Model for predicting the hydraulic elements of drip irrigation system with automatic flushing valves under high sediment water

文献类型： 外文期刊

第一作者： Gao, Hao

作者： Gao, Hao;Mo, Yan;Gong, Shihong;Gao, Hao;Wu, Feng;Wang, Jiandong;Gao, Ni

作者机构：

关键词： Yellow River water; Clogging; Flushing duration; Flushing flow rate; EPANET

期刊名称：BIOSYSTEMS ENGINEERING （ 影响因子：5.1； 五年影响因子：5.5 ）

ISSN： 1537-5110

年卷期： 2023 年 228 卷

页码：

收录情况： SCI

摘要： Automatic flushing valves (AFVs) installed at the end of the driplines can increase the service life of drip irrigation systems. An automatic flushing drip-irrigation model (AFDM) for calculating the pump pressure and flow rate of automatic flushing drip-irrigation sys-tem (AFDS) was developed using the EPANET software. The optimal hydraulic design of an AFDS was obtained in an integrated manner to determine AFV specification and layout pattern including the number (m) of driplines that one AFV controls and the parameters of pump to match T (the flushing duration per dripline length) and to control AFV automatic shutdown. Experimental hydraulic elements from three AFVs with five layout patterns were considered. The normalised root mean square error of predicted and measured pressure and flushing flow rate were 4.92-5.98%. Results showed that AFDM can be used to design AFDS with an acceptable accuracy. AFDM was applied to an AFDS with Yellow River water for sunflower, under 12 scenarios of 3 AFVs (F1, F2 and F3 with flushing duration of 30, 45 and 73 s, respectively) and 4 layout patterns (m = 1, 2, 5, 10). It was found that the larger m the lower the pressure and flowrate of the pump needed to supply, but it will lead to the decrease of T, resulting in poor flushing. The combination of one F3 for controlling five driplines is better since it not only ensures the flushing, but also uses lower pump pressure, flow rate, and fewer AFVs.(c) 2023 IAgrE. Published by Elsevier Ltd. All rights reserved.

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