Coupling Relationship Between Soil Erosion Risk and Natural Suitability of Human Settlements in Guyuan City, Ningxia Hui Autonomous Region

Zhang Weichen; Zhang Guojun; Wei Xiaoyan; Ma Wentao; Cheng Jinhua

doi:10.13961/j.cnki.stbctb.2023.05.030

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Coupling Relationship Between Soil Erosion Risk and Natural Suitability of Human Settlements in Guyuan City, Ningxia Hui Autonomous Region

- Coupling Relationship Between Soil Erosion Risk and Natural Suitability of Human Settlements in Guyuan City, Ningxia Hui Autonomous Region
- Bulletin of Soiland Water Conservation Vol. 43, Issue 5, Pages: 252-261(2023)
- 作者机构：
  
  1. 北京林业大学水土保持学院,北京,100083
  2. 宁夏水土保持监测总站,宁夏,银川,750021
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2023.05.030
  CLC： S157.1
- Published：2023
- 稿件说明：
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Zhang Weichen, Zhang Guojun, Wei Xiaoyan, et al. Coupling Relationship Between Soil Erosion Risk and Natural Suitability of Human Settlements in Guyuan City, Ningxia Hui Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2023, 43(5): 252-261.
DOI：

Zhang Weichen, Zhang Guojun, Wei Xiaoyan, et al. Coupling Relationship Between Soil Erosion Risk and Natural Suitability of Human Settlements in Guyuan City, Ningxia Hui Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2023, 43(5): 252-261. DOI： 10.13961/j.cnki.stbctb.2023.05.030.

摘要

[目的] 探究宁夏固原市水土流失风险与人居环境自然适宜性的耦合关系，为小流域水土流失精准防治及有序治理提供理论支撑，使水土流失治理更好地服务于人居环境提升。[方法] 采用PSR模型、人居环境指数模型等方法计算小流域水土流失风险和人居环境自然适宜性，对两者进行相关性及耦合度分析，计算并分析其耦合协调度和耦合协调类型。[结果] ①研究区水土流失风险为中度、高度危险小流域占28%，分布在西南部和东南部；人居环境自然适宜性等级为不适宜的小流域占12%，分布在西吉县南部和隆德县东北部。②水土流失风险与人居环境自然适宜性相关系数为0.61。74%的小流域为高水平耦合与良性共振耦合；67%的小流域为协调发展和优质协调。③协调同步型、失调共损型、水土流失滞后型和人居环境滞后型小流域分别为75，36，79，114条。[结论] ①固原市水土流失与人居环境具有较高的相关性和耦合度，且具有明显的相互促进作用。②研究区有79条水土流失风险滞后型小流域需要进行水土流失治理，有36条失调共损型小流域应结合地区实际进行自然环境重点治理和改造。

Abstract

[Objective] Investigating the coupling relationship between the risk of soil erosion and the natural suitability of human settlements in Guyuan City

Ningxia Hui Autonomous Region provides theoretical support for the prevention and control of soil erosion in small watersheds

and thereby contributes more to the improvement of human settlements. [Methods] The PSR model and the human settlement index model were used to calculate the risk of soil erosion in a small watershed as well as the natural suitability for human settlement. The correlation and the coupling degree of the two factors were calculated to analyze their coupling coordination degree and the coupling coordination type. [Results] ① The small watersheds with moderate and high risk of soil erosion accounted for 28% of the area

and were located in the southwest and southeast. Small watersheds that were rated as unsuitable for human settlement accounted for 12% of the area

located in the southern of Xiji County and Northeastern Longde County. ② The correlation coefficient between soil erosion risk and natural suitability of human settlements was 0.61. 74% of small watersheds were found to have high coupling degree and benign resonance coupling areas

and 67% of small watersheds were found to be coordinated development and highly coordinated development areas. ③ There were 75

and 114 watersheds classified as coordination and synchronization type small watersheds

imbalance and co-loss type small watersheds

soil erosion lag type small watersheds

and human settlement lag type small watersheds

respectively. [Conclusion] ① Soil erosion and human settlement in Guyuan City had high correlation

high coupling degree

and significant mutual promotion effects. ② There were 79 small watersheds with lagging risk of soil erosion that needed to be controlled

and 36 dysfunctional co-loss type small watersheds should be treated and reconstructed according to the local conditions.

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