Spatial-Temporal Variations and Influencing Factors of Water-related Ecosystem Services in Southwest China Under Complex Terrain

TANG Shuang; ZHU Chongjing; GAO Jie; BIAN Hongyan

doi:10.13870/j.cnki.stbcxb.2024.06.029

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Spatial-Temporal Variations and Influencing Factors of Water-related Ecosystem Services in Southwest China Under Complex Terrain

更新时间：2025-02-18

- Spatial-Temporal Variations and Influencing Factors of Water-related Ecosystem Services in Southwest China Under Complex Terrain
- Vol. 38, Issue 6, Pages: 244-252(2024)
- 作者机构：
  
  西南大学地理科学学院,重庆,400715
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2024.06.029
  CLC： Q147
- Published：2024
- 稿件说明：
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TANG Shuang, ZHU Chongjing, GAO Jie, et al. Spatial-Temporal Variations and Influencing Factors of Water-related Ecosystem Services in Southwest China Under Complex Terrain[J]. 2024, 38(6): 244-252.
DOI：

TANG Shuang, ZHU Chongjing, GAO Jie, et al. Spatial-Temporal Variations and Influencing Factors of Water-related Ecosystem Services in Southwest China Under Complex Terrain[J]. 2024, 38(6): 244-252. DOI： 10.13870/j.cnki.stbcxb.2024.06.029.

摘要

[目的] 西南地区水生态系统服务时空变化及其在不同地貌和地形下的影响因素研究能为该区域生态管理和可持续发展提供依据。[方法] 采用InVEST模型和通用土壤流失方程评估1992—2020年逐年产水量和土壤侵蚀量

探讨产水量和土壤侵蚀量的多维变化特征(时间、空间、高程)

通过相对重要性分析方法量化分析气候变化和土地利用变化对水生态系统服务相对贡献率。[结果] (1)1992—2020年

西南地区产水量呈下降趋势

2002年为产水量变化的突变年

土壤侵蚀量呈上升趋势

1997年为土壤侵蚀量变化的突变年。(2)产水量随海拔的上升而下降

土壤侵蚀量随海拔的上升而上升。(3)在喀斯特地区

降水对产水量和土壤侵蚀量的相对贡献率大于非喀斯特地区。[结论] 气候变化对产水量和土壤侵蚀量的影响比较明显

土地利用变化对其影响较小。研究结果可为复杂地形地区(不同海拔

不同地貌)制定生态保护方案和措施提供参考

也为喀斯特地区土地管理和生态恢复措施提供科学依据。

Abstract

[Objective] The study of spatial-temporal variations and influencing factors of water-related ecosystem services under complex terrain in Southwest China can serve as a foundation for the ecological management and sustainable development in this region. [Methods] The annual water yield and soil erosion in Southwest China from 1992 to 2020 were evaluated to explore the multi-dimensional (including time

space and elevation) variation characteristics by the InVEST model and universal soil loss equation. In addition

the relative weight analysis method was used to quantify the relative contribution rate of climate and land use change to water-related ecosystem services. [Results] (1) From 1992 to 2020

water yield in Southwest China showed a downward trend

with a notable mutation occurring in 2002; soil erosion showed an increasing trend

with a mutation observed in 1997. (2) The water yield decreased and soil erosion increased with rising altitude. (3) The relative contribution rate of precipitation to both water yield and soil erosion in karst areas was found to be greater than that in non-karst areas. [Conclusion] Climate change has a more significant impact on water yield and soil erosion

while land use change has a less obvious impact. This study will contribute to the ecological protection in complex terrain (with different elevations and different landforms) and provide a scientific basis for land management and ecological restoration measures in karst areas.

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