采用一维水平入渗试验测定古尔班通古特沙漠南缘丘间地风沙土渗透系数

发布时间：2018-06-06 22:39

本文选题：水平入渗 + 渗透系数　；参考：《干旱区地理》2017年04期

【摘要】：通过室内土壤水平一维入渗试验,测定了不同入渗水头作用下不同入渗时间对应的累计入渗量和湿润锋长度,分析了累计入渗量与湿润锋长度、累计入渗量与入渗时间平方根的关系,探讨了采用不同入渗水头作用下的水平入渗试验测定古尔班通古特沙漠南缘丘间地风沙土渗透系数的适用性。研究结果表明:累计入渗量与湿润锋长度呈显著的线性关系;累计入渗量与入渗时间平方根呈显著的线性关系,Philip公式较好地反映了不同入渗水头作用下的水平入渗特点;采用水平土柱入渗试验测定古尔班通古特沙漠南缘丘间地风沙土渗透系数是可行的。研究结果可为干旱区风沙土水力学研究提供参数,为推求风沙土水动力学参数的方法选择提供理论参考。
[Abstract]:The accumulative infiltration amount and wetting front length corresponding to different infiltration time under different infiltration water head were measured by one-dimensional infiltration test at indoor soil level, and the accumulative infiltration amount and wetting front length were analyzed. The relationship between the cumulative infiltration amount and the square root of infiltration time is discussed. The applicability of horizontal infiltration test under the action of different infiltration heads to determine the permeability coefficient of wind-blown sand soil in the southern margin of Guerbantungute Desert is discussed. The results show that there is a significant linear relationship between the cumulative infiltration amount and the length of the wetting front, and there is a significant linear relationship between the cumulative infiltration amount and the square root of the infiltration time. It is feasible to use the horizontal soil column infiltration test to determine the permeability coefficient of the sandy soil between the dunes in the southern margin of the Gulban Tungut Desert. The results can provide parameters for the study of hydrodynamics of wind-sand soil in arid area and theoretical reference for the selection of hydrodynamic parameters of wind-sand soil.
【作者单位】：中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室;中国科学院大学;中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室;
【基金】：国家基础研究发展计划项目(2013CB429905) 国家自然科学基金项目(41671032,U1303181,41371011,41601107)
【分类号】：S152.72

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