Abstract
The operators of source reservoir should estimate the irrigation requirement and discharge when the distance between source reservoir and beneficial area is long. The estimation of the irrigation requirement is often difficult because the duty of water at the beneficial area is influenced by rainfall. This is one of the causes of water delivery loss. But the discharge before rainfall can be used later on, if it is saved in the regulating reservoir which is built between source reservoir and beneficial area. The regulating reservoir can decrease the amount of water delivery loss. The capacity of regulating reservoir and the operation of reservoirs for the decrease of water delivery loss are suggested and its effect is showed by the simulation.
