system is not operating to its optimum condition due to seepages, slippages etc.

2. There is absence of proper rotation system and management of flow of water in the system as it

is not managed in a proper manner. There is lot of wastage noticed in the canal system.

3. The farmers are growing water intensive crops.

4. The crops are being grown in an unscientific manner which has also resulted in usage of excess

water.

5. The farmers have not been educated to adopt newer irrigation techniques involving Micro Irrigation.

6. There is no proper planning of utilisation of available water in the basin in an optimum manner. No

details are available regarding the ground water table and subsequent conjunctive use of both

surface and ground waters.

7. Absence of proper surface and subsurface drainage has resulted in water logging resulting in water

logging and subsequent salinity and alkalinity in the command.

Excess water is being utilized in the upstream reaches and absence of proper regulating arrangements in

the system has resulted in tail end reaches not getting enough water.



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Due to the excess water being fed in to the command than what is required, salinity and alkaline areas

have also formed. The details of areas affected by salinity and alkalinity in NLBC command is indicated

below:

No Name of canals ICA (Ha)

Area affected (Ha) Balance

area to be

reclaimed

(Ha)

Water

logged Salinity Alkalinity Total

1 2 3 4 5 6 7 8

1 NLBC 47,233 5338.00 488.00 168.00 5994.00 2620.00

2 Shahpur Branch Canal

1,22,120 7012.00 6080.00 3460.00 16552.00 13714.00

3 Mudbal Branch Canal

51,000 3724.00 1751.00 1481.00 6956.00 6311.00

4 Jewargi Branch Canal

57,100 5814.00 3404.00 2316.00 11534.00 10898.00

5 Indi Branch Canal

1,31,260 1927.00 1794.00 1346.00 5067.00 4037.00

Total 408703.00 23815.00 13517.00 8771.00 46103.00 37580.00

On account of deficit of water reaching the tail end, the command is suffering and the details are as under:

No. Name of Canal Utilisation

(in TMC)

Total ICA in

Ha.

Suffering atchkat (in

Ha.)

Talukas effected

1 Narayanpur Left Bank Canal

13.10 47,223 10,560 Shorapur

2 Shahapur Branch Canal

34.00 1,22,120 33,018 Shahapur & Jewargi

3 Mudbal Branch Canal 14.10 51,000 16,245 Shahapur & Jewargi

4 Indi Branch Canal 37.50 1,31,260 22,743 Shorapur, Jewargi, Sindagi &

Indi

5 Jewargi Branch Canal

15.80 57,100 23,057 Jewargi & Shahapur

Total 114.50 4,08,703 1,05,623

Due to slips and slope failures, failures of canal lining, increased operational losses due to leaks in gates

and structures, unattended control, etc. have resulted in reducing the designed capacity of the canals,

resulting in reduction of conveyance efficiency.



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Farmers have begun growing a wide range of crops requiring higher delta and water on demand resulting

in inequity in water distribution (Users at the Head and Tail end).This along with ageing has reduced end

use efficiency.

1.1. Engineering aspects:

1.1.1. Remodelling of canal network under NLBC

Narayanpur Left Bank Canal and its network are generally in poor condition. In several reaches, the canal

is lined with PCC slabs. It is noticed that the PCC slabs have sunk due to slips and failure of inner slopes.

The NLBC main canal is more than 35 years old.

It is observed that;

Cross sections as existing are not conforming to the designed cross sections.

Leakages through embankment have been noticed on downstream toe. The leakages if not

checked may increase over the years.

Unsatisfactory performance of lining.

The structures are in bad condition resulting in heavy leakages.

It is proposed to take up the remodeling of Narayanpur Left Bank Canal and its canal network as part of the

objective of improving water use efficiency.

Remodeling activity planned tries to address the following aspects:

Rectify design defects if any in the canal system and structures there on.

Restore design canal parameters by remodelling wherever necessary and carrying out repair

works.

Strengthen the embankments ensuring no slips and bank failures and effectiveness of lining.

1.1.2. Using Telemetry for proper measurements and data acquisition

For the success of any project to achieve equitable distribution of water to the users, it is necessary to have

a proper measurement and controlling system in place. Currently, Telemetry is proposed to be introduced

to have proper measurements of water flows in the canal system and subsequent data acquisition to have

an idea about the performance of the canal system on a real time basis.

NLBC, which is quite old, does not possess reliable conventional method of measurement system to

ensure proper and equitable distribution of water.



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It is now proposed to use Telemetry as part of improving the conveyance efficiency in the NLBC canal

system. Telemetry, as such, gives the volumetric measurements of water flow in canal at various reaches.

This will also help in assessing the amount of seepage, excess drawals, unauthorized drawals etc.

Government of Karnataka has already taken up usage of Telemetry in Ghataprabha Left Bank Canal and

the results have shown substantial improvement in the water use efficiency.

Implementation of Telemetry in the NLBC canal system will help in reducing human intervention to a large

extent and will help in getting facts real time facts enabling proper analysis, thereby achieving better

management of the available water. The telemetry will also be supported by a communication layer for

transfer of data.

1.1.3. Automation of Regulators

The existing regulators in the NLBC are manually controlled and are not working to its optimum capacity.

Many of the distributary regulators are not properly maintained and as a result few farmers are drawing

excess water than what is necessary in the upper reaches there by depriving the tail end users of their

share. The manual operation of regulators has proved to be a weak link in the O&M as the manpower is

inadequate with significant lag in response time and no proper feedback.

This is also one of the factors for reduction in Conveyance efficiency. The excess water being drawn, in

absence of proper drainage system has further resulted in many areas being affected by salinity and

Alkalinity.

It is hence proposed to bring in automation in the NLBC canal system up to lateral level which will help in

addressing all the above factors affecting the equitable distribution of water and result in increase in the

conveyance efficiency.

1.1.4. Land Reclamation

It is generally the practice of a farmer to give more water to the crop than what is required. In NLBC, the

same pattern is being followed by the farmers in the upper reaches of the canal. In addition to this, there is

no proper surface / subsurface drainage in the area. This combined with unscientific cultivation practice has

resulted in about 25% of the tail end command suffering for want of water with reduction in end use

efficiency. Large area in the command has also become saline due to water logging.

In NLBC, about 37000 Ha has been affected by salinity. It is now proposed to reclaim the affected areas by

providing proper surface / sub surface drainage system in the command. This along with educating farmers

about adopting scientific cultivation, regulatory measures, and using water effectively / optimally will help in

achieving the end result of reclamation along with increase in water use efficiency.



