[1]GAO Ruxue,GAO Huaduan,SONG Jiangping,et al.Influence of Slope Length on Soil Erosion in Yellow Sloping Farmland of Karst[J].Research of Soil and Water Conservation,2018,25(02):53-57.
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Influence of Slope Length on Soil Erosion in Yellow Sloping Farmland of Karst
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 02
Page number:
53-57
Column:
Public date:
2018-04-03
- Title:
- Influence of Slope Length on Soil Erosion in Yellow Sloping Farmland of Karst
- CLC:
- S157;P931.5
- DOI:
- -
- Abstract:
- This article studies the change rule of soil erosion and sediment yield with the slope length according to the monitoring data of soil and water conservation monitoring from runoff plots with the slope lengths of 5, 10, 15, 20 and 25 meters in Shiqiao small watershed in Bijie District in Guizhou Province. The results show that the annual runoff depths of slope surface in Karst sloping farmland decrease first, then increase and decrease later with the increase of slope length; when the rainfall is less than 30 mm, runoff depth increases first and then decreases with the increase of slope length; when the rainfall is greater than 30 mm, runoff depths decrease first, then increase and decrease later; the average soil erosion modulus within a year presents the linear function (R2=0.9217); when the rainfall is less than 30 mm, soil erosion modulus shows a trend of first sharp increasing and then decreasing, the peak value appears on the slope with length of 10 m; when the rainfall is greater than 30 mm, soil erosion modulus within a year also presents a linear function (R2=0.9146); under the condition of maximum thirty-minute rainfall intensities of 25 mm/h and 41.4 mm/h, the runoff depth decreases first, then increases and decreases later, and the soil erosion modulus increases first and then decreases with the increase of slope length.
- References:
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1900-01-01