[1]WEI Guanju.Analysis on Spatiotemporal Change of Potential Risk of Soil Erosion in the Source Region of the Beiluo River from 2000 to 2013[J].Research of Soil and Water Conservation,2017,24(04):168-173,181.
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Analysis on Spatiotemporal Change of Potential Risk of Soil Erosion in the Source Region of the Beiluo River from 2000 to 2013
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 04
Page number:
168-173,181
Column:
Public date:
2017-08-28
- Title:
- Analysis on Spatiotemporal Change of Potential Risk of Soil Erosion in the Source Region of the Beiluo River from 2000 to 2013
- Keywords:
- soil erosion; multicriteria evaluation method; land cover type; fractional vegetation coverage; slope; Grain for Green Project
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- The objective of this study is to assess the water erosion risk and dynamic change trend of spatial distribution in erosion status and intensity, analyze the effects of vegetation variation on erosion risk, and obtain the conservation priority map between 2000 and 2013 in the source region of the Beiluo River using a multicriteria evaluation method based on land cover types, fractional vegetation coverage and slope derived from Landsat7 ETM+ image in 2000, Landsat8 OLI image in the 2013 and DEM data. The results show that: (1) the area of region with unchanged erosion risk is the largest, and the area proportion (31.97%) of region with decreasing erosion risk is larger than that (16.05%) of region with increasing erosion risk, the region with moderate risk is more stable than the area with other risk-level; (2) with the degree of variation of erosion risk getting greater, the area of region with corresponding variation degree of erosion risk will become less; (3) the area proportions of regions affected by improving natural vegetation cover and by abandoning farmland in the region with decreasing trend of erosion risk are 42.8% and 57.2%, respectively, and the area proportions of regions affected by improving natural vegetation cover and by farming in the region with increasing trend of erosion risk are 93.7% and 6.3%, respectively. The area affected by land cover change get larger and the area affected by natural vegetation coverage get smaller as the level of erosion risk get higher.
- References:
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1900-01-01