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1.2. Topography

Krishna river basin is 2,58,948 Sq. Km of which drainage area in Karnataka is 1,13,272 Sq Km, which is

about 43.74 % of the basin area.

Main tributaries of river Krishna in Karnataka are Bhima and Don from the north, Ghataprabha,

Malaprabha, Tungabhadra, Hagari and Vedavathi from the south.

Description of these tributaries of Krishna River in brief is furnished below in a tabular form.

No. Name of the

tributary

Catchmen

t area in

Sq. miles

Origin Altitude Length Sub-tributaries Name of the

state

1 Ghataprabha 3,409 Western Ghats

2900 176 Hiranyakeshi, Markandeya

Maharashtra, Karnataka

2 Malaprabha 4,459 Western Ghats

2600 190 Bennihalla, Hirehalla, Tas nadi

Karnataka

3 Bhima 27,264 Western Ghats

3100 535 Combined waters of Mula and Mutha Ghod, Nira, Sina

Maharashtra, Karnataka

4 Tungabhadra 27,574 Western Ghats at

Gangamula 3930 330

Combined waters of Tunga and Bhadra,

Varada, Hagari (Vedavathy)

Karnataka, Andhra Pradesh

The river basin is in arid zone and is largely sustained by rainfall in Western Ghats through Southwest

monsoon. The head reaches of the catchment area lie in Western Ghats where the average rainfall is heavy

The region experiences an average rainfall of 684.17 mm . The river is completely rain-fed. The river,

gradually begins to rise in June, picks up in July, and in floods during the months of August and

September. The flow of water in the river rises to height of about 3m in rainy season and again

gradually declines in the month of October and by February, the river will be almost dry.

1.3. General Climatic condition

1.3.1. General

The climate of the region is generally dry. The larger variations in rainfall from year to year both in quantity

and distribution through the season render the region to drought and famine. The hot season begins by

middle of February and extends upto the end of May or beginning of June followed by Southwest monsoon

season extending upto the end of September when the weather is cool and damp. The Northeast or the

retreating monsoon season is the period from October to November, while the cold season is from



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December to the middle of February. As per Koppen's classification, the regional climate is hot, semi-arid,

and tropical.

1.3.2. Rainfall

The project region experiences an average annual rainfall of 684.17 mm. Though the total rainfall is not

high, the area benefits both from the Southwest and Northeast monsoons. The Southwest monsoon

reaches the region by about first week of June. There is a steep rise in Southwest monsoons during the

months of September, October and November which brings in, the Northeast monsoon rains. The rains

fail in some years.

1.3.3. Temperature

December is the coldest month of the year when the temperature is 15.72° Temperature begins to rise

rapidly from the latter half of February. The maximum temperature attains the highest value of about 40°-

42° C in the month of May. With the onset of Monsoon, weather becomes cooler. The intensity of summer

heat is occasionally relieved by Thunderstorms in the afternoon.

1.3.4. Humidity

The region on the whole enjoys a dry climate. The months from December to May are the driest. The

average relative humidity in the afternoons is 30% and as low as 10% in individual days. Even during the

Monsoon months, the average humidity is appreciably below the saturation level.

1.3.5. Cloudiness

Skies are generally clear or lightly clouded during the months of December to March. Cloudiness begins to

increase progressively from April and during monsoon months the skies are heavily clouded on most of the

days.

1.3.6. Wind

Most parts of the area are exposed to strong winds almost throughout the year. By the end of October, fairly

constant wind, which gets cooler with the progress of the season, sets in from the Northeast. From

November to January, dry and biting winds blow from direction between northeast and southwest. In

February, northerly and northwesterly winds are also common in the forenoon and these become more and

more predominant in the months of March and April. The afternoon winds are variable in all these three

months. With the advance of summer, dust-raising winds add to the discomfort of the hot weather. During



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the second half of May, winds increase in force and blow from directions between Southwest and Northwest.

Although they do not bring rain, these winds are cool and refreshing. With the onset of monsoons, winds

strengthen further and blow from directions West and Southwest. By the latter half of September winds

begin to weaken and blow from directions between North and East.



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Chapter 2. Inter State Aspects

2.1 States traversed by Krishna River

Krishna River is an Inter-State river in Southern India. It is the second largest river in Peninsular India.

Krishna flows across the whole width of the peninsula, from west to east, for a length of about 1,392 Km

(870 miles) through Maharashtra, Karnataka and Andhra Pradesh.

The river Krishna enters Karnataka at its 304th Km and passes through the state for a length of 480 Km

before existing at 78th Km.

The total catchment area of Krishna basin is 2, 58,948 Sq. Km and the distribution of the same in the three

states is indicated below

No. Name of the basin state Catchment area

in (Sq. Km)

1 Maharashtra 69,425

2 Karnataka 1,13,271

3 Andhra Pradesh 76,252

Total 2,58,948

Source: Water Atlas of India

2.2 Interstate awards of Krishna Water Dispute Tribunal

Krishna water disputes tribunal (KWDT-I) which was setup to allocate the waters of Krishna river among the

riparian states of Maharashtra, Karnataka and Andhra Pradesh in its award of No. 18 (1)/76-KWDT dated

27th May 1976, has identified the 75% dependable yield in river Krishna as 2060 TMC and has awarded the

share of waters to the three riparian states as under

State

Share in Excess over 2060 to

2130 in (%) 75% dependable flow

(TMC)

Regeneration flow

(TMC) Maharashtra 560 25 35 Karnataka 700 34 50

Andhra Pradesh 800 11 15

Total 2060 70



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Chapter 3. Survey and Soil Investigation

3.1 Background

Based on the request of M/s KBJNL, M/s Indian Institute of Science (IISc) had carried out the Soil survey and

investigations of the stability of Narayanapur left bank canal vide CP2910/0504/97 in 1997. In 2010, M/S

KBJNL has approached (ref: KBJNL/CENZ/N.PUR/PB-3/2010-2011/450) M/s IISc again for conducting

stability analysis for high embankment reaches of Narayanapur Left Bank Canal in Upper Krishna Project

(UKP). Following this, an agreement was signed by M/s KBJNL with Prof T G Sitharam as consultant with the

following scope of work (Ref: CP 6386/0505/10 Dated 27th July 2010):

1. Examination of failed cross sections - Site visit for inspection of distress/slips occurred reaches

2. Laboratory testing of soil samples collected and sent by M/s KBJNL

3. Selection of parameters for the slope stability analyses of failed /distressed high embankment

reaches

4. Stability analyses of all the failed / distressed slopes of high embankment reaches of NLBC

5. Recommendations and remedial measures

Subsequently, IISc team consisting of Prof. T.G. Sitharam and Prof. K.S. Subba Rao made a site

visit on 28th and 29th June 2010 for inspection of distress / slips occurred reaches of the canal.

