G.ARUN KUMAR BTE – 06 - 005

Annual precipitation - 4000 km3

Annual flow per year for the Indian rivers -1953 km3. Annual replenishable groundwater resources -432 km3

Annual utilizable surface water 690 km3 per year Annual groundwater resources 396 km3 per year Cherrapunji - Highest Rainfall in the world

River basin Drainage area ( km2)

Average annual run-off (km3)

Average run-off per km2 (m3)

Brahmaputra 194.4 537.2 276300

Barak 78.1 59.8 765600

State Total replenish able ground water resources(km3)

Ultimate

Irrigation potential

Approximate annual rain water received (km3) Major

projects Minor irrigation

AP 1.43 100 10 156

Assam 24.71

1700 158

Manipur 3.15 100 5 42

State Total replenish able ground water resources(km3)

Major projects

Minor irrigation

Approximate annual rain-water received (km3)

Meghalaya

0.54 85 15 54

Mizoram --- 55 5 40

Nagaland 0.72 75 5 38

Tripura 0.66 100 5 22

Total region

31.21 1485 1755 510

CONTD….

STATES CANALS TANKS WELLS OTHER SOURCES

AP 1521 813 568 96

Assam 362 --- --- 210

Manipur --- --- --- 65

Meghalaya --- --- --- 37

NAGALND --- ---- ---- 12

Orissa 263 583 45 258

Tripura --- --- --- 22

West Bengal

960 303 17 26

STATES Ultimate potential m.ha

Utilization of potential till 1973-74 (m.ha-m)

% of Utilization of potential

Assam 2.190 0.091 4.15

Orissa 3.947 1.673 42.39

West Bengal 3.840 1.126 31.66

Bihar 6.80 2.044 30.06

Purpose 2001 2025

Agriculture 20.0 28.0

Domestic use 2.9 5.5

Energy 1.5 3.0

Industry 1.5 3.0

Others 1.5 3.5

Total 27.4 43.0

In eastern india’s unconfined alluvial aquifers, it is being

increasingly realized that groundwater depletion can be countered

only by importing surface water.

The purpose of the project is to identify reliable sources of water

of sufficient quantity and quality to supply.

http://www.ias.ac.in/currsci/sep102005/794.p

df

http://www.iwrs.in/iwr.htm

A.M.Michael “Irrigation theory & practice”

A. Narayanamoorthy “Trends in Irrigated Area

in India: 1950-51 to 2002-03”