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Changes to soil conservation in the Three Gorges Reservoir Area between 1982 and 2015

  • Qiang Xiao
  • Yang XiaoEmail author
  • Hong Tan
Article
  • 52 Downloads

Abstract

Soil erosion is a major threat in the Three Gorges Reservoir Area (TGRA) of China. Since 1990, the Chinese government has launched a series of ecological restoration projects to promote soil conservation in the TGRA. To understand the effects of ecological restoration on soil conservation in the TGRA, we used the abrupt change analysis of soil mass from 1982 to 2015 and its drivers; soil mass was obtained with the universal soil loss equation at continental scale. We found that soil conservation and annual rainfall decreased in the TGRA over the study period. Abrupt change points of soil conservation occurred in 1984 and 2007. Soil conservation in the TGRA showed a dramatic decrease before 1984, a slow increase after 1984 as a result of climate, and a rapid increase after 2007 due to an increase in vegetation cover. From 1982 to 2015, climate change played a primary role in soil conservation changes and was more influential than topography and vegetation. However, ecological restoration was an important factor affecting soil conservation in the TGRA, and it needs to be promoted.

Keywords

TGRA Soil conservation Abrupt change Normalized Difference Vegetation Index Slope effects 

Notes

Acknowledgments

We thank Kathryn Piatek for his help in writing this paper and the journal editors and anonymous reviewers for their comments on an earlier version of this manuscript.

Funding information

This work was financially supported by the Science and Technology Project of Chongqing Education Commission of China (kj1501102).

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Chongqing College of Arts and SciencesChongqingChina
  2. 2.College of Biology and Environmental SciencesJishou UniversityJishouChina

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