The following documents have been submitted by M/s KBJNL.

1. Soil samples collected on NLBC on 1-7-2010 (seven bags of representative soil samples with two

bags from identified quarries from Yalagi and Srinivaspura areas)

2. Report on investigating stability of Narayanpur Left Bank Canal test results

3. Details of slip occurred on NLBC prepared by office of the Executive Engineer, NLBC division,

Hunasagi

4. Brief Note on failures occurred on Narayanpur Left bank canal prepared by office of the Executive

Engineer, NLBC division, Hunasagi

5. Observed cross sections of the failed slopes.

3.2 Observations

During the site visit, canal was closed for the off-season and it was reported that since April 15th 2010, the

canal is closed. At some locations, repair and restoration works particularly in the reaches of canal between

40km to 70km chainages were in progress. The material used for embankment construction is very poor at

many locations and in some stretches, even black cotton soil has been used as Casing material. In the

reaches of canal between 40km to 70km chainages, chair formations of PC slabs, caving with complete loss

of support for the lining are the major problems encountered. Large slips have occurred mainly on IP side



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slope of the canal and some slips and caving have occurred with complete loss of support for the lining on

SR side. In some reaches, slips have occurred in the black cotton soil regions particularly in the embankment

portion. Table 1 lists the soil samples collected from selected chainages in the slipped reaches of NLBC. The

Atterberg limits such as liquid limits and plastic limits were evaluated for these samples (samples were

supplied by Ms/ KBJNL). At chainages 52.6 km and 53.1 km , Atterberg limits are in the range of properties

which are generally obtained for expansive soils, indicating clearly that the expansive soil itself has been

used as the casing material for construction.

The canal has been designed for 10,000 cusecs and has been constructed some 30years ago. Water was

first allowed for irrigation in 1983. Repeated filling and drawdown over many years coupled with lack of

regular maintenance like resetting and pointing of slabs has been one of the main reasons for the slips. The

chair formations of PCC slabs are primarily due to soil being expansive and not properly covered with CNS

materials. Adequate compaction of soil immediately behind the lining is highly suspect. Even during our visit,

we observed that compaction was not being carried out to extra widths so that after compaction the slope

can be trimmed to the slope designed profile, such un-compacted material will result in piping and cavity

formation. In the entire stretches of NLBC, collected debris was seen in the canal bed at many locations.

Except at two locations (Chainage 1.1km and 13.3km) no seepage on the downstream (rear) slopes were

observed clearly indicating that hearting provided in the canal section is performing well. The reported

leakages at Chainage 1.1km and 13.3km by the officials of M/s KBJNL is may be due to other reasons such

as cavities formed due to washing of lime stone base below the level of canal beds. At some places it was

very clear that good bonding has not been provided between hearting material and casing material. The poor

quality borrow material used for construction and the quality of compaction during construction are attributed

to the cause of the major slips observed in the embankment section of NLBC. Slips have generally occurred

during sudden drawdown conditions and at more than 27stretches these failures have occurred in the last

one year. At chainages 63.36 Km (Chainage on IP Side) materials at the bottom and behind the lining were

sudde soils. Even for these soils, liquid limit was 42%, plastic limit was18% and Ip was 24 % having a fine

grained (silt + clay) fraction more ranging from 60 to80%. The photos 26 and 27 clearly indicate a very soft

nature of soil with large amount of water content. The distress mentioned above between the chainages 0 to

40 kms were not as serious as that of slips, seepages and the bed damages between the chainages 40 to

70kms. Major problems encountered in the initial reaches 0 to 40 kms were reported to be::

1. Leakages through the embankment on to the downstream toe, these leakages are meagre. However

there is a possibility that it may increase over the years.

2. Unsatisfactory performance of the lining at many places.

3. Accumulation of debris on the bed of the canal at many reaches.

Krishna Bhagya Jala Nigam Limited Preliminary report on Remodeling of NLBC Network under UKP

Page 11

Chapter 4. Hydrology

Table 4.1: Mean Hydro Metrological Data of Upper Krishna Project Region

Month Temperature °C Cloud

Cover Sunshine

Hours Humidity

(%)

Wind Speed km/day

Evp (mm)

Average Rainfall (45 years) From 1960-61 to 2005-06 Weighted Average

Rainfall (mm) Gulbarga (mm)

Bijapur (mm)

Raichur (mm)

Average (mm) Max Min Avg

Jan 29.94 16.17 23.055 1.90 10.80 44 158.40 189.01 1.30 3.30 0.80 1.80 2.0

Feb 33.13 18.11 25.62 1.68 11.00 37 163.20 199.16 5.20 1.20 6.00 4.13 4.0

Mar 36.13 20.39 28.26 1.80 10.80 34 172.80 243.17 11.20 9.40 4.10 8.23 9.0

Apr 30.43 24.51 27.47 2.98 9.70 37 186.00 264.09 16.80 25.80 12.70 18.43 18.0

May 39.60 25.38 32.49 3.95 8.60 42 248.40 278.05 39.90 39.40 28.40 15.90 36.0

Jun 34.37 23.28 28.825 5.63 6.70 62 337.20 234.41 110.20 67.70 102.90 93.60 98.0

Jul 31.13 22.28 26.705 6.63 5.30 71 355.20 201.62 158.80 78.90 138.60 125.43 130.0

Aug 31.37 21.91 26.64 6.18 6.00 69 301.20 192.66 142.90 84.80 135.00 120.90 127.0

Sep 31.23 21.72 26.475 5.77 6.50 69 224.40 175.22 178.30 135.40 167.50 160.40 165.0

Oct 31.53 21.11 26.32 4.30 8.30 59 175.20 178.30 71.00 97.40 93.90 87.43 84.0

Nov 29.83 17.74 23.785 3.35 9.30 50 176.40 168.71 23.80 25.90 24.80 24.83 25.0

Dec 29.01 15.72 22.365 2.37 10.30 46 163.20 166.77 1.90 4.70 2.60 3.07 3.0

Total 2,493.37 761.30 573.90 717.30 684.17 701.0

Source: Upper Krishna Stage II DPR. Sep 2000 - KBJNL



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Page 13



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Chapter 5. Irrigation Planning

5.1 Proposed cropping pattern as per original report

The following crops are proposed.

