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Study on the facilities and procedures for meltwater erosion of thawed soil

International Soil and Water Conservation Research 2016年第2期4卷 142-147页

作者： Yunyun Ban Tingwu Lei Chao Chen Zhiqiang Liu China Agricultural University Beijing 100083PR China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationCAS and MWRYangling 712100PR China

High erosion rate of seasonal thawed soils by snow-and ice-melting runoff in the high altitude and latitude cold regions has great impacts on ecological systems,industries,agriculture and various manmade infrastructures as well as people's *** facilities and procedures are of great importance for the studies on simulating erosion processes of melt-frozen *** study focuses on the method and facility for simulating the thawing process of frozen *** facility includes soil freezing system,meltwater supply system and experimental flume system for thawed soil *** soil freezing system provides enough space to freeze soil columns in *** water supply system deliveries snow-or icemelting water flow of constant-rate at 0℃.The soil flumes of 200 or 300 cm long,10 cm wide and 12 cm high are designed to be assemble and convenient for soil freezing before they are thawed in one-dimensional manner from top to *** one-dimensional thawing process is realized as *** frozen soil flume is put on ice boxes and thermally insulated with heat-insulating materials all around to prevent frozen soil from being thawed from sidewalls and *** soil thaws with this system shows that it can meet the requirements of simulating the process of soil thawing from top to *** thawed soil flumes are connected from end to end to form rills of 6–8 m long to run the erosion experiments under different designed hydraulic *** equipment provides facility,method and operation process for simulating one-dimensional soil thawing to serve research on the effect of thawed soil depth on erosion process.

关键词： melt-frozen Soil erosion Method Facilities Procedures

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