02 National workshop Urban Water Supply 07Feb2013.ppt

7/29/2019 02 National workshop Urban Water Supply 07Feb2013.ppt

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Strengthening the Resilience of the Urban

Water Supply, Drainage and Sanitation to

Climate Change in Coastal Towns

(ADB TA 7890

BAN)


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URBAN WATER SUPPLY The southern region of the country particularly the coastal

belt is very much vulnerable to climate change impacts.

Amtali being in coastal belt is under threats from the climate

change impacts. The possible climate change impacts are:

Increasing temperature leading to increase in water demand;

Enhance evaporation rate resulting to drying up surface water

pond, lake, canals and water storage/reservoir facilities;

Prolonged dry spells during dry season leading to increased

water demand; Cyclonic storms like Sidr/Aila cause disruption of water

supply;

Sea level rise due thermal expansion and melting of glacier or

storm surge will increase the risk of salinity intrusion in

ground water, the source for urban water supply.


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Water Supply:

Ensure safe drinking water throughout the

year (by increasing public awareness on

economic use of water)


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Present situation

Required remedial options Adaption's as a result of

climate change Pourashava has

2 Production

Tube Wells

(PTWs) of which

one isinoperative.

One overhead

tank, 18 kmpipeline network

and 230 deephand tube wells

Ensure safe water for drinking and other

domestic uses 24 hours delivery

services(by increasing public awareness oneconomic use of

water) To meet water demand for the year 2030, at

least 4 Production Tube Wells, 2 Over Head

Tanks and 32 km pipelines need to be

installed in addition to the existing ones. Ensure safe drinking water in the cyclone

shelters during flood times More hand pump tube wells (250) for the

city dwellers living outside the piped watersupply area need to be installed.

Programme to sensitise the community

regarding safe water use and hygiene

practices.

Increase in water demand

due to increasedtemperatures

Local population to be

encouraged adoptrainwater harvesting

Measures needed to

increase resilience ofwater supply system

needed. (Protection of

pumping station andelectricity supply)

In flood prone areas hand

tube wells to be installedabove flood level.

High level tube wellsneeded in cycloneshelters

Consider provision of

more OHT to supplywater in emergencies

Adaptation Cost 2050

(BDT in Lac) 2,774.50 138.70


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Present

situation Required remedial options Adaptations as a result ofclimate changeWater SupplySystem The

Pourashava

has 2

Production

Tube Wells(PTWs) and

1 overhead

tank, 26 km

pipeline

network and

357 deep handtube wells

Ensure safe water for drinking

and other domestic usethroughout the year

Meet water demand of the year

2050, at least 5 PTWs, 1 OHT

and 20 km pipelines need to be

installed in addition to theexisting ones.

Ensure safe drinking water in

the cyclone shelters during

flood times More hand pump tube wells

(300.) for the town dwellers

living outside the piped water

supply area need to beinstalled.

Programme to sensitise the

community regarding safe

water use and hygienepractices.

Increase in water demand dueto increased temperatures


encouraged to adoptrainwater harvesting.

Measures needed to increaseresilience of water supply

system needed. (Protection of

pumping station andelectricity supply)

In flood prone areas hand


High level tube wells neededin cyclone shelters

Consider provision of more

OHT to supply water inemergencies

Adaptation Cost

2050 (BDT inLac) 17760 138.1


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Present situation Required remedial options Adaption's as a result ofclimate change

Water Supply SystemSurface water intakes fromBaleshwar River .

Public health, During disaster/tidal

surge/flash flood, drinking

water sources are affected

and contaminated as the

piped network and hand

pump tube wells become

submerged. Consequently,

the communities suffer from

water-sanitation relateddiseases. Recently, Cyclones

Sidr and Aila had a severe

impact on public health and

the incidence of disease

during these cyclones. Baleshwar River is suffering

from siltation

Ensure safe water for drinking and

other domestic use throughout theyear.

Kacha river may be considered as

second surface water source for publicwater supply through SWTP.

Rain water may be preserved byconstructing adequate reservoir

Investigate potential groundwateraquifer through test drilling as

alternative source for public water

supply (possible areas are Tala and

Satkhira union) More hand pump tube wells in feasible

area particularly for the city dwellers

living outside the piped water supply

area need to be installed.

Increase flows in Baleshwar River bynecessary dredging. Regular water quality monitoring Programme to sensitise the community

on safe water use and hygienepractices.

Increase in water demand

due to increasedtemperatures


encouraged adoptrainwater harvesting

Measures needed to

increase resilience of

water supply systemneeded. (Protection of

pumping station and

electricity supply) In flood prone areas hand


High level tube wells

needed in cyclone

shelters

Consider provision ofmore OHT to supplywater in emergencies

Adaptation Cost 2050(BDT in Lac) Option I 5,397.00 269.90Adaptation Cost 2050(BDT in Lac) Option II 7,337.00 336.90


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Sl Structural Interventions Projectedquantity

1 Production Well with pumps and pumphouse (depth av. 380 m)

5 nos.2 Over head reservoir (500 m3) 2 nos.3 Distribution pipe line (100 ~200 mm dia.)

class C 32 km4 Replacement of under size pipelines (by

100~200 mm dia.)class C9 km

5 House connection/yard shared tap withmeter 4,656 nos.

6 Hand tube-well (Deep) 100 nos.


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Sl Components Projectedquantity

1 Production Well with pumps and pumphouse (depth av. 380 m) 5 nos.

2 Over head reservoir (500 m3) 2 nos.3 Distribution pipe line (100 ~200 mm dia.)

-class C 20 km4 Replacement of under size pipelines (by

100~200 mm dia.) -class C 12.5 km5 House connection/yard shared tap with

meter 5,000 nos.6 Hand tube-well (Deep) 50


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Sl Infrastructural interventionsProjectedquantity

1 Distribution pipe line (100 ~200 mm dia.)class C 82 km2 Intake pipe line from river Kocha to existing water

works compound including intake pumping station 8.0 km3 Extension of water treatment works construction ofTP (300 m3), pre-settling tank, river intake station,

intake pipeline etc.

LS4 Overhead Tank (680 m3 capacity) 3 nos.5 Treated water Transmission pipeline 8.0 km6 Booster Station 4 nos.7 House connection/yard shared tap with meter 11,288 nos.8 Hand tube-well (Deep) 200 nos.9 Exploratory boring in search of sweet water aquifer 10 nos.

10 River dredging Baleshwar river 10,000 m3

02 National workshop Urban Water Supply 07Feb2013.ppt

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