Table 5.1 – Proposed cropping pattern

Crop Area (%age)

I. KHARIF CROPS

Paddy 2.50

Hy.Jowar 15.00

Ground nut 15.00

Maize(Hybrid) 15.00

II RABI CROPS

Jowar 12.50

Wheat 8.00

Sunflower 2.50

Gram 2.50

III BI SEASONAL

Cotton 15.00

Hy. Jawar & Ratton 2.50

Chilies & vegetables 5.00

Bajra & Pigeonpea 12.50

TOTAL 108.00



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5.2 Crop Water Requirement

The Irrigation Intensity considered was 108% for the Crop water requirement calculation to this canal. As

such, B C Ratio has been worked out considering the same Irrigation Intensity.

The canal section is proposed to be retained as per original design as such , the crops grown in the area and

crop water requirement remains unchanged. Hence crop water requirement calculations are retained as per

orginal and not appended with this report.



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Chapter 6. Planning for other intended benefits

6.1 Flood control

No flood control measures are envisaged

6.2 Power

No power generation is envisaged

6.3 Drinking water and Industrial requirements

Drinking water needs and industrial requirements has already been catered to in the original Upper Krishna

Project Report.



Page 17

Chapter 7. Cause and remedial measures

The causes for the said canal system having failed to deliver the required quantum of water to the tail end

have been analyzed considering Engineering aspects which is detailed below.

7.1 Engineering aspects:

7.1.1 Diagnosis of the problems and analysis

The success of any project in ensuring net savings in the total allocated or available water depends on the

adequacy of the canal to carry the designed or envisaged discharge. As a part of this, it is essential to make

a diagnostic analysis of the entire length of canal regarding its adequacy to carry the required discharge of

water. During the study, if the canal is found to be not adequate enough to carry the same due to various

defects, then it becomes necessary to address the same for setting them right.

These defects could be:

a. Defects occurring due to continuous usage and siltation which has resulted in the canal losing its

shape.

b. Defects due human activities i.e., breaking of gates, bank cutting etc.

c. Defects in operation and maintenance due to insufficient grants for O & M activities.

d. Defects due to non availability of proper information during the time of design and construction.

e. Any other defects which are hampering the discharge carrying capacity of the canal

These defects will be identified including socio-economic aspects and addressed with suggested necessary

remedial measures

7.1.2 Defects in the design

The design norms that have been adopted for the entire NLBC canal section will be verified and compared

with the existing.

For instance; if the canal has been designed, with a Rugosity coefficient of 0.018 and for certain site

constraints and reasons, `N’ is not realized in the canal section, then it becomes necessary to set right the

anomaly.



Page 18

This will have a great impact on the discharge carrying capacity of the canal. All such sections will be

identified.

To realize this, suitable discharge measurements will be taken along the entire section of the canal at several

strategic locations.

On collection of the data and identifying the defects, the nature of remedial measures shall be framed and

suggested.

Similarly, if there are issues related to the other canal parameters, they will also be verified on similar lines

and remedial measures will be framed.

7.1.3 Defects in Construction

The success of discharge carrying capacity of the canal not only lies with the canal section but also with the

related appurtenant structures which have been constructed as an integral part of the conveyance and

distribution system.

Hence, it is of a paramount importance that structural adequacy for carrying the design discharge by all the

cross drainage structures along the Narayanpur Left Bank Canal (NLBC) including high embankments will be

assessed.

Any major defects or engineering deficiencies that have been noticed will be identified, remedial measures

will be suggested.

It has been reported that the Narayanpur Left Bank Canal (NLBC) runs in an area having black cotton soil

and shale besides running in high embankment. When the canal is running at its full capacity, the canal

banks have breached at times.

By addressing the above issues and remodelling the canal system a savings of 19.72 TMC is envisaged.

7.1.4 Defects in Operation and Maintenance

The following defects have been noticed in operation and maintenance of NLBC when compared to standard

engineering practices being adopted:

1. Non-performance of gates and regulators

2. Absence of Warabandi system

3. Uncontrolled flooding of atchkat due to non-functioning of regulatory and measuring equipments.



Page 19

4. Adoption of unscientific methods by the farmers for growing crops.

5. Absence of proper training programmes for farmers.

KBJNL has been taking necessary remedial measures as a short time proposition.

As a part of this assignment, a long term remedial measure is being planned to address all the above

defects.

Introducing Telemetry and Automation of regulators results in better operation and water management, a

savings of 9.87 TMC is envisaged.

This will ensure that the required or design discharge shall be carried by the canal.

7.1.5 Defects in Cross Drainage

The preliminary assessment has also confirmed that poor drainage conditions along the Narayanpur Left

Bank Canal (NLBC) especially in sections where the canal runs in embankment is one of the reasons for the

breach of the canal.

Water logging of the adjoining area leading to salinity has been noticed due to poor drainage system in the

command area.

Providing adequate drainage at certain sections including longitudinal drains where it is necessary to ensure

the safe leading of the excess water to the valleys to drain it away from the canal will be a part of this

assignment.

7.1.6 Remedial measures

The remedial measures which are proposed to be adopted in NLBC to achieve the objectives including

attending to Engineering aspects are as under:

The details of activities under each aspect are briefly explained in ensuing chapters.

7.2 Remodelling of canal network under NLBC

The details of the present condition of NLBC and its branch canals are detailed as under.

7.2.1 Narayanpur Left Bank Canal

Narayanpur Left Bank Canal is generally in bad condition. However, water is being let into the canal for

irrigation. The reconnaissance survey reveals that in some reaches, the canal is lined with PCC slabs.



Page 20

However, it is noticed that in several reaches, the PCC slabs have sunken due to slips, scour of embankment

and failure of inner slopes.

Year wise chart showing number of slips occurred in the reach between Km 41 to 73 is as follows;

Year No. of slips Year No. of slips

1990 02 2001 --

1991 03 2002 05

1992 -- 2003 05

1993 02 2004 02

1994 06 2005 --

1995 02 2006 03

1996 07 2007 08

1997 04 2008 03

1998 04 2009 06

1999 17 2010 15

2000 -- 2011 11

These slipped portions were restored by resetting the existing PCC slabs / by replacing with C.C. lining over

compacted back filling. As the problem continued to exist, an expert committee was setup by the Govt. to

suggest proper remedial measures. Professors from Indian Institute of Science, Bangalore visited the site

during February 1997, August 1997, October 2001, four visits during 2002 and again during June 2010.

