Study on Unsteady Flow Based on Optimized Water Distribution Model in Irrigation District

Abstract

The canal delivery system is the main infrastructure of agricultural irrigation. The efficiency of water use in agriculture can be achieved by mastering the dynamic process of unsteady flow in the channel. In this study, an unsteady flow model for the calculation of the water flow transition information of the river channel during the water distribution process was established, based on the water distribution scheme given by the backtracking-search algorithm (BSA). This model was more suitable for areas with inefficient channel systems. The research areas included the main irrigation channels in Xiying City, which is one of the typical agricultural areas in northwestern China. The scheme obtained by optimal solution proposed for Xiying Irrigation District was feasible. According to the results of the flow simulations, the sluice gate calculation correlation could determine the change process of the gate opening of each channel, which provided a basis to realize the modernization of the irrigation area.

Journal of Water and Land Development

“…The reasons for the destruction of the channel of the earthen canals are primarily the concentrated discharge of the descending water and the presence of unsteady flow, especially during water distribution [ASHOOR, RIAZI 2019;WU et al 2020].…”