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[1]SU Yuanyi,CHEN Tianqing,ZHANG Panpan,et al.Study on Erosion Process Characteristics of Frozen Soil Slope in Loess Hilly Region[J].Research of Soil and Water Conservation,2022,29(06):1-7.

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Study on Erosion Process Characteristics of Frozen Soil Slope in Loess Hilly Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 06 Page number: 1-7 Column: Public date: 2022-10-20

Title:: Study on Erosion Process Characteristics of Frozen Soil Slope in Loess Hilly Region

Author(s):: SU Yuanyi^1,2,3,4, CHEN Tianqing^1,2,3, ZHANG Panpan^1,2,3, XIONG Yufei^1,2,3, LI Peng⁴; (1.Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Shaanxi Provincial Land Engineering Construction Group, Xi'an 710075, China; 2.Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Shaanxi Provincial Land Engineering Construction Group, Xi'an 710075, China; 3.Land Engineering Technology Innovation Center, Ministry of Natural Resources, Shaanxi Provincial Land Engineering Construction Group, Xi'an 710075, China…)

Keywords:: Loess Hilly Region; frozen soil slope; erosion process; water sediment relationship

CLC:: S157.1

DOI:: -

Abstract:: In order to explore the differences in erosion between unfrozen slope and frozen slope under different runoff slope lengths in the Loess Hilly Region, simulated freezing and water discharge scouring tests were carried out indoors. Three runoff slope lengths(2 m, 4 m and 6 m)and two slope types(unfrozen slope and frozen slope)were used to quantitatively study the runoff and sediment yield process and water sediment relationship between unfrozen slope and frozen slope. The results show that:(1)The initial flow production time of both unfrozen slopes and permafrost slopes decreases with the extension of runoff slope length, and the initial flow production time of permafrost slopes decreases compared with unfrozen slopes under the same runoff slope length;(2)The average flow production, the average sand production on unfrozen slopes and the average sand production on frozen slopes both increase with the extension of runoff slope length, while the average flow production on frozen slopes does not differ significantly with the change of runoff slope length.(3)The relationship between flow production rate and sand production rate on unfrozen slopes is divided into two stages: slow and rapid increase, while sand production rate on frozen soil slopes increases with the increase of flow production rate.(4)There is a positive correlation between cumulative flow production and cumulative sand production, and the absolute value of parameter c is proportional to the runoff slope length, and is greater on the frozen slope than on the unfrozen slope. The freezing of soil shortens the initial flow production time significantly, and the increase in runoff volume is accompanied by the continuous melting of frozen soil leading to increased erosion on the frozen slope.

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Last Update: 2022-10-20