Slope failures / slips have become a routine affair and annually as a routine maintenance slips were being

restored during closure period of the canal. As per the observations of IISc, during 2010, the restoration

works are being undertaken under this proposal.

The observations made by Indian Institute of Science on the failure zones of NLBC in these reaches have

revealed that the soil behind the lining is fully saturated. The soil layers close to the lining have either slaked

or close to slaking. Besides, the material used for casing has been a wrong choice. The real cause of failure

of embankment was the alternate volume changes that take place due swelling / shrinkage during stoppage

of water. A detailed hydraulic survey of NLBC has been carried out. Longitudinal and cross-sections of the

canal are plotted indicating the existing levels.

It is observed that;

Cross sections as existing are not conforming to the design cross sections and canal networks.

Leakages through embankment were noticed on downstream toe (at two locations corresponding to

Chainage 1.10 Km and 13.30 Km of NLBC). Leakages noticed were meager. However, there is a

possibility that it may increase over the years.

Unsatisfactory performance of existing lining.



Page 21

Figure 7.1:- Slope failure, damage to lining/leakage at structures of NLBC Conditions of Canals

Fig 7.2 – At Ch: 40+325 Km Fig 7.3 – At Ch: 41+470 Km





Page 22

Fig 7.8 – At Ch: 53.120 Km Fig 7.9 – At Ch: 53+360 Km


Fig 7.12 – At Ch: 17+100 Km



Page 23

The distributary networks in certain reaches of NLBC have been heavily silted up and flattered over the years

leading to non supply of sufficient discharge to reach the tail end of command. Structures are also in bad

conditions leading to leakages and wastage of water requires Restoration.

Figure 7.13 –Silted portion in distributaries/leakage in structures

Shahapur Branch canal

The canal slope at certain reaches is eroded due to swelling pressure of the soil, which has led to dilapidated

condition. In some reaches, the canal has reached its regime section. It is also noticed that in some reaches

lining has worn out leading to seepage.



Page 24

Mudbal Branch canal

The CC lining in the main canal and distributaries is damaged at various reaches due to slips/scour of

embankment occurring on account of swelling of soil. It is also noticed that structures are in bad condition

leading to leakage.

Jewargi Branch canal

The soil strata observed in the canal reach is mainly BC soil and Shale. The CC lining in the main canal and

distributaries is damaged at various reaches due to slips occurring on account of swelling of soil. It is also

noticed that structures are in bad condition leading to leakage.

Indi Branch canal

The Indi Branch Canal has a total length of 173 Km. The reach from 0.0 Km to 64.0 Km has been

constructed initially and is old. The reach from 65.0 Km to 173.0 Km has been constructed recently and is in

good condition. The present proposal is to attend to the defects noticed in the reach from 0.0 Km to 64.0 Km.

The condition of the main canal and distributary network has deteriorated due to continuous flow of water for

irrigation. Due to the sudden draw down condition in the canal, slippage of C.C. lining both in cutting/ banking

reaches, cutting /partial cutting, partial banking and full banking reaches have occurred. The damages have

been identified mainly in Km 0.00 to 10.00 ( details enclosed ) & Km 20.00 to 64.00 etc., The damages

include slippage of CC lining , scouring on inner side of embankment & rain cuts on the outer casing of the

canal.

As per the recommendations of the IISc, some remedial works were executed in few slipped reaches and

they are in stable condition.

Activities proposed for taking up remodeling of the NLBC canal network as per recommendations of the IISc,

Bangalore.

Dismantling of existing P.C.C slabs / Masonry / C.C lining including cross walls, Toe walls etc.

Removal of slipped material, existing casing material such as shale, B.C. soil, and sudda soil, other

inferior quality material existing below lining up to a depth of 1 mtr for sides and to a specified depth

in bed portion.



Page 25

Providing CNS layer of 1.00 m for sides and bed to the desired density using vibratory roller and

using main-earth compactor near structures.

Providing Paver C.C. lining with paver machines using M-15 grade concrete with 0.2% steel both

ways for the full canal cross section covering (FSD + FB) with 1 mtr wide anchorage.

Providing RCC toe wall to the required depth to integrate with RCC lining, pressure relief valves,

Tarfelt expansion joints, providing filter media wherever required, formation of service road,

Inspection path and dowel bunds etc.,

At the location of structures, restoration works such as grouting, construction of cut off walls, joint

filler materials etc shall be a part of remodelling.

At all locations of MCPC, additional RCC bed concrete shall be provided on either side of MCPC for

a width of 2.00 Mtrs depending upon the permissible bed levels to prevent and reduce leakages in

the existing MCPC’s as per present site conditions.

7.2.2 Land Reclamation

It is generally the practice of a farmer to give more water to the crop than what is required. In NLBC, the

same pattern is being followed by the farmers in the upper reaches of the canal. Further to this, there is no

proper surface / subsurface drainage in the area. This combined with unscientific cultivation practice has

resulted in about 25% of the tail end command suffering for want of water with reduction in end use

efficiency. Large area in the command has also become saline due to water logging.

In NLBC, about 37000 Ha has been affected by salinity. It is now proposed to reclaim the affected areas by

providing proper surface / sub surface drainage system in the command. This along with educating farmers

about adopting scientific cultivation, regulatory measures, and using water effectively / optimally will help in

achieving the end result of reclamation along with increase in water use efficiency.

7.3 Non Engineering Aspects

a) Involvement of Beneficiaries in the management of the project for self-sustainability under NLBC

In order to manage equitable distribution of water, control of excess water being utilised, control of the

discharge of water and promote scientific method of crop cultivation, in NLBC it is proposed to involve

beneficiaries in the management of water. This aspect was considered in the original report also and WUCS

have been formed so far, thus requiring the balance 315 WUCS to be formed immediately.



Page 26

The existing WUCS are not functioning to its optimum due to the following reasons:

Water User’s Cooperative societies, even though in existence could not participate in water

management due to the fact that there was no provision for participation of users in the original

Karnataka Irrigation act.

Further the Govt, .in its order during 1999, has notified that the right for specific supply of water is to

be entrusted to the societies. However, the agreements entered in to by the Executive Engineers

with the societies did not specify the quantum water to be supplied, season wise and as such could

not be implemented in an effective manner

Absence of proper capacity building of WUCS.

Absence of proper training to farmers.

There is a necessity to supply water on volumetric basis as per time-bound programme by sharing the

responsibility of water management. The Command Area Development Authorities have taken the

responsibilities to identify the water users, form a society, register the society and to train the office bearers

and farmers.

