Abstract
In the present study, a Linear Programming (LP) model is developed for the conjunctive use of surface water and ground water to obtain the optimal operating policy for a multipurpose single reservoir. The objective of the present study is to maximize the net benefit from the command area under consideration. The constraints imposed on the objective function are maximum and minimum irrigation demands, reservoir storages and canal capacity. The model takes into account the continuity constraint which includes inflows in to the reservoir, releases for irrigation, releases for hydro-power generation, evaporation losses, feeder canal releases, initial and final storages in the reservoir in each time period. The developed model is applied to the case study of Jayakwadi reservoir stage-I, built across river Godavari, Maharashtra, India. Initially the model is solved for the availability of surface water which results in net benefit of 3373.45 million rupees with irrigation intensity is 57.07%. Next the model solved by considering the availability of surface water and available potential of groundwater in the area, which results in net benefits of 3590.02 million rupees with an intensity of irrigation 58.48%. The present model takes in to account the socio-economic requirement of growing the essential crops to meet the requirement of the society. The model has also generated the canal wise optimal releases for irrigation and power, monthly utilization of groundwater, storages in the reservoir at the end of every month and corresponding head over the turbine.
Highlights
The optimal operation of a reservoir system for efficient utilization of both surface and groundwater resources conjunctively requires knowledge of reservoir process and infield process
Many researchers have worked on several aspects of the conjunctive use of surface and ground water such as 1) reservoir/stream and aquifer interaction for assessment of conjunctive use potential; 2) modeling of conjunctive use of surface and groundwater; 3) optimal planning using different techniques
The reservoir operation model is developed for Irrigation Planning with Conjunctive use of surface and groundwater
Summary
The optimal operation of a reservoir system for efficient utilization of both surface and groundwater resources conjunctively requires knowledge of reservoir process and infield process. This knowledge facilitates to arrive at decisions on reservoir operation and cropping pattern by use of optimization models. These are characterized by a mathematical statement of objective function to give global optimum solutions. Many researchers have worked on several aspects of the conjunctive use of surface and ground water such as 1) reservoir/stream and aquifer interaction for assessment of conjunctive use potential; 2) modeling of conjunctive use of surface and groundwater; 3) optimal planning using different techniques. Regulwar et al [17] have estimated the groundwater resource by carrying out geoelectric field survey with vertical electrical sounding techniques (VES)
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