Action taken by BWSSB in preventing pollution

of Lakes

Bangalore Valley System

Well defined valleys

– 4 Major valleys Koramangala Challaghatta Hebbal Vrishabhavathi

– Minor valleys Arkavathi, Kathriguppe and Kethamaranahalli

(Vrishabhavathi Valley) Taverekere (Koramangala valley)

BANGALORE’S CASCADING LAKES SERIES

Un planned growth of city Un sewered pockets such as slums and erstwhile CMC areas Damage of main sewers Blockages and overflows in the sewer system Direct letting out of raw wastewater into storm water

drainage system from un-sewered as well as sewered pockets Lack of adequate infrastructure facilities Dumping of solid waste within the drainage zones

Reasons for pollution of Lakes

Sewerage management in Bangalore

Facts Total sewage generated in Bangalore – 1000 MLD Sewerage connections – 8 Lakh Sewerage network

Laterals (< 300 mm dia) – 3367 KmsTrunk Sewers (>300 mm dia) – 302 Kms

Number of plants – 14 Sewage treatment capacity – 721 MLD Average Present treatment – 453 MLD

Measures for abating Lake Pollution

1) Replacement/ Rehabilitation/ Up gradation of old sewerage net work – Laterals and Trunk sewers in core city

2) Creation of New Sewerage Net Work Erstwhile CMC area – 2300 Kms 110 Villages – 2000 Kms

Total – 4300 Kms3) Creation of Additional Treatment capacity to

treat wastewater produced in the new areas

Environmental Action Plan – A Replacement and Rehabilitation of existing sewers Total length – 33 Kms Cost – Rs. 47 Crores under NRCP Work is completed

On going projects

On going projects

Environmental Action Plan – B

Replacement and Rehabilitation of existing

sewers Total length – 70 Kms Taken up under 8 packages Cost – Rs. 176 Crores under JnNURM & JICA Project period 2010-2013

On going projects

Zero Flow in Hebbal drainage zone Length – 19 Kms Taken up under 3 packages Cost – Rs. 35 Crores under BWSSB funds

& Mega city funds Project period 2010-2013

On going projects

Providing UGD Facilities to 8 ULBs in BBMP area

• Estimated Cost : Rs. 1098.15 Crore

• Amount put to bid : Rs. 966.21 Crore

• Awarded Cost : Rs. 1191.79 Crore

• Funding : JnNURM - World Bank

• Project Period : 4 Years

• Length of pipeline to be laid : 2300 Kms

• Number of packages : 24

On going projects - progressSl

No. ULB’s Total Pipe

laying Qty to be

achieved in Kms

Progress achieved in

Kms

Percentage Completion Date

1 Yelahanka CMC 60.28 57.82 95.92% Feb-132 Byatarayanapura CMC 468.81 269.46 57.47% Feb-143 Mahadevapura CMC 357.11 155.81 43.63% Sep-154 Krishnarajapuram CMC 314.85 246.91 78.42% Feb-145 Bommanahalli CMC 466.91 260.84 55.86% Feb-146 Rajarajeshwarinagar CMC 117.22 78.37 66.85% Feb-147 Kengeri TMC 57.62 14.1 24.47% Sep-148 Dasarahalli CMC 470.92 374.61 79.54% Feb-14

TOTAL 2313.72 1457.91 63.01% Sep-15

Construction of new treatment plants 11 Numbers under JICA assistance 339 MLD Capacity with nutrient removal treatment process 300 MLD plant at V Valley at a cost of Rs. 396 Crore

Environmental Action Plan – C Cost – Rs. 360 Crores Length – 109 Kms

Water supply and Sanitation to 110 Villages Awaiting clearance from Central Government

Future projects

Treatment plants proposed under CWSS Stage IV Phase II

Name Capacity in MLD Process (Including BNR)

Raja Canal 40 Extended Aeration (EA)

Horamavu Agara 20 Sequential Batch Reactor (SBR)

Nagasandra 20 SBR

Chikkabanavara 5 SBR

Kadugodi 6 SBR

Kachohalli 3 Membrane Bio – Reactor

Kengeri 60 Activated Sludge Process (ASP)