The KBJNL and CADA are striving to strengthen the WUCS’s by implementing Participatory Irrigation

Management Programme (Water Management and other programmes).

In the present proposal, it has been decided to revive the existing defunct WUCS in addition to formation of

new ones as per requirement. The formation of WUCS includes one time repair works and suitable training

for the farmers and officials involved in the management of the canal system.

The formation of WUCS includes a one time repair grant of about Rs.5.00 lakhs which is going to be paid.

Generally, the time repair grant is for the works like; removal of silt and jungle, minor repairs to CD works,

proper formation and SR & IP etc. so that flow of water in the canal network is ensured. Apart from one time

repair works, training programmes are necessary to the farmers and officials like Secretaries, Presidents,

Directors, Members etc. of the WUCS.

The probable cost of one time repair including training etc cost to Rs 38.00 Crores



Page 27

Chapter 8. Conclusion

The details of water proposed to be saved are as under.

Sl. Remedy Savings in TMC

1 Due to remodeling of canals and other engineering aspects 19.72

2 Due to improved operations and maintenance by introduction of SCADA

Telemetry and Automation of Gates

9.87

Total savings 29.59

By adopting modernization / remodeling of existing canal system and by improving operation and water

management by introducing telemetry, automation of regulators and optimum use of water by educating

farmers. It is envisaged to save approximately 29.59 TMC of water which will suffice for irrigating suffering

achkat of 1,05,623 Ha. in the tail end which are at present deprived of full benefits of irrigation.



Page 28

Chapter 9. Construction Organisation

8.1 . Organization setup for Remodelling works



Page 29



Page 30

Fig 9.1 – Organisation chart of O&M Zone, Narayanpur



Page 31

Fig 9.2 – Organisation Chart of KBJNL, Canal Zone No.2 Kembhavi



Page 32



Page 33

Chapter 10. Cost

8.1 Major repairs carried out

No major repairs have been taken up in the last 3 years as on 31/3/2012 in the canals and its distributaries.

Now, proposal is made under the ERM package as follows.

8.2 Cost estimate

The financial expenditure towards various activities is based on the line estimates as per the prevailing

schedule of rates.

No. Particulars Amount in

Crores

I. Engineering aspects

1 Remodeling of Canal Network

i Remodelling of Narayanapur Left Bank Canal and its Distributary Network 1100.05

ii Remodelling of Shahapur Branch Canal and its Distributary Network 545.59

iii Remodelling of Jewargi Branch Canal and its Distributary Network 293.28

iv Remodelling of Mudbal Branch Canal and its Distributary Network 235.60

v Remodelling of Indi Branch Canal and its Distributary Network 740.48

2 Introduction of Telemetry for proper measurement 17.5

3 Automation of regulators for equitable distribution of water 30

4 Reclamation of soil in saline and water logged area in Command by providing surface/sub surface drainage system

59.5

II. Non Engineering aspects

1 Cost towards formation of WUCS, renewal of existing WUCS and other works

38

Total I 3060



Page 34

Cost

The total financial expenditure towards various activities indicated above will be about

Rs. 3060 Crores. This will include the following:

Remodelling of NLBC and its distribution network.

Remodelling of Shahapur branch canal and its distribution network.

Remodelling of Jewargi branch canal and its distribution network.

Remodelling of Mudbal branch canal and its distribution network.

Remodelling of Indi branch canal and its distribution network.

Introduction of Telemetry for proper measurement

Automation of regulators for equitable distribution of water

Land reclamation

Formation of nee WUCS, revival of existing WUCS.



Page 35

Chapter 11. Benefit Cost Ratio

The total cost for remodelling works in NLBC network under UKP works out to Rs.3060.00 Crores.

In the NLBC network, it is proposed to utilize the savings in water achieved on account of remodelling by

bringing the suffering atchkat and the saline affected areas under irrigation.

The total area considered for working out B C Ratio is .4, 08,703 Ha in the command. For the purpose of

calculation of B C Ratio, the parameter for gross value of farm production has been considered as before

irrigation.

The cost is based on the line estimates prepared as per SR of WRD 2011-12.

The benefit Cost ratio on account of implementation of the above scheme works out to 1.81

Hence this proposal is economically viable.

Details are enclosed in Annexure – II

Managing Director, Krishna Bhagya Jala Nigam Limited,

Bangalore



Page 36

Annexure - 1

Details of Canal system under NLBC

Details consisting of Hydraulic particulars, Geographical locations, present condition including relevant

photographs are indicated here under:

