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There is a vast difference in availability
of water from one basin to other. The National Commission on
Integrated Water Resources Development (NCIWRD) has estimated the basin wise water
requirements for different periods.
Summary of Basin-wise total water
requirement for 2050
|
Basin name |
Catchment area
in
India km2
|
Population
year 1991
million |
Total water requirement
km3 |
|
Surface water |
Ground water |
Total |
|
Indus |
321,289 |
41.9 |
47.24 |
29.88 |
77.12 |
|
Ganga |
862,769 |
356.8 |
311.96 |
182.11 |
494.08 |
|
Brahmaputra |
197,316 |
29.1 |
28.46 |
27.37 |
55.83 |
|
Meghna |
41,157 |
6.2 |
3.76 |
8.57 |
12.33 |
|
Subernarekha |
29,196 |
9.5 |
7.43 |
2.62 |
10.05 |
|
Brahmani-Baitarni |
51,822 |
9.8 |
17.53 |
3.59 |
21.12 |
|
Mahanadi |
141,589 |
26.6 |
36.5 |
24.46 |
60.96 |
|
Godavari |
312,812 |
54 |
56.45 |
42.33 |
98.78 |
|
Krishna |
258,948 |
60.8 |
6.88 |
30.64 |
91.53 |
|
Pennar |
55,213 |
9.7 |
9.93 |
3.92 |
13.84 |
|
Cauvery |
87,900 |
29.3 |
20.08 |
15.10 |
35.19 |
|
Tapi |
65,145 |
14.8 |
13.31 |
4.88 |
18.19 |
|
Narmada |
98,796 |
14.7 |
23.81 |
6.90 |
30.71 |
|
Mahi |
34842 |
10.5 |
7.18 |
3.0 |
10.19 |
|
Sabarmati |
21,674 |
10.6 |
5.77 |
2.89 |
8.66 |
|
West flowing rivers
of Kachchh & Saurashtra including Luni |
334,390 |
29.2 |
16.98 |
11.75 |
28.73 |
|
West flowing rivers
between Tapi & Kanyakumari |
113,057 |
58.4 |
40.73 |
10.35 |
51.08 |
|
East Flowing rivers
between Mahanadi & Pennar |
86,508 |
23.6 |
20.99 |
6.42 |
27.41 |
|
East flowing rivers
between Pennar & Kanyakumari |
99,777 |
45.0 |
19.28 |
11.16 |
30.44 |
|
Minor rivers draining
into
Bangladesh &
Myanmar |
36,302 |
2.1 |
2.54 |
1.21 |
3.75 |
|
Area of
North Ladakh not draining into
Indus |
28,478 |
|
|
|
|
|
Drainage area of
Andaman, Nicobar & Lakshdweep islands |
8,280 |
|
|
|
|
|
Total |
3,287,260 |
842.6 |
750.8 |
429.0 |
1,180.0 |
|