K & C Valley 60 ASP

Bellandur Amanikere 90 ASP

Doddabele 20 SBR

Yellemallappa Chetty Kere 15 SBR

Total 339

MonthAverage daily inflow in ML

2006 2007 2008 2009 2010 2011 2012January 198.89 246.07 210.01 307.00 303.28 271.98 259.98February 233.55 247.32 216.15 316.33 318.15 251.02 277.56March 236.92 234.59 264.28 313.87 330.55 261.97 275.28April 269.88 264.22 305.91 277.75 276.15 274.92 270.90May 310.17 276.99 294.20 251.55 323.67 251.50 249.71June 224.34 299.24 304.44 244.93 307.66 279.12 285.55July 245.12 289.05 278.76 236.87 308.70 304.51 356.58August 253.33 327.73 301.85 275.66 306.78 285.22 354.27September 295.74 268.33 257.06 292.62 285.64 252.68 356.13October 301.31 247.88 261.78 271.95 297.04 304.74 383.27November 288.76 238.10 264.39 265.12 301.92 309.28 379.74December 245.59 217.67 303.05 269.91 275.20 249.00 384.29Average 258.72 263.18 272.75 276.72 302.88 274.81 320.50

Quantity of used water treated in the existing treatment plants

Monthly Average inflow to treatment plants in MLD

Treatment Plant and capacity January-13 February-13 March-13V Valley 180 MLD 68.17 67.18 74.45Mailasandra 75 MLD 47.14 48.99 52.58Nagasandra 20 MLD 7.24 5.68 7.34Hebbal 60 MLD STP 18.25 34.16 34.16Yelahanka 10 MLD STP 4.28 5.21 5.51Jakkur 10 MLD STP 4.44 4.70 4.91Raja Canal 40 MLD STP 19.00 28.04 39.35K R Purum 20 MLD STP 9.89 12.38 12.18Kadabeesanahalli 50 MLD 27.44 36.43 36.12K & C Valley 218 MLD 144.85 148.09 149.64K & C Valley 30 MLD 28.89 28.81 30.27Lal Bagh 1.50 MLD 1.20 1.08 1.08Cubbon Park 1.50 MLD 1.06 1.25 0.85Madivala 4 MLD 3.79 3.79 3.79Kempambudhi 1 MLD 1.00 1.00 1.00Total - 721 MLD 386.64 426.76 453.22

Benefits after the completion of UGD works under KMRP

Erstwhile ULB Name of the Lake No. of lakes

Yelahanka Attur, Puttenahalli, Yelahanka, Allalasandra, Jakkur, Shivanahalli

6

Bytarayanpura Chikkabanavara, Singapura, Abbegeri, Vidrayanapura, Doddabommasandra, Tindlu, Hebbal, Nagavara, Jakkur, Rachenahalli, Amruthahalli, Hennur, Byrathikhane, Kalkere, Rampura

15

Erstwhile ULB

Name of the Lake No. of lakes

Mahadeva pura & K R Purum

Munekollal, Sadaramangala, Bhattrahalli, Vengeankere, Ramamurthy Nagar, Basavapura, Yellemallappa Chetty, Kaggadasapura, Vibhuthipura, Varthur, Mahadevapura, Ganghadhar, Doddakundenahalli, Kundenahalli, Rajupallya, Benniganahalli, Sigehalli, Siddapura

18

Benefits after the completion of UGD works under KMRP

Erstwhile ULB

Name of the Lake No. of lakes

Bommana halli

Jaraganahalli, Chunchanaghatta, Puttenahalli, Kothunur, Arekere, Hulimavu, Madivala, Agaram, Varthur, Begur, Chikkabegur, Singasandra, Kadagi Singasandra, Somasundra palya, Garvibhavpalya, Hosapalya

16

R R Nagar & Kengeri

Mallathahalli, Hosakere, Kengeri, Dubasapalya, Halgevadrahalli

5

Benefits after the completion of UGD works under KMRP

Erstwhile ULB

Name of the Lake No. of lakes

Dasarahalli Dasarahalli, Doddabidrakallu, Herohalli, Laggere, Shivapura, Pillappakatte, Bagalkunte, Mallasandra, Chikkabanavara, Nelegadaranahalli

10

Total 70

Benefits after the completion of UGD works under KMRP

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