Narayanapur Left Bank Canal

No Particulars Details

1 Location

Latitude 16°10' N

Longitude 76°21' E

2 Offtake From Narayanapur Dam left flank

3 No of distributaries 1 Branch canal and 24 distributaries

4 Major Branch canals under NLBC

1. Shahapur Branch Canal

2. Indi Branch Canal

3. Jewargi Branch Canal

4. Mudbal Branch Canal

5. Indi Lift canal

5 Length (Km) 77.52

6 No of Structures

Head Regulators 31

Cross Regulators/ Escape 09

Aqueducts 01

Tunnel 02

Culverts 48

Super passage 02

Syphons 06

Bridges 30

7 Length of Distribution Network(Km)

718.00

8 Command area (Ha) 47,223

9 Water Utilization (TMC) 13.10

10 District/Taluks benefitted Yadgir / Shorapur



Page 37


11 Hydraulic particulars Km 0.00 – Km 35.50 Km 35.50 – Km 77.52

a Bed width in m

0.5:1 24.00 0.5:1 22.50

1:1 21.50 1:1 19.50

1.5:1 19.00 1.5:1 17.50

2:1 16.50 2:1 15.00

b Full supply depth 6.10 m 6.10 m

c Free Board 1.2 m 1.2/0.9 m

d Bed fall 1 in 7400 1 in 7400

e Canal inner slope 2:1 in banks 1 ½ :1 to ½ :1 in cutting reaches

2:1 in banks 1 ½ :1 to ½ :1 in cutting reaches

f Side lining in cutting reaches UCRS masonry Concrete lining

g Side lining in embankment reaches

PCC lining PCC lining

h Outer slope of embankment reaches

1 1/2:1 1 1/2:1

i Top width of bank on SR side 6.10 m 8.25 m

j Top width of bank on IP side 3.05 m 6.25 m

k Tunnel Reach -

Rajankollur Tunnel from 35.580 Km to 39.840 Km

Gundlageri Tunnel from 54.450 Km to 55.890 Km

Change in FSD From reach 73.920 Km to 76.110 Km – 5.62 m

From reach 76.110 Km to 77.520 Km – 4.57 m



Page 38

Shahapur Branch canal


1 Location

Latitude 16°39'46” N

Longitude 76°32' 10” E

2 Offtake At Km 76.11 of .Narayanapur Left Bank Canal

3 No of distributaries 32 no’s

4 Length (Km) 76.00

5 No of Structures

CD works 50

Bridges 33

Cross regulators 2

Head regulators 27

6 Length of Distribution Network(Km) 1126.89

7 Command area (Ha) 1,22,120


9 District/Taluks benefitted Gulbarga/ Jewargi

Yadgir/ Shahapur

10 Hydraulic particulars At offtake

a Bed width in m 6.10

b Full supply depth 4.60

c Free Board 0.9

d Bed fall 1:6400


f Side lining in cutting reaches CC

g Side lining in embankment reaches CC

h Outer slope of embankment reaches 1.5:1

i Top width of bank on SR side 6.1

j Top width of bank on IP side 3.05



Page 39

Mudbal Branch canal


1 Location



2 Offtake At Km 28.63 of .Shahapur Branch Canal


4 Length (Km) 50.80

5 No of Structures

CD works 32

Bridges 23

Cross regulators 2

Head regulators 22





Yadgir/ Shahapur




c Free Board 0.75

d Bed fall 1:6400









Page 40

Jewargi Branch canal

The Jewargi branch canal takes off at 77.52km of NLBC near Kembhavi village. The total length of canal is

86.36km having an ICA of 57089 hectare irrigating through 18 distributaries. The Command area mainly

comes in Shorapur taluka of Yadgir district and Jewargi taluka of Gulbarga district. The head discharge of

canal is 36.32 cumecs.

JBC main canal 0.00 to 40.00kms and distributaries 1 to 8, 7A,12C,12D,D-13 & D-14 are under the

jurisdiction of JBC division no-2 Bheemarayanagudi. There is a total irrigable command area of 18454 ha

under these distributaries utilizing a total of 4.10 TMC of water. The construction of main canal and distributor

including lateral networks are completed long back. The canal network is under irrigation since from 2001.

The construction of main canal from 0.00 to 18.00km and distributaries 1 to 4 were taken up and completed

on piece work system as per the government order during 1991-2000. The rest of the works were taken up

and completed on direct entrustment basis and tender basis. The water has been let out in canal network

during 2001 and is under irrigation.


1 Location



2 Offtake At Km 77.52 of .Narayanapur Left Bank Canal


4 Length (Km) 86.36

5 No of Structures

CTC 41

Box culverts 25

Road crossing 3

Super passage 40

SP/CTC 7

MCPC 14

Road bridge 7

Drop culvert 1

CR/Escape 2

BP 2



Page 41






Yadgir/ Shahapur

10 Hydraulic particulars



c Free Board 0.75

d Bed fall 1:6400









Page 42

Indi Branch canal

The Indi Branch Canal’s offtake point is @ 77.52 Km of NLBC tri-junction located @ Kembhavi village, Tq:

Shorapur District Yadgir. From 0.000 to 64.00 Km IBC, the Shorapur taluka under Yadgir district, Jewargi

taluk under Gulbarga District and Sindgi taluka under Bijapur district get irrigation benefits

IBC Km 0.00 to 64.00 command area most of the reaches are black cotton soil and after advent of irrigation

lands have become fertile.

Construction of Indi Branch Canal from Km 0.00 to 64.00 including Distributaries, Laterals, FIC’s under

Stage-I, Phase II of UKP have been taken up under World Bank assistance to create irrigation potential of

60,693 Ha.

The IBC from Km 0.00 to 64.00 comprises of 20 no’s Distributaries including laterals and FIC network under

them.


1 Location



2 Offtake At Km 77.52 of .NLBC


4 Length (Km) 172.00 ( 64.00 Km under Stage – I)

5 No of Structures ( Km 0.00 to Km 64.00 )

Head Regulators 20

Cross Regulators/ Escape 02

Aqueducts 06

Super passage cum Cart Track 05

Culverts 09

Super passage 11

Bridges 40


7 Command area (Ha) 1,31,260 (60,693 for Stage- I)

8 Water Utilization (TMC) 37.50 (16.27 for Stage – I)

9 District/Taluks benefitted Bijapur/Indi and Sindagi

Yadgir/Shorapur



Page 43


Gulbarga/Jewargi




c Free Board 0.75

d Bed fall 1:7400

e Canal inner slope 1:1 / 1.5:1








Page 44

Annexure - 2

REMODELLING OF NLBC

CALCULATION OF BENEFIT COST RATIO(BCR)

AS ADOPTED BY THE TECHNICAL ADVISORY COMMITTEE OF CWC

Figures are in Rs lakhs

A Gross Receipts Before Irrigation After

Irrigation

1 Gross value of farm produce 159430.88 263891.99

2 Dung receipts(at 30%of the fodder expenditure) 7174.39 7916.76

3 Total A : Gross Receipts(1+2) 166605.27 271808.75

B EXPENSES:

1 Expenditure on seeds 3607.54 4864.76

2 Expenditure on manure etc. 11682.33 15753.61

3 Expenditure on hired labour(human and bullock) 31886.18 52778.40

4 Fodder expenses(as percentage of gross value of produce)

(15% ,10% of item A.1) 23914.63 26389.20

5 Depriciation on implements (2.7% of Item A.1) 4304.63 7125.08

6 Share and cash rent (5% 3% of Item A.1) 7971.54 7916.76

7 Land Revenue (2% of Item A.1) 3188.62 5277.84

8 Total B : Expenses (1 to 7) 86555.47 120105.65

C NET VALUE OF PRODUCE

1 Total gross receipts(Total A.3) 166605.27 271808.75

2 Minus total expenses (Total B.8) 86555.47 120105.65

3 Net value of produc © : [1-2] 80049.80 151703.10

D ANNUAL BENEFITS:

1 Net value after irrigation (C:3) 151703.10

2 Minus Net value before irrigation (C:3) 80049.80

3 Net annual benefits (D):[1-2] 71653.30

E

Other net annual benefits due to aquaculture including pisciculture, drinking & industrial water supply, hydro-power generation, animal husbandry, catchment area treatment chargable to project, canal bank plantation, reservoir periphery, afforestation etc

