This book presents a Linear Programming (LP) model developed for the conjunctive use of surface water and ground water to obtain the optimal operating policy for a multipurpose single reservoir. The present study explains how 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 storage 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,...