case study watersupply by anita yadav
TRANSCRIPT
Presentation on Case Study
Studies on Canal Water Supply, Total Water Availability, Water Demand and Water Utilization Pattern in Khetawali Distributory of Indira Gandhi Nahar
Pariyojana
Presented By
Anita YadavDepartment of Geography,
Government Boys College, Sriganganagar – 335 001
IGNP-An Introduction
One of the world’s biggest canal system. Covers 7 Districts of Rajasthan. Very Erratic rainfall between 100-400mm. The water in the region is very low & Saline.
IGNP- The Promise Fulfilled
Changed traditional Demographic structure, Culture & Environment.
Traditional crops like moth beans, pearl millets were replaced by cotton, paddy, wheat, mustard.
Spectacular rise in food grain production.
IGNP- The Present Scenario
Overall irrigation efficiency is less then 40%. Problem of water logging, salinity increased. Inadequate management of water system. Lack of coordination between water
managers and agriculturists.
What Went Wrong ?
Water availability, Water Demand
Gap in Demand & SupplyWater utilization pattern of Crops
The Study-Methods & Material
Area – Khetawali Distributory. Period – 10 years (1994-2004). All 24 outlets including its two minors
namely, Khetawali Minor, Amarpura Minor.
Methods & Material….contd.
Design Discharge – Khetawali Distributory. Water utilization-- Crop Area/Water
requirement of a Crop. Relative water Supply (RWS)
RWS= (IR+RN)/ Et +S&P)where IR= mean irrigation application (mm/day), RN= mean rainfall (mm/day), Et = mean evapotranspiration (mm/day) and
S&P = seepage and deep percolation (mm/day)
Results & Discussion
Rainfall pattern in the command of KWD
237
369416 419
315
128173
243
117
219
136
050
100150200250300350400450
mm
94 95 96 97 98 99 0 1 2 3 4
Year
JanFebMarAprilMayJuneJulyAugustSeptOctNovDecTotal
Results & Discussion
Month wise Canal flowing period of KWD in different years
194212 214
192
268240
165142
98
184
108
0
50
100
150
200
250
300
Days
94 95 96 97 98 99 0 1 2 3 4
Year
JanFebMarAprilMayJuneJulyAugustSeptOctNovDecT
Results & Discussion
Cropped area (hectares) during Kharif in different systems of KWD
301729863232
1811
331631143097
1609
672
3288
0
500
1000
1500
2000
2500
3000
3500
Area
1994 1996 1998 2000 2002
Year
KWDKWMARMTotal
Results & Discussion
Cropped area (hectares)during Rabi in different systems of KWD
3242326332383443.134563101
286531843177
3580
0500
1000150020002500300035004000
Area
94-95
95-96
96-97
97-98
98-99
99-00
00-01
2-Jan
3-Feb
4-Mar
Year
KWDKWMARMTotal
Results & Discussion
Water utilization by major Kharif crops
79.3
6.6
82.2
10.3
77.2
12.6
62.9
9.1
66.7
9.8
34.830.2
70.5
4.1
49
6.6
82.7
6
73.4
5.10
10
20
30
40
50
60
70
80
90
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
A. CottonD. CottonGuarForage
Results & Discussion
Water utilization by major Rabi crops
80.8
7.7
83.1
6.2
83.6
7.1
78.2
5.8
80.1
6
91.3
2.1
91.8
1.3
89.3
3.8
70
17.8
72
11.20
102030405060708090
100
%age
94-95
95-96
96-97
97-98
98-99
99-00
00-01
2-Jan
3-Feb
4-Mar
Year
Wheat
Mustard
Gram
Barley
Forage
Results & Discussion
Relative water supply in KWD system during Kharif season
0.8 0.8
0.931.04
0.74
0.57 0.61
0.92 0.96
0.76
0
0.2
0.4
0.6
0.8
1
1.2
RWS
1994199519961997199819992000200120022003
Results & Discussion
Relative water supply in KWD system during Rabi season
0.96
0.7 0.680.74
0.81
0.58
0.35
0.480.42
0.5
00.10.20.30.40.50.60.70.80.9
1
RWS
1994-951995-961996-971997-981998-991999-002000-012001-022002-032003-04
Conclusion
Water supply was less than crop water demand in both the seasons over the years.
American cotton during Kharif may be replaced by less water requiring crops.
Wheat during Rabi may be replaced by mustard and gram.
Crop diversification for sustained crop production.
Thanks
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