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.
Highlights
Economic and population growth, changes in eating habits and rural and urban drifts put pressure on water resources [1]
Due to various factors, such as irrigation methods and technologies, water equipment and the uneven distribution of water resources in China, it is difficult to further the improvement of agricultural water use efficiency; the maximization of the irrigation water value is of great significance for agricultural development in arid areas [5]
To deal with the optimal water distribution problem in the canal system, the core concept of using the backtracking-search algorithm (BSA) was the progressive selection of the optimal permutation combination to ensure that the remaining flow would tend toward the minimum [18]
Summary
Changes in eating habits and rural and urban drifts put pressure on water resources [1]. In the process of “constant flow, control open”, Civicioglu [19] proposed the backtracking-search algorithm for the optimization model of water distribution in an irrigation area and provided a solution for the water distribution scheme, which had the shortest water distribution time and the most stable water flow delivery. It was different from other algorithms because of its simple structure and single control parameter. On the basis of the new irrigation feasible scheme and the hydrodynamic information, the variation in the opening degree of each gate was calculated to provide a reference for a water-saving and efficient irrigation system in Xiying
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