黄河泥沙复配土壤水分特征曲线分析  

Analysis of Water Characteristic Curve of Complex Soil Mixed with Yellow River Sediment

作　　者：陈洋 王晓彤[1] 梁宇生[1] 李星宇[1] CHEN Yang;WANG Xiao-tong;LIANG Yu-sheng;LI Xing-yu(Institute of Land Reclamation and Ecological Restoration,China University of Mining and Technology（Beijing）,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)土地复垦与生态重建研究所,北京100083

出　　处：《煤炭技术》2018年第10期26-28,共3页Coal Technology

基　　金：国家自然科学基金(41771542)

摘　　要：将采煤沉陷地表土、心土和黄河泥沙按不同复配比构成新土壤。通过压力膜法测定新土壤的水分特征曲线,并采用Gardner模型进行曲线拟合。结果表明:Gardner模型对各组水分特征曲线的拟合结果良好;各组水分特征曲线呈现低吸力段陡直、高吸力段缓平的特征。同时根据各组比水容重出现10-4数量级的先后顺序,对各组复配土壤在低、中、高3个吸力段下的当量孔径比进行对比分析。The new soil mixed with surface soil and subsoil coming from mining subsidence land and Yellow River sediment in different proportion.On this basis,the water characteristic curve of the new soil was determined by pressure-membrane method,and the data was used to fit the Gardner model.The results indicate that the fitted curve is in good agreement with the actual measurements,the water characteristic curve of each group decline rapidly in low suction condition and become smooth while suction growing.Then,according to the sequence of 10^-4 of specific water capacity,the equivalent pore diameter ratio of each compound soil was analyzed under the low,middle and high suction.

关 键 词：黄河泥沙 复配土壤 水分特征曲线 

分 类 号：S152[农业科学—土壤学]