湖北农业科学 ›› 2019, Vol. 58 ›› Issue (12): 69-73.doi: 10.14088/j.cnki.issn0439-8114.2019.12.016

• 资源·环境 • 上一篇    下一篇

基于连环替代法的三江源地区土壤侵蚀评价及其影响因素分析

杨雪琴, 贺倩, 刘恩勤   

  1. 成都理工大学地球科学学院,成都 610000
  • 收稿日期:2019-03-21 出版日期:2019-06-25 发布日期:2019-12-05
  • 通讯作者: 刘恩勤(1984-),女,湖北随州人,讲师,(电话)18584805870(电子信箱)liuenqin@qq.com。
  • 作者简介:杨雪琴(1998-),女,四川绵阳人,在读本科生,(电话)17748499450(电子信箱)928404916@qq.com。
  • 基金资助:
    中国科学院战略性先导科技专项(A类)项目(A-XDA20030301); 成都理工大学2018—2020年高等教育人才培养质量和教学改革一般立项项目(JG183023); 成都理工大学2018—2019年度大学生课外科技立项重点项目(2018KJZ0008)

Evaluation of soil erosion and its influencing factors in the source of the three rivers region based on continuous replacement method

YANG Xue-qin, HE Qian, LIU En-qin   

  1. College of Earth Science,Chengdu University of Technology,Chengdu 610000,China
  • Received:2019-03-21 Online:2019-06-25 Published:2019-12-05

摘要: 基于RS与GIS技术,利用RUSLE模型对三江源地区2010、2015年的土壤侵蚀状况进行了评价。同时引入连环替代法探讨土壤侵蚀变化的影响因素。结果表明,三江源地区整体上呈现出中东部侵蚀严重,东部和西部侵蚀较小的空间分布特征;随着海拔和坡长坡度的增加,土壤侵蚀模数也随之增加,坡度坡长因子增幅比高程更大,土壤侵蚀对坡度坡长因子更敏感;2010—2015年整体上土壤侵蚀减小,中部和西部地区侵蚀减小,东部地区侵蚀增加;连环替代法较好地定量描述了由于降雨和植被因子造成的土壤侵蚀量及其在空间分布上的变化,降雨对全区的影响范围较大但程度较低,植被影响范围较集中但程度较深。

关键词: RUSLE, 土壤侵蚀, 连环替代法, 三江源地区

Abstract: Based on RS and GIS technology, the RUSLE model to evaluate the soil erosion in the source of the three rivers region in 2010 and 2015 was used. At the same time, the continuous substitution method was introduced to explore the influencing factors of soil erosion change,and the multi-factor cross-effect problem was solved. The results showed that the source of the three rivers region presented a large spatial distribution of erosion in the central and eastern parts and less erosion in the east and west. With the increase of elevation and slope length, the soil erosion modulus increased, and the slope length factor increased larger than the elevation. The slope length factor was more sensitive. Overall soil erosion modulus was reduced in 2010—2015, modulus was reduced in the central and western regions, and modulus was increased in the eastern region. The continuous substitution method was better quantitatively described the amount of soil erosion caused by the rainfall and vegetation factors and its spatial distribution. The impact of rainfall on the whole area was large and the degree was low, and the range of vegetation impact was relatively concentrated and deep.

Key words: RUSLE, soil erosion, the continuous substitution method, the source of the three rivers region

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