[1]WU Lei,MU Xingmin,GAO Peng,et al.Effects of Vegetation Coverage on Runoff and Sediment Yield in the Loess Plateau[J].Research of Soil and Water Conservation,2019,26(06):133-138,144.
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Effects of Vegetation Coverage on Runoff and Sediment Yield in the Loess Plateau
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 06
Page number:
133-138,144
Column:
Public date:
2019-10-17
- Title:
- Effects of Vegetation Coverage on Runoff and Sediment Yield in the Loess Plateau
- Keywords:
- the Loess Plateau; vegetation coverage; runoff reduction benefit; sediment reduction benefit
- CLC:
- S157
- DOI:
- -
- Abstract:
- In order to study the effect of different vegetation coverage on runoff sediment yield in loess plateau. Through literature search, a total of 158 sets of valid data were collected from 30 related literatures. The system integration analysis method was used to study the variation of runoff and sediment reductions with different vegetation covers. The results show that:(1) under indoor and outdoor artificial simulated rainfall conditions, the yields of the runoff and sediment gradually decrease with the increase of coverage, the runoff reduction benefit by vegetation increases first and then decreases with the increase of coverage; at low coverage (0~40%), the runoff reduction benefit by vegetation is low; the flow reduction benefit also reduced when the coverage is high; the sediment reduction benefit of vegetation has been increasing with the increase of coverage, and its sediment reduction benefit is greater than the runoff reduction benefit; (2) the runoff and sediment reduction benefit changes follow the logarithmic function (y=alnx+b) with the increase of coverage, and the graph has the characteristics with starting to grow fast, and when it reaches a certain value, the growth slows down and tends to be stable; (3) the effective coverage of vegetation in the Loess Plateau is between 40%~50%, and the critical coverage is 70%~80%. Therefore, the initial coverage of vegetation construction in the Loess Plateau should reach an effective coverage of 40%~50%. In the subsequent vegetation restoration process, the vegetation coverage should be maintained at 70%~80%, so that the vegetation can play the role of maximum water storage and soil preservation. This study can provide the scientific basis for vegetation construction and ecological restoration in the region of the Loess Plateau and a reference for regional scientific vegetation arrangement measures.
- References:
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1900-01-01