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[1]WEN Yunhao,WANG Lixin,LIU Tiejun.Process of Runoff and Sediment Generation on Different Slopes with Ridged Cropping in the Black Soil Area of Northeast China[J].Research of Soil and Water Conservation,2022,29(05):8-13,20.

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Process of Runoff and Sediment Generation on Different Slopes with Ridged Cropping in the Black Soil Area of Northeast China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 05 Page number: 8-13,20 Column: Public date: 2022-08-20

Title:: Process of Runoff and Sediment Generation on Different Slopes with Ridged Cropping in the Black Soil Area of Northeast China

Author(s):: WEN Yunhao¹, WANG Lixin¹, LIU Tiejun²; (1.College of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China; 2.Institute of Pastoral Water Conservancy Science, Ministry of Water Resources, Hohhot 010020, China)

Keywords:: black soil; ridged cropping measures; scouring; runoff; sediment

CLC:: S157

DOI:: -

Abstract:: Ridged planting is a common cropping pattern in the black soil area of northeast China, and the runoff and sediment generation patterns on different slopes with ridged cropping are not clear and need to be studied. Based on the field scouring test, three drainage flow rates(30 L/min, 60 L/min, 90 L/min)and four slopes(cross-slope ridge, slope ridge, no ridge, and down-slope ridge)were designed to investigate the differences in soil erosion on different slopes with ridged cropping in the northeast black soil area. The results show that:(1)the runoff generation rate and sediment content of the three kinds of scouring flows both showed a continuous fluctuation trend with the change of ridged cropping measures, but the change patterns of the two were different by the scouring flow;(2)under the four ridged cropping conditions, the time of runoff generation was not correlated with the drainage flow, and the sediment content was negatively correlated with the time of runoff generation; under the other test conditions, different correlations were observed due to the differences in drainage flow and ridged cropping measures;(3)at the drainage flow rates of 30 L/min and 60 L/min, the erosion intensity decreased in the order: downhill ridge>no ridge>slope ridge>cross-slope ridge; when the drainage flow rate was 90 L/min, the erosion intensity decreased in the order: cross-slope ridge>down-slope ridge>slope ridge>no ridge. And the cumulated amounts of sediment generation of cross-slope ridge and slope ridge increased 12.78 times and 10.11 times, respectively compared with those under drainage flow rate of 30 L/min. Under the condition of small flow erosion, horizontal ridge and oblique ridge can effectively control runoff and soil erosion, and when the erosion intensity increases, the fracture of the two ridges is the most important factor in the variation of runoff and sediment.

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Last Update: 2022-08-20