挡水埂对弃土场雨水资源利用的影响研究  

Study on the Influence of Water Blocking Ridge on Utilization of Rainwater in Spoil Ground

作　　者：刘燕 周建海 Liu Yan;Zhou Jianhai(Gansu Science Institute of Soil and Water Conservation,Lanzhou,Gansu 730020,China)

机构地区：[1]甘肃省水土保持科学研究所,甘肃兰州730020

出　　处：《绿色科技》2022年第16期35-38,共4页Journal of Green Science and Technology

基　　金：甘肃省水利科学试验研究及技术推广项目(编号:甘水建管发[2020]46-4号)。

摘　　要：挡水埂是工程建设项目弃土场常用的水土保持工程措施,为研究挡水埂对弃土场土壤水分影响,选取中兰客专的3个弃土场,测定了雨季前后挡水埂内和挡水埂上的土壤含水率,并计算了挡水埂内相比挡水埂上土壤含水率的增长率,分析了挡水埂对工程建设项目弃土场雨水利用的影响。结果表明:弃土场土壤含水率均在雨季后大幅增加,增长幅度高达71.96%~128.72%;雨季前挡水埂内相比挡水埂上土壤含水率的变化幅度不大,雨季后挡水埂内相比挡水埂上土壤含水率的变化幅度较大,增幅为8.07%~13.67%,说明挡水埂可以有效地利用雨水资源,为弃土场的植被生长提供必要条件,在防治水土流失和水源涵养方面也有较好的作用。Water blocking ridge is commonly used water and soil conservation engineering measures for spoil sites in engineering construction projects.In order to study the impact of water blocking ridges on soil moisture in spoil sites,three spoil grounds of Yinchuan-Lanzhou High-speed Railway were selected to measure the water blocking ridges before and after the rainy seasons.The soil moisture content inside and on the water blocking ridge was calculated,and the growth rate of soil moisture content in the water blocking ridge compared with that on the water blocking ridge was calculated,and the impact of water blocking ridge on the utilization of rainwater in the spoil yard of the construction project was analyzed.The results showed that the soil moisture content of spoil ground increased greatly after the rainy seasons.In the arid Loess Plateau,the increase rate is as high as 71.96%~128.72%.Compared with the water blocking ridge,the soil moisture content in the ridge has a larger change range,with an increase of 8.07%~13.67%,indicating that the water blocking ridge can effectively utilize rainwater resources and provide necessary conditions for the growth of vegetation and soil field.It also plays a good role in preventing soil erosion and water conservation.

关 键 词：挡水埂 弃土场 土壤含水率 雨水资源 

分 类 号：S157[农业科学—土壤学]