100.00

F TOTAL NET ANNUAL BENEFITS (D3+E) 71753.30

G ANNUAL COSTS

1 Intrest on Capital @10% ( Esimated total cost of the project including cost of land development @ Rs.1000/ Ha) (306000*0.1+(408703*0.01)

34687.03



Page 45

2 Depreciation of the project at 1 % of the cost of the project for 100 years life excluding cost of Land, R&R cost.(306000 x 0.01%)

3060.00

3 Annual operation and maintenance charge at Rs 600 per Ha of ICA (306000*0.006)

1836.00

4 Energy cost for Lift Head works -

5 Maintainance of the Head works at 1% its cost -

6 Depreciation of the pumping system @ 8.33% of the cost of the pumping system assuming life of the system as 12 years

-

7 Depreciation of the raising mains @ 3.33% of the cost of the raising mains assuming life of the system as 30 years

-

8 Total (E):Annual costs (1 to 6) 39583.03

BENEFITS COST RATIO = F : Annual Benefits 71753.30 = 1.81

G.7: Annual cost 39583.03

Assumptions:

1. The total contemplated achkat under NLBC is 450613 Ha.

2. The total notified area under NLBC is 408703 Ha.

3. The cropped area is considered as per the demand raised i.e.303080 Ha.

4. Suffering achkat is considered (2-3) = 105623 Ha.

5. The intensity of Irrigation considered is 108% as per the DPR of UKP Stage – III

6. The inputs , production and prices are considered as per the DPR of UKP Stage - III

Table: Statement showing suffering achkat of NLBC and its network (Areas in Ha)

No Name of the

Canal Contemplated

command Notified

area Cropped area

Suffering Achkat

1 NLBC 47223 47223 36663 10560

2. SBC 122120 122120 89102 33018

3. MBC 51000 51000 34755 16245

4. JBC 57100 57100 34043 23057

5. IBC 131260 131260 108517 22743

6. ILC 41900

Total 450613 408703 303080 105623


Page 46

REMODELLING OF NLBC

VALUE OF INPUT-OUTPUT (BEFORE IRRIGATION)

Crop Area %age

Area Ha

Produce (Qtls/Ha)

Rate per Qtl. (Rs)

Value of produce

( Rs lakhs)

Qty of Seed Input/Ha

(Kg)

Seed Rate

Input/Kg (Rs)

Seed Rate (Rs

Lakhs)

Manure Rate

Input/Ha (Rs)

Manure Rate (Rs Lakhs)

Labour & bullock

20% of total value produce(Rs

Lakhs)

1 2 3 4 5 6 7 8 9 10

I. KHARIF CROPS

paddy 2.50 7015.74 15 1139.00 1198.64 8.00 47.75 26.80 6520 457.43 240

Hy.Jawar 15.00 42094.44 35 2369.00 34902.61 15.00 37 233.62 8200 3451.74 6981

Ground nut 15.00 42094.44 20 2700.00 22731.00 40.00 47 791.38 3520 1481.72 4546

Maize(Hybrid) 15.00 42094.44 35 1041.00 15337.11 8.00 40 134.70 2965 1248.10 3067

II RABI CROPS

Jowar 12.50 35078.70 30 1852.00 19489.73 8.00 47.75 134.00 6520 2287.13 3898

Wheat 8.00 22450.37 35 1852.00 14552.33 15.00 200 673.51 1000 224.50 2910

Sunflower 2.50 7015.74 13 995.00 907.49 9.00 180 113.66 1000 70.16 181

Gram 2.50 7015.74 8 2500.00 1403.15 30.00 115 242.04 800 56.13 281

III BI SEASONAL

Cotton 15.00 42094.44 10 6000.00 25256.67 15.00 82.54 521.17 3881 1633.69 5051

Hy. Jawar & Ratton 2.50 7015.74 20 2369.00 3324.06 10.00 100 70.16 3000 210.47 665

Chillies & vegitables 5.00 14031.48 15 8000.00 16837.78 10.00 100 140.31 1500 210.47 3368

Bajra & Pigeoupea 12.50 35078.70 10 995.00 3490.33 10.00 150 526.18 1000 350.79 698

TOTAL 108.00 303080.00 159430.88 3607.54 11682.33 31886.18


Page 47

REMODELLING OF NLBC

VALUE OF INPUT-OUTPUT (AFTER IRRIGATION)

Crop Area %age

Area Ha

Produce (Qtls/Ha)

Rate per Qtl. (Rs)

Value of produce

( Rs lakhs)

Qty of Seed Input/Ha

(Kg)

Seed Rate

Input/Kg (Rs)

Seed Rate (Rs

Lakhs)

Manure Rate

Input/Ha (Rs)

Manure Rate (Rs Lakhs)

Labour & bullock

20% of total value produce(Rs

Lakhs)

1 2 3 4 5 6 7 8 9 10

I. KHARIF CROPS

paddy 2.50 9460.72 25 1139.00 2693.94 8.00 47.75 36.14 6520 616.84 539

Hy.Jawar 15.00 56764.31 40 2369.00 53789.86 15.00 37 315.04 8200 4654.67 10758

Ground nut 15.00 56764.31 20 2700.00 30652.73 40.00 47 1067.17 3520 1998.10 6131

Maize(Hybrid) 15.00 56764.31 40 1041.00 23636.66 8.00 40 181.65 2965 1683.06 4727

II RABI CROPS

Jowar 12.50 47303.59 40 1852.00 35042.50 8.00 47.75 180.70 6520 3084.19 7008

Wheat 8.00 30274.30 35 1852.00 19623.80 15.00 200 908.23 1000 302.74 3925

Sunflower 2.50 9460.72 10 995.00 941.34 9.00 180 153.26 1000 94.61 188

Gram 2.50 9460.72 10 2500.00 2365.18 30.00 115 326.39 800 75.69 473

III BI SEASONAL

Cotton 15.00 56764.31 15 6000.00 51087.88 15.00 82.54 702.80 3881 2203.02 10218

Hy. Jawar & Ratton 2.50 9460.72 30 2369.00 6723.73 10.00 100 94.61 3000 283.82 1345

Chillies & vegitables 5.00 18921.44 20 8000.00 30274.30 10.00 100 189.21 1500 283.82 6055

Bajra & Pigeoupea 12.50 47303.59 15 995.00 7060.06 10.00 150 709.55 1000 473.04 1412

TOTAL 108.00 408703.04 263891.99 4864.76 15753.61 52778.40

krishna bhagya jala nigam limited preliminary report for remodelling ...

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