A STRUCTURAL SYSTEMS ANALYSIS APPROACH TO DETERMINE OPTIMUM OPERATING POLICIES FOR IRRIGATION AND HYDROPOWER GENERATION FOR WATER RESOURCES SYSTEMS

A methodology for analyzing water resources systems with a twofold purpose, irrigation and power generation, is developed and implemented. The proposed methodology can be classified as a multilevel hierarchical approach. Special attention is given to developing and integrating the various optimization and simulation models needed to describe and analyze the subsystems of the whole system, as well as to analyze the stochastic nature of the streamflow and other local conditions within the framework of the targets and objectives of a national agricultural system and a regional power generation set-up. A method for generating monthly streamflows for semi-arid regions is proposed. Two dynamic programming models are developed and implemented for analyzing a reservoir which supplies an irrigation unit and a reservoir to generate hydroelectric energy. A simulation model is developed and used as an evaluating and coordinating unit for the water resources system analyzed. The application of the methodology is described for the case of the Yaqui system located in northwestern Mexico.