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[1]WANG Yahui,WANG Wenrui,WANG Weiwei.Spatiotemporal Analysis of Soil Erosion in Shapotou Reserve in China[J].Research of Soil and Water Conservation,2015,22(01):11-16.

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Spatiotemporal Analysis of Soil Erosion in Shapotou Reserve in China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 01 Page number: 11-16 Column: Public date: 2015-02-28

Title:: Spatiotemporal Analysis of Soil Erosion in Shapotou Reserve in China

Author(s):: WANG Yahui, WANG Wenrui, WANG Weiwei; College of Earth and Environmental Sciences/Center for Climate Change and Hydrologic Cycle in Arid Region, Lanzhou University, Lanzhou 730000, China

Keywords:: soil and water conservation; water erosion; Chinese soil loss equation model; land cover; Shapotou

CLC:: S157

DOI:: -

Abstract:: The high intensity and short duration of the rainfall events in arid desert region would lead to acute erosion risk. This paper demonstrated the evolution of soil erosion by rainfall from 1990 to 2011 as a case of Shapotou National Nature Reserve of Ningxia that is located in edge of southeast of Tengger Desert. Based on the agrotype mapping, GDEM and Landsat TM data, the water erosion in the 1990, 2002 and 2011 years was evaluated by using Chinese soil loss equation model. Results showed that the water erosion module in Shapotou Reserve reached up to 39 066.02 t/(km²·a), which is considerable volume even though less than the wind erosion. From 1990 to 2002, the water erosion intensity remained almost stable, but from 2002 to 2011, the value dropped sharply, this evolution change indicated that the increased water, timber reforestation and farmland which were associated with human activities resulted in a lower density of water erosion. There were also significant spatial differences of water erosion in Shapotou Reserve, the value in the bare area, lower vegetation coverage area and the slope of 8°～25° was significantly higher than that in other areas.

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