Results 11 to 20 of about 192 (145)
Shuitu Baochi Xuebao, 2007 以室内试验为基础，测定了重壤土、中壤土、砂壤土在不同滴头流量、不同灌水量下的滴灌交汇土壤水分入渗运动过程。研究结果显示了滴头流量、灌水量和土壤质地对交汇入渗湿润体形状的影响规律。滴灌入渗交汇界面的湿润锋水平和垂直距离与入渗时间之间符合良好的线性关系，湿润锋水平和垂直速度随着交汇时间的延长而增大。随着距滴头距离的增加，滴灌交汇入渗湿润体内的土壤含水率降低，湿润锋交汇界面处的土壤含水率一般均大于同等土壤深度的含水率。研究结果对滴灌系统设计理论具有一定的指导作用。
孙海燕, 王全九
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The response of hydraulic conductivity to air-trapped saturation in a dissolution process of trapped-air in quasi-saturated fine sands media [PDF]
The hydraulic conductivity of a quasi-saturated aquifer decreases with the increase of air-trapped saturation, but it is difficult to obtain a continuous data on air-trapped saturation through the traditional displacement experiments due to limitations ...
Donghui CHENG +8 more
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Analysis on factors controlling shallow failures of the cut slopes and its prevention by bio-engineering measures: A case study of the cut slopes along the highway from Shuangcheng to Dajiali [PDF]
Understanding the primary and secondary relations of influencing factors is crucial for predicting deformation and controlling collapse in cutting slopes. Using a cutting slope along the Shuangcheng to Dalijia expressway in Gansu Province as the research
Changgen YAN +4 more
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Analysis of soaking deformation characteristics of large-thickness discontinuous collapsible loess [PDF]
Objective The unique stratigraphic structure of the widely distributed discontinuous loess stratum in the Guanzhong Plain area of China results in significant differences between the indoor calculated values and field-measured values of the self-weight ...
HUI Hanbin +3 more
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Seepage characteristics of accumulation landslides under different types of heavy rainfall stability analysis [PDF]
Heavy rainfall is a major causes of sedimentary landslide disasters, and understanding the spatiotemporal dynamic characteristics of the seepage field in landslides under heavy rain is crucial for evaluating landslide stability and providing ...
Hao SHI +5 more
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Shuitu Baochi Xuebao, 2022 水中带沙是浑水灌溉较清水灌溉的本质区别, 为揭示浑水灌溉的节水减渗机制, 通过浑水膜孔灌自由入渗室内试验, 以清水入渗为对照, 研究了浑水膜孔灌入渗能力、湿润锋运移距离、湿润体含水率、致密层土壤颗粒组成及落淤层厚度等随入渗时间的变化规律, 提出了土壤含水率与湿润锋运移距离之间的量化模型, 分别建立了落淤层厚度与入渗时间、滞留层的滞留量与滞留深度之间的关系。结果表明: 浑水泥沙对土壤水分入渗的影响较大, 在入渗结束时浑水较清水的累积入渗量减幅达27.83%;土壤含水率从膜孔中心到湿润锋面逐渐减小 ...
钟韵 +6 more
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Progress Analysis and Development Prospects of Soil Ecological and Environmental Effects of Interlayer Construction [PDF]
[Objective] This study systematically summarized and analyzed the current application status, technical characteristics, and environmental benefits of interlayer construction in soil improvement, nutrient cycling, ecological restoration, and crop ...
CHEN Jihong +7 more
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Shuitu Baochi Xuebao, 2020 为探究不同浑水含沙率对层状土入渗特性的影响，通过室内膜孔灌自由入渗试验，研究了以夹砂层位置为5~10 cm的层状土条件下清水和不同含沙率的浑水（2%，5%，7%，9%）入渗的累积入渗量、湿润锋运移规律以及湿润体内土壤含水量分布情况，分别建立了层状土不同含沙率浑水膜孔灌入渗量、湿润锋运移距离与入渗时间之间的关系；提出了基于清水入渗的不同浑水含沙率单位膜孔面积累积入渗量模型。结果表明：不同浑水含沙率累积入渗量变化趋势一致，但含沙率越大，累积入渗量越小，浑水减渗作用越明显，对应入渗系数越小，入渗指数越大 ...
白瑞, 费良军, 陈琳, 钟韵
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Shuitu Baochi Xuebao, 2017 为了探究涌泉根灌水肥一体化灌溉在不同土壤初始含水率下水氮运移特性，通过室内肥液入渗试验，研究了不同土壤初始含水率(4.13%，7.21%，8.77%，11.06%，14.01%)条件下累积入渗量的入渗特性、湿润锋运移、土壤水分以及铵态氮和硝态氮的运移特性，建立了涌泉根灌累积入渗量、各向湿润锋运移距离与不同土壤初始含水率之间的关系，提出了不同初始含水率下涌泉根灌累积入渗量、各向湿润锋运移距离的经验模型。结果表明：累积入渗量、各向湿润锋运移距离以及湿润体内水分和氮素的分布 ...
刘 显 +5 more
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Shuitu Baochi Xuebao, 2005 分析了土壤容重和气阻对一维垂直积水入渗的入渗率、累积入渗量以及湿润锋的影响,并对入渗过程中土壤平均含水率增量进行了研究。容重和气阻均对入渗率、累积入渗量和湿润锋有明显的影响:容重增加导致累积入渗量减少的减渗率在入渗过程中为一常数,相对于容重为1.3g/cm3土壤的累积入渗量,容重为1.4g/cm3和1.5g/cm3土壤的减渗率分别为31.79%和52.03%。容重增加导致湿润锋减少的减渗率在入渗过程中并非一常数,受到了入渗时间的影响;气阻导致累积入渗量和湿润锋减少的减渗率随基准入渗量的增加而变大 ...
张振华 谢恒星 刘继龙 蔡焕杰
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