Abstract:
In this study, MIKE BASIN has been used as a decision support tool for irrigation management and water sharing of Rangawan
reservoir, an interstate project of Madhya Pradesh and Uttar Pradesh in India.The water sharing and optimum irrigation releases
have been analyzed by developing two separate models in decision support tool; the first model computes irrigation demand and
offers inputs to the second model, which calculates water supplies and deficits as per the water sharing agreements between the two
states. The models have been used to generate twelve different scenarios for evaluation of irrigation demands, water supply, and
demand deficit/excess for actual cropping pattern in command of Madhya Pradesh part. Simulated results showed, in average/wet
rainfall year with conveyance efficiency of 60% and application efficiency of 70%, the irrigation demand of 11.83Mm3 has been
found satisfying without any deficit. By improving efficiencies, conjunctive use, and managing irrigation supplies as recommended
fromscenarios of DSS application, more areas in the command can be brought under irrigation.The developed models can be used
for real time reservoir operation and irrigation planning under variable climatic conditions, conveyance and application efficiencies,
consumptive use of surface and groundwater, and probable runoff and cropping pattern.
