排灌机械工程学报
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排灌机械工程学报  2018, Vol. 36 Issue (8): 668-672    DOI: 10.3969/j.issn.1674-8530.18.1196
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压砂条件下水分一维垂直入渗试验研究
魏童1, 谭军利1,2,3*, 葛敏1, 马中昇1
1.宁夏大学土木与水利工程学院, 宁夏 银川 750021; 2.旱区现代农业水资源高效利用教育部工程研究中心, 宁夏 银川 750021; 3.宁夏节水灌溉与水资源调控工程技术研究中心, 宁夏 银川 750021
One-dimensional vertical infiltration of water under gravel fragments condition
WEI Tong1, TAN Junli 1,2,3*, GE Min1, MA Zhongsheng1
1.Civil and Hydraulic School, Ningxia University, Yinchuan, Ningxia 750021, China; 2.Engineering Research Center of the Ministry of Education for Modern Agricultural Water Resources High Efficiency in Arid Areas, Yinchuan, Ningxia 750021, China; 3.Enginee-ring and Technology Research Center of Water-saving and Water Resources Regulation in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
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摘要 为研究压砂对土壤水分垂直入渗规律的影响,选取沙土和壤土这2种土壤作为研究对象,采用土柱试验模拟压砂条件下沙土和壤土的水分入渗垂直运动的影响规律,并分别设置2种土壤无压砂处理的对照试验,分析压砂对2种土壤的水分入渗垂直运动的影响规律.结果表明:压砂提高了包含砂层在内的土壤入渗能力,但抑制了砂层下土壤的入渗性能;通过函数拟合得到了累积入渗量随入渗时间变化的经验方程式,拟合程度较高;压砂条件对土壤初渗速率有较大影响,压砂条件下的沙土的初渗速率为不压砂的1.67倍,壤土为2.37倍,压砂对壤土初渗速率影响更为明显;稳渗速率均较小,且压砂对2种土壤的稳渗速率无明显影响;压砂对2种土壤的湿润深度随累积入渗量的变化均起到抑制作用,且对壤土抑制作用更强,2种土壤去除砂层影响后土层的湿润锋深度与累积入渗量的关系均近似呈线性规律.
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魏童
谭军利
*
葛敏
马中昇
关键词压砂   土壤水分   累积入渗量   入渗速率   湿润锋     
Abstract: In order to study the effect of sand press on the vertical infiltration law of soil moisture, sandy and loam soils were selected as the research object. The soil column experiment was used to simulate the effect of sand and loam on the vertical movement of water infiltration under sand pressure. We set separately two kinds of soil without pressure sand control test and analyzed the effect of sand pressure on the vertical movement of water infiltration of two kinds of soil. The results show that gravel fragments improve the infiltration capacity of the soil including the sand layer, but inhibit the infiltration performance of the soil under the sand layer. The empirical equation between cumulative infiltration and infiltration time that is obtained through function fitting has a great degree of synergy. Sand pressure conditions have a greater impact on the initial infiltration rate of the soil. The initial infiltration rate of sandy soil under pressure sand conditions is 1.67 times that of non-pressure sand and 2.37 times that of loam, and the effect of sand pressure on the infiltration rate of loam is even greater. Obviously, stable infiltration rate is small, and sand pressure has no obvious effect on the infiltration rate of the two soils. Sand pressure can inhibit the depth of the two soils with the change of cumulative infiltration, and the inhibitory effect on the loam is stronger. The relationship between the depth of the wetting front and the cumulative infiltration of both soils after removal of the sand layer is approximately linear.
Key wordssand press   soil moisture   cumulative infiltration   infiltration rate   wetting front   
收稿日期: 2018-05-15;
基金资助:

国家自然科学基金资助项目(51309135,31460546);宁夏高等学校一流学科建设(水利工程)资助项目(NXYLXK2017A03)

引用本文:   
魏童,谭军利,*等. 压砂条件下水分一维垂直入渗试验研究[J]. 排灌机械工程学报, 2018, 36(8): 668-672.
WEI Tong-,TAN Jun-Li-,* et al. One-dimensional vertical infiltration of water under gravel fragments condition[J]. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(8): 668-672.
 
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