Forecasting system of irrigation water on paddy field by fuzzy theory

This paper presents the results of a study on a forecasting system of irrigation water requirements which can support the operational work of administrators regarding water supply and water distribution in the irrigation schemes. The system is formulated by using the fuzzy theory based on analysis of the logic of water management which has been composed from the experience and knowledge of administrators, and is composed on a personal computer to apply to the actual water management of a paddy field area. From the results of field tests of this system, this paper demonstrates the strategy for forecasting which mostly depends on the intuitional and creative judgment of administrators. The application of the system to water resources management in a basin is also proposed.