Effect of including water price on the conjunctive operation of a surface water and groundwater system

A mathematical model is developed to study the impact of water price on residential water demand and on the conjunctive operation policy of a surface water and groundwater system. The economic objective is the maximization of the present worth of net benefits from operation of the supply system. The objective function and constraints are nonlinear. A nonlinear programing algorithm is used to find the optimum operation strategy for the conjunctive management of the supply sources. A hypothetical system is studied to test the efficiency of the computer program.