[1]GUO Jianying,LI Jinrong,HE Jingli,et al.Analysis on Water Erosion Process Caused by Secondly Rainfall Under Different Slope Treatment Measures at Dump Site in Typical Steppe[J].Research of Soil and Water Conservation,2017,24(05):1-5,13.
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Analysis on Water Erosion Process Caused by Secondly Rainfall Under Different Slope Treatment Measures at Dump Site in Typical Steppe
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 05
Page number:
1-5,13
Column:
Public date:
2017-10-28
- Title:
- Analysis on Water Erosion Process Caused by Secondly Rainfall Under Different Slope Treatment Measures at Dump Site in Typical Steppe
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- At the beginning of the vegetation restoration, the slope erosion can reach up to moderate level due to the runoff generated by the first rainfall. In such condition, the sediment yield caused by secondly rainfall is 6 469 t/km2 in vegetation zone, which is 1.15 times of bare land (5 640 t/km2); however, the sediment yield under the measure of the eco-bag with ‘—’ type is just 45.1% of the bare land. With the increase of restoration duration, the eco-bag with ‘—’ type which is combined by biological and engineering measures is better than biological measures. For instance, in the third year, the annual runoff depth is less than that under the seven years of Sabina vulgaris + Spiraea sp. which is completely biological measure. When the vegetation coverage is more than 35%, the sediment yields in different treatment measures are less than those in the bare land; and with the increase of the rainfall intensity, the sediment control capacity of the combination of biological and engineering measures is better. Soil erosion amount under the measure of the eco-bag with ‘—’ type can decrease by from 5 179 t/(km2·a) (the first year) to 1 260.35 t/(km2·a) (the third year), the reduction is just 75.7%. In conclusion, combination of biological and engineering measures in the dump slope can control erosion effectively.
- References:
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1900-01-01