8/9/2019 Imphal Easaa

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Government of India

Ministry of Water Resources, River Development Ganga Rejuvenation

Central Ground Water Board, North Eastern Region, Guwahati

The eastern and northern parts ar

me feasible for the development of

ground water through shallow to

moderately deep tube wells down

to 75 m tapping about 10 to 30 m

of cumulave thickness of granular

horizon.

In the central part ne-grained

granular horizons of cumulave

thickness of 10 to 20 m are encoun-

tered up to 100 m. The area is suita-

ble for the construcon of tube

wells for domesc supplies.

Imphal East district is part of

main Imphal city with its district

head quarter at Porompat.

The district experienced sub-

tropical to temperate climate. Theaverage annual rainfall is 993.15

mm.

The district is flat elongated and

tapering towards south with iso-

lated hills. It is an intermountain

valley surrounded by hillocks

about 1,500 -2,000 meters high.

Hydrogeologically, the district is

mostly occupied by Semi consoli-

dated formations comprises o f

shale, siltstone, sandstone and

conglomerate.

Exploitation of ground water inthe district began in June 1996 in

the Potsangbam well filed. The

well field comprises ten produc-

tion boreholes (total depth com-

prised between 45 m and 60 m,

unit discharge of borehole ranges

from 1,087 to 1,512 l/m.)

Aquifer thickness ranges from 10

to 20 mbgl. The discharge of

tube wells established is about

10-30 m3 /hr at 10-15 m draw-

down.

Annual Replenishable Ground

Water Resources is 128.70 mcm.

Net Annual Ground Water Draftis 0.42 mcm. Projected Demand

for Domestic and Industrial Use

up to 2025 is 11.64 mcm. Stage

of Ground Water Development is0.36 which is under the Safe

category.

Proper rehabilitaon of these

sick wells in the enre area is to

be carried out so as to migate

water scarcity as reported from

dierent village.

The chemical parameters in the

ground water are found within

Permissible limit of BIS except Fe.

Existing hydrogeological setup indicates scope of groundwa-

ter development by way of con-

structing groundwater abstrac-

tion structures scientifically.

Regulations on withdrawal

and enhancing the recharge

through artificial means are the

options left to keep a control on

this problem.

The ground water movement is

essenally towards the central

lower part from the peripheral

higher elevaon of the valley

and nally results to the north

to south hydrologic gradient dur-

ing pre-monsoon and north to

south west south (SWS) region

during post-monsoon .

Based on the hydrogeological condions, occurrence of

potenal aquifer horizons and their yield potenal, pro-

spects for ground water development in the study area are

mainly conned to the valley only.

Depth to water level recorded during DGWMS

was1.08 to 10.32 mbgl for pre-monsoon (2004) and it was

1.0 to 6.2 mbgl for post-monsoon (2004). Annual water

level uctuaon ranges from 1.83 to 7.35m.

Imphal East District Manipur