[1]LIU Jigen,ZHANG Xinchuan,LI Li,et al.Research of Effect of Vegetation Coverage on Soil and Water Loss in Purple Soil Slope Land[J].Research of Soil and Water Conservation,2015,22(03):16-20,27.
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Research of Effect of Vegetation Coverage on Soil and Water Loss in Purple Soil Slope Land
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 03
Page number:
16-20,27
Column:
Public date:
2015-06-28
- Title:
- Research of Effect of Vegetation Coverage on Soil and Water Loss in Purple Soil Slope Land
- Keywords:
- purple soil; vegetation; coverage; soil and water loss
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- Vegetation is the positive factor preventing ground soil and water loss, but the research of effect of vegetation on soil and water loss is still very weak in purple soil in the Three Gorges Reservoir area. Artificial rainfall simulation experiment was used to analyze the effects of different grass coverage on runoff and sediment in purple soil slope land, quantitatively study the benefits of reducing runoff and sediment under different grass coverage. The results showed that the runoff flow decreased with increase of grass coverage, and it was particularly significant under small rainfall intensity. Especially when vegetation coverage was greater than 60%, the runoff volumes were significantly lower than those of bare land, the lands with 20% and 40% of vegetation coverage. The higher vegetation coverage is, the more obvious that reducing runoff and sediment yield, and the lower the sediment concentration is. Compared with grass-reduced sediment, it was obviously weaker for reducing runoff, and it was not clear that the effect of vegetation coverage on characteristic value of reducing runoff. The benefits of vegetation-reduced runoff and sediment increased with rise of rainfall under small and medium rainfall intensities, on the contrary, under the big rainfall intensity, the benefits of reduction of runoff and sediment declined.
- References:
-
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