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[1]Yi Qiang,Li Yuemei,Yan Junfei,et al.Effects of Different Land Uses on Runoff and Sediment on Sloping Land in Loess Hilly Area of Western Henan[J].Research of Soil and Water Conservation,2024,31(04):67-74,85.[doi:10.13869/j.cnki.rswc.2024.04.030]

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Effects of Different Land Uses on Runoff and Sediment on Sloping Land in Loess Hilly Area of Western Henan

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 04 Page number: 67-74,85 Column: Public date: 2024-06-30

Title:: Effects of Different Land Uses on Runoff and Sediment on Sloping Land in Loess Hilly Area of Western Henan

Author(s):: Yi Qiang¹, Li Yuemei², Yan Junfei³, Gu Zhijia², Zhang Hongfeng³, Li Panying¹, Huang Shuping²; (1.Soil and Water Conservation Monitoring Station of Henan Province, Zhengzhou 450008, China; 2.College of Geographic Sciences/Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, Xinyang Normal University, Xinyang, Henan 464000, China 3.Songxian Soil and Water Conservation Institute of Henan, Songxian, Henan 471400, China)

Keywords:: runoff and sediment yield; runoff plot; land use; loess hilly area of western Henan

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2024.04.030

Abstract:: [Objective]The aims of this study are to analyze the runoff and sediment under different land use types and slopes in the loess hilly area of western Henan, and to provide scientific basis for quantitative evaluation of soil erosion and comprehensive prevention of soil erosion. [Methods]Based on the observation data of 12 runoff plots from 2011 to 2020 at the monitoring site of soil and water conservation in Hugou small watershed, Songxian County, Henan Province, the pattern of runoff and sediment under different land use was revealed. Correlation analysis was used to detect the relationship between rainfall characteristics, slope, land use, runoff and sediment yield. [Results](1)Compared with bare land plot, grassland plot had the greatest effect on runoff and sediment reduction. The average annual runoff reduction effect of grassland was 78.6%～85.9%, and the maximum sediment reduction effect was 100%. The runoff reduction effect of forestland was 32.9%～51.3%, and the sediment reduction effect was 55.3%～78.9%.(2)Runoff and sediment in each runoff plot and the slope were closely related. There was no significant difference between the runoff and sediment on the slopes of 10° and 15°, however, it increased significantly on the slope of 25°. In addition, with the increase of slope gradient, the soil and water conservation effect of forestland and grassland also reduced.(3)The correlation between runoff depth and maximum 30-minute rainfall intensity(I₃₀)and soil loss and rainfall erosivity were the most significant. [Conclusion]In areas where runoff and sediment localization observation is lacking in the loess hilly region of western Henan Province, rainfall process information can be used to estimate the runoff and soil loss under certain slope and vegetation conditions.

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Last Update: 2024-06-30