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Self-Organizing Map Network-Based Soil and Water Conservation Partitioning for Small Watersheds: Case Study Conducted in Xiaoyang Watershed, China

Author

Listed:
  • Lingxia Wang

    (College of Environmental Science and Engineering, Hunan University, Changsha 410082, China)

  • Zhongwu Li

    (College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
    College of Resources and Environmental Sciences, Hunan Normal University, Changsha 410081, China)

  • Danyang Wang

    (College of Environmental Science and Engineering, Hunan University, Changsha 410082, China)

  • Xiaoqian Hu

    (College of Environmental Science and Engineering, Hunan University, Changsha 410082, China)

  • Ke Ning

    (College of Environmental Science and Engineering, Hunan University, Changsha 410082, China)

Abstract

Soil and water conservation partitioning (SWCP) considers complex environmental statutes and development demands and serves as a scientific basis for conducting soil erosion management and practice. However, few studies have researched partitioning in small watersheds (< 50 km 2 ), and guidelines for enabling region-specific measures are lacking. In this study, the Xiaoyang watershed located in the red soil region of southern China was selected as a representative small watershed in which to conduct partitioning. The pressure–state–response (PSR) model was used as a framework for establishing an indicator system that included soil erosion sensitivity, the soil erosion condition, and ecosystem services. With three soil and water conservation variables as the input layer, a one-dimensional self-organizing map was applied to identify clusters in the small watershed. The silhouette width was evaluated to determine the optimal number of regions. Based on the associated results, the Xiaoyang watershed was divided into five regions accounting for 82%, 9%, 8%, 2%, and 1% of the total area, respectively. This study provides a framework on which region-specific soil erosion measures can be planned, and it also provides a partitioning method that can be employed in other areas.

Suggested Citation

  • Lingxia Wang & Zhongwu Li & Danyang Wang & Xiaoqian Hu & Ke Ning, 2020. "Self-Organizing Map Network-Based Soil and Water Conservation Partitioning for Small Watersheds: Case Study Conducted in Xiaoyang Watershed, China," Sustainability, MDPI, vol. 12(5), pages 1-17, March.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:5:p:2126-:d:330458
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    References listed on IDEAS

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