[1]LIU Jiaxin,Liu Gang,Liu Puling.Measures and Mechanism to Prevent Water Loss and Soil Erosion on Multi-Stair Slope in Loess Area[J].Research of Soil and Water Conservation,2017,24(03):65-69.
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Measures and Mechanism to Prevent Water Loss and Soil Erosion on Multi-Stair Slope in Loess Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 03
Page number:
65-69
Column:
Public date:
2017-06-28
- Title:
- Measures and Mechanism to Prevent Water Loss and Soil Erosion on Multi-Stair Slope in Loess Area
- Keywords:
- loess steep slope; soil erosion; soil and water conservation
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- The new built multi-stair slope in gully of loess area is susceptible to soil erosion. We used the simulated rainfall experiment to examine the relation among soil and water conservation measures， rainfall intensity and the phenomenon of soil erosion on multi-stair slope in loess area and observed the development process of soil erosion. The results show that the extreme weather conditions (rainfall intensity 120 mm/h) and upslope runoff are two key factors leading to soil erosion on multi-stairs slope in loess area. When the rainfall intensities ranged between 60 mm/h~90 mm/h, the sediment yield rate influenced by the rainfall was stable. There was no obvious difference between phenomena of soil erosion and the slope without obvious damage. When the rainfall intensity was 120 mm/h the sediment yield rate rose quickly, the phenomenon of soil erosion was obvious. The reverse slope measure can effectively reduce the sediment yield by 58.4%, 35.2%, 62.1% and reduce the runoff by 69.6%, 26.6%, 60.8%, respectively, under the rainfall intensities of 60 mm/h, 90 mm/h and 120 mm/h. At the same time, the erosion rate decreased. Water test was used to simulate the slope without drain measures. The results show that drain measures can effectively reduce the sediment yield by 92.7%, and at the same time changed the development phenomenon of erosion, the drain measure turned the erosion phenomenon from rill erosion to sheet erosion. From the point of view of water and sediment reduction, the drain measures and reverse slope measures are both effective measures to prevent water loss and soil erosion on multi-stair slope in loess area.
- References:
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