黄土高原土壤侵蚀及其与降雨、植被变化的响应(英文)

编号 zgly0001585350

文献类型 期刊论文

文献题名 黄土高原土壤侵蚀及其与降雨、植被变化的响应(英文)

作者 孙文义  邵全琴  刘纪远 

作者单位 InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  UniversityofChineseAcademyofSciences 

母体文献 Journal of Geographical Sciences 

年卷期 2013年06期

年份 2013 

分类号 S157 

关键词 soilerosion  assessment  precipitation  vegetationcover  LoessPlateau 

文摘内容 Soil erosion is a major threat to our terrestrial ecosystems and an important global environmental problem. The Loess Plateau in China is one of the regions that suffered more severe soil erosion and undergoing climate warming and drying in the past decades. The vegetation restoration named Grain-to-Green Program has now been operating for more than10 years. It is necessary to assess the variation of soil erosion and the response of precipitation and vegetation restoration to soil erosion on the Loess Plateau. In the study,the Revised Universal Soil Loss Equation(RUSLE) was applied to evaluate annual soil loss caused by water erosion. The results showed as follows. The soil erosion on the Loess Plateau between2000 and 2010 averaged for 15.2 t hm 2a 1and was characterized as light for the value less than 25 t hm 2a 1. The severe soil erosion higher than 25 t hm 2a 1was mainly distributed in the gully and hilly regions in the central,southwestern,and some scattered areas of earth-rocky mountainous areas on the Loess Plateau. The soil erosion on the Loess Plateau showed a deceasing trend in recent decade and reduced more at rates more than 1 t hm 2a 1in the areas suffering severe soil loss. Benefited from the improved vegetation cover and ecological construction,the soil erosion on the Loess Plateau was significantly declined,especially in the east of Yulin,most parts of Yan’an prefectures in Shaanxi Province,and the west of Luliang and Linfen prefectures in Shanxi Province in the hilly and gully regions. The variation of vegetation cover responding to soil erosion in these areas showed the relatively higher contribution than the precipitation. However,most areas in Qingyang and Dingxi prefectures in Gansu Province and Guyuan in Ningxia Hui Autonomous Region were predominantly related to precipitation.