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[1]MU Tian-long,XIE Jing,WU Jian-sheng,et al.Effects of Land Use on Soil Erosion in Shenzhen, China[J].Research of Soil and Water Conservation,2010,17(03):53-58.

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Effects of Land Use on Soil Erosion in Shenzhen, China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 03 Page number: 53-58 Column: Public date: 2010-06-20

Title:: Effects of Land Use on Soil Erosion in Shenzhen, China

Author(s):: MU Tian-long¹, XIE Jing^1,2, WU Jian-sheng¹, WANG Xiu-ru², ZHENG Mao-kun³; 1. The Key Laboratory for Environmental and Urban Sciences, Shenzhen Graudate School, Peking University, Shenzhen, Guangdong 518055, China;
2. Water and Soil Conservation School, Beijing Forestry University, Beijing 100083, China;
3. School of Urban and Environmental Sciences, Peking University, Beijing 100871, China

Keywords:: land use; soil erosion; RUSLE; composite index of soil erosion intensity

CLC:: S157.1;F301.24

DOI:: -

Abstract:: This paper calculates soil erosion in Shenzhen based on GIS and RUSLE, classifies it in accordance with standards of urban soil erosion, introduces and amends the composite indexes of soil erosion intensity and regional soil erosion intensity in order to analyze the spatial relationships between land use and soil erosion. Several data, including land use distribution, the rainfall records, soil type distribution, the landforms, are used in this paper. The land use types can be classified into 10 types: paddy field, cultivated lands, orchard, bush, forest, grassland, construction site, mining field, unused land and urban area on the basis of common classification standards. In this paper, 30×30 meters is chosen as the basic pixel size. RUSLE consists of six factors-rainfall-runoff erosivity factor, soil erodibility factor, slope length factor, slope steepness, cover-management factor and support practice factor. These six factors give the total soil loss, which comes to 1 733.23 t/(hm²·a) on average. The composite indexes of soil erosion intensity and regional soil erosion intensity are employed to discuss how much land use affects soil erosion, the degree of which is represented by a series of indexes. The results are as follows: three land use types which are most likely to cause soil erosion are mining, unused land and building sites (razed ground included); three land-use types which are most likely to retain soil are forest, grassland and paddy fields; agricultural land-use type which is most likely to cause significant soil erosion is the orchard; Nanshan District and Longgang District are the key districts in which to improve soil and water conservation.

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