水利学报2025，Vol.56Issue(2)：205-215,11.DOI:10.13243/j.cnki.slxb.20240222
间断式改进暗管排水流量的计算方法
A method for calculating drainage flow in intermittent improved subsurface pipes
摘要
Abstract
To address the issues of frequent waterlogging disasters in the field and the scarcity of arable land re-sources,an intermittent improved subsurface pipe drainage structure was proposed,which offers a larger drainage flow and occupies less farmland.In general,the conventional subsurface pipe can be simplified to two-dimensional calculation,but the intermittent improved subsurface pipe has three-dimensional seepage around the cylinder sand filter in the process of drainage,forming a relative complex spatial seepage structure.By combining the drainage formula of Sha Jinxuan partially penetrating well and the drainage formula of conventional subsurface pipe,a sim-plified method for calculating intermittent improved subsurface pipe drainage flow in the absence of surface water was given.Field experiments were combined with HYDRUS numerical simulations to verify the results,and the flow proportion of each part in the drainage process was analyzed.The results show that the theoretical calculation method for intermittent improved subsurface pipe flow is reasonable and feasible,and the average relative error be-tween the theoretical calculation and the measured value and the simulated value is 6.97％and-2.84％,respec-tively.With the increase in drainage time,the proportion of internal drainage flow to total flow in the cylindrical sand filter gradually decreased,while the proportion of external inlet flow to the total flow continuously increased.The higher the cylindrical sand filter material is,the longer the internal drainage duration is,the smaller the spac-ing of the cylinder sand filter material,the greater the proportion of the sum of internal drainage and external inlet flow to the total flow.The discontinuous improved method for calculating subsurface pipe drainage flow is suitable for both loam and silt.The research results provide ideas and references to enrich the drainage theory of agricultural land and the construction of subsurface pipe projects.关键词
间断式改进暗管排水/柱体砂滤料/排水流量/HYDRUSKey words
intermittent improved subsurface pipe/cylinder sand filter/drainage flow/HYDRUS分类
农业科技引用本文复制引用
金铭锐,陶园,王少丽,管孝艳..间断式改进暗管排水流量的计算方法[J].水利学报,2025,56(2):205-215,11.基金项目
国家重点研发计划项目(2021YFD1900600) （2021YFD1900600）
北京市科协青年人才托举工程项目(BYESS2023198) （BYESS2023198）
