Abstract
Abstract. Soil erosion is one of major environment problems in the world, and China is one of the most serious soil erosion country. In this paper, Fujian province was used as a study area for its typical red soil region. Based on USLE model, the soil erosion modulus in 1990 and 2015 were calculated and turned to soil erosion intensity. The soil erosion distribution trend in Fujian province was decrease from south-east coastal zone to north-west inland region. In soil erosion areas, the main erosion type was light level with about 80 %, and the soil erosion levels above serious type were mainly sporadic distribution with less than 10 %. The soil erosion improved for the past 25 years. The areas of different erosion types all decreased, and the total erosion area reduced by 26.59 %. The improvement area mainly located in north-east, south and west region. The aggravation area mainly located in the north and some middle hilly regions. The impact of human activities is more significant for erosion control.
Highlights
Soil erosion is one of major environment problems in the world, and contributes about 85% of total global land degradation (Lin, et al, 2013)
The USLE model was used for the estimation of soil erosion in Fujian province, which was closely related to six factors: A=R∙K∙L∙S∙C∙P
The monthly precipitation is different in different years, and the vegetation coverage changes every year
Summary
Soil erosion is one of major environment problems in the world, and contributes about 85% of total global land degradation (Lin, et al, 2013). It breaks down land resources and gives rise to some significant environmental disasters, such as deposition, drought and flood, and directly affects the sustainable development of regional ecological and social environments, exerting a dramatic influence on human habitat and economic development. Various models have been proposed to estimate soil erosion Despite their shortcomings and limitations, the USLE (Wischmeier and Smith,1978) and RUSLE (Renard et al, 1997) are still the most frequently used equations for estimation of soil erosion. USLE and RUSLE have been applied to various spatial scales and region sizes in different environments worldwide (Gericke, 2015; Ali and Hagos, 2016; Karamage, et al, 2016; Jiang, et al, 2016; Lin et al, 2016)
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