IRRIGATION WATER MANAGEMENT SIMULATION MODEL FOR LOWLAND RICE PRODUCTION

Abstract

An irrigation water management computer simulation model for lowland rice production was developed using the concept of rotation irrigation. It was designed so that the number of rotation areas and interval of irrigation could be varied within the program. Input parameters included maximum irrigable area, variety of rice which determined the period of irrigation, kind of soil and efficiency of the irrigation system. To run the computer simulation model, data on rainfall, pan evaporation and stream flow were necessary. The model can be used to determine the appropriate time of planting rice and to solve problems in water management.