基于WinSRFR 5.1的地面灌水技术不确定性研究  

Research on Uncertainty of Ground Irrigation Technology Based on WinSRFR 5.1

作　　者：高卓卓 郑志伟 GAO Zhuo-zhuo;ZHENG Zhi-wei(Department of Hydraulic Engineering,Tianjin Agricultural University,Tianjin 300384,China)

机构地区：[1]天津农学院水利工程学院,天津300384

出　　处：《节水灌溉》2021年第2期24-27,共4页Water Saving Irrigation

基　　金：天津市科技支撑重点项目(18YFZCSF00650);天津市企业科技特派员项目(19JCTPJC58300)。

摘　　要：为了解决农田畦灌畦田规格不合理、灌溉效率低下、水资源浪费等问题。采用2次田间灌水试验和WinSRFR 5.1模型分析相结合的方法,模拟地面灌溉水流过程和灌水质量情况。第1年田间实测灌水结合WinSRFR 5.1模型率定土壤入渗参数(入渗系数K和入渗指数α);第2年田间实测灌水是对模型进行验证,根据WinSRFR 5.1模型模拟得到的灌水质量等值线图对参数进行不确定性分析。结果表明,灌水技术不确定性与灌水技术参数有很大关系,畦长和流量对灌水效率和灌水均匀度有很大的影响,灌水效率对畦长变化更加敏感,灌水均匀度对单宽流量变化的影响更为显著。根据灌水质量等值线图得到满足灌水质量要求的畦长和流量组合范围,即畦长30 m以内,单宽流量增加对灌水质量影响不大;畦长30~53 m,单宽流量为2.7~5.7 L/(s·m);畦长50~100 m,单宽流量≥3.34 L/(s·m);畦长100~150 m,单宽流量≥6 L/(s·m)。In order to solve the problems of unreasonable specifications of farmland border irrigation,low irrigation efficiency,and waste of water resources,this study used a combination of two field irrigation experiments and WinSRFR 5.1 model analysis to simulate the surface irrigation flow process and irrigation quality.In the first year,soil infiltration parameters(infiltration coefficient and infiltration indexα)were determined by field irrigation combined with WSRFR 5.1 model.In the second year,field measured irrigation was used to verify the model,and uncertainty analysis of parameters was carried out according to the irrigation quality contour map simulated by WSRFR 5.1 model.The results show that the uncertainty of irrigation technology is closely related to the parameters of irrigation technology.Border length and flow have a great impact on irrigation efficiency and irrigation uniformity.Irrigation efficiency is more sensitive to uncertainty factors than irrigation uniformity.According to the contour map of irrigation water quality,the combined range of border length and flow rate that meets the requirements of irrigation water quality is obtained.The border length is within 30 m,and the increase of single-width flow has little effect on irrigation quality;The border length is 30~53 m,and the single width flow rate is 2.7~5.7 L(/s·m);the border length is 50~100 m,and the single width flow rate is≥3.34 L(/s·m);the border length is 100~150 m,and the single width flow rate is≥6 L(/s·m).

关 键 词：畦灌 灌水质量 winSRFR 灌水技术参数 灌水效率 灌水均匀度 

分 类 号：S275[农业科学—农业水土工程] TV93[农业科学—农业工程]