Journal of Geographical Sciences ›› 2019, Vol. 29 ›› Issue (5): 779-790.doi: 10.1007/s11442-019-1627-9

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Geodetection analysis of the driving forces and mechanisms of erosion in the hilly-gully region of northern Shaanxi Province

Xuefeng YUAN1,2,3,4(), Jichang HAN1,2,*(), Yajing SHAO4, Yuheng LI3, Yongsheng WANG3   

  1. 1. College of Land Engineering, Chang’an University, Xi’an 710075, China
    2. Key Laboratory of Degraded and Unused Land Consolidation Engineering, The Ministry of Land and Resources, Xi’an 710075, China
    3. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
    4. School of Earth Science and Resources, Chang’an University, Xi’an 710054, China
  • Received:2018-07-15 Accepted:2019-01-10 Online:2019-05-25 Published:2019-04-19
  • Contact: Jichang HAN E-mail:zyxfyun@chd.edu.cn;hanjicsxdj@126.com
  • About author:

    Author: Yuan Xuefeng, Associate Professor, specialized in land science and rural development. E-mail: zyxfyun@chd.edu.cn

  • Supported by:
    Fund from the Key Laboratory of Degraded and Unused Land Consolidation Engineering, No.214027170087;National Key Research and Development Program of China, No.2017YFC0504705

Abstract:

This paper analyzes the spatial variation in soil erosion in the loess hilly-gully region of northern Shaanxi Province, China. It sums up existing research, describes the factors that drive soil erosion, and uses geodetection to investigate the factors individually and in pairs. Our results show that soil erosion in the loess hilly-gully region of northern Shaanxi is mainly hydraulic erosion. There are significant spatial differences in the severity of soil erosion in the region. Generally, it is more severe in the north and west and less severe in the south and east. Individual factor detection results show that the major risk factors affecting soil erosion are human population distribution, precipitation, land-use type, elevation, and soil type. Interactive detection results show that interacting factors play much bigger roles in soil erosion than do individual factors. Based on forced detection results from different periods of time, we can see that forest and grass coverage, urbanization, and economic development in the study area all clearly inhibit soil erosion.

Key words: soil erosion, driving factors, geodetection, loess hilly-gully region, northern Shaanxi