文章基本信息

标题：Rainfall-induced Soil Erosion and Sediment Sizes of a Residual Soil under 1D and 2D Rainfall Experiments
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作者：Khonesavanh Vilayvong ; Khonesavanh Vilayvong ; Noriyuki Yasufuku 等
期刊名称：Procedia - Social and Behavioral Sciences
印刷版ISSN：1877-0428
出版年度：2016
卷号：218
页码：171-180
DOI：10.1016/j.sbspro.2016.04.020
语种：English
出版社：Elsevier
摘要：AbstractRaindrop impact and surface flow trigger the downstream movement of soil particles by the processes of rainfall-induced soil erosion. A set of laboratory simulated rainfall experiments was carried out to study soil loss and size characteristics of discharged sediments of a soil under a rainfall intensity of 70mm/h, controlled initial soil suctions and moistures. The rainfall simulation was instrumented with tensiometers and moisture sensors. A new device capable of deriving impact force, velocity, and kinetic energy of a falling waterdrop was developed. Sediment sizes in runoff were characterized by a laser particle size analyzer in order to correlate with the properties of rainfall. 1D simulated rainfall experiments were also employed to study soil detachment and soil susceptibility to rainfall under both saturated and unsaturated soil conditions. The processes of soil erosion and outflow size characteristics of sediments relating to effect of suction were discussed. The proposed set of experiments will be a viable tool for measuring soil loss, sediment runoff, and sediment sizes discharged from a farmland pertaining to properties of rain, soil and flow.
关键词：Soil erosion;Soil erodibility;Sediment sizes;Drop impact force;Unsaturated soil ;