西北工程技术学报2025，Vol.24Issue(3)：193-199,7.
浅埋暗管排水条件下土壤水盐运移渗流槽模型试验
Model Test of Soil Water and Salt Transport in a Seepage Tank Under Shallow Buried Pipe Drainage
摘要
Abstract
This study investigates the effects of shallow buried subsurface pipe drainage on soil salinization.A custom-designed large-scale seepage tank model test was employed to examine the transport mechanisms of soil water and salts under these conditions.Soil samples were collected from a newly established underground drainage project in the Yinbei Irrigation District of Ningxia.The suction pipe was positioned at a depth of 0.925 m(measured from the soil surface in the tank).Real-time monitoring of soil moisture and electrical conductivity was conducted using sensors during the irrigation process,allowing for the observation of soil water and salt migration in the irrigation area throughout the winter irrigation period.Post-leaching analyses indicated that the average moisture content in the 0-30 cm soil layer was 21.56 cm3/cm3,with soil electrical conductivity decreasing from 6.76 mS/cm prior to leaching to 0.80 mS/cm,achieving a desalination rate exceeding 85%.The average moisture content in the 30-60 cm soil layer was 24.25 cm3/cm3,with conductivity decreasing from 6.20 mS/cm to 2.23 mS/cm,corresponding to a desalination rare of 64%.For the 60-90 cm soil layer,the average moisture content was 24.71 cm3/cm3,with conductivity dropping from 5.97 mS/cm to 2.72 mS/cm,resulting in a desalination rate of 54%.Due to the characteristics of the seepage tank test and the depth of the buried pipe,the moisture content in the 90-110 cm soil layer was higher,with an average moisture content of 26.96 cm3/cm3.The electrical conductivity in this layer decreased from 7.41 mS/cm to 4.67 mS/cm,with a desalination rate of approximately 37%.关键词
暗管排水/渗流槽模型/水盐运移/浅埋方式/盐碱化治理Key words
subsurface pipe drainage/seepage tank model/water and salt transport/shallow burial mode/salinization treatment分类
农业科技引用本文复制引用
马俊毅,王红雨,唐少容,王思成..浅埋暗管排水条件下土壤水盐运移渗流槽模型试验[J].西北工程技术学报,2025,24(3):193-199,7.基金项目
宁夏自然科学基金重点项目(2021AAC02006) （2021AAC02006）
国家自然科学基金项目(41462010) （41462010）
宁夏自然科学基金项目(2021AAC03021). （2021AAC03021）
