龙川江流域近20年土壤侵蚀时空变化及驱动因素分析

彭大力; 张斌; 吴林蓬; 邹介石; 罗君; 刘辉; 王磊

doi:10.13870/j.cnki.stbcxb.2024.04.014

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龙川江流域近20年土壤侵蚀时空变化及驱动因素分析

更新时间：2025-03-12

- 龙川江流域近20年土壤侵蚀时空变化及驱动因素分析
- Analysis of Spatial and Temporal Changes and Driving Factors of Soil Erosion in Longchuan River Basin in Recent 20 Years
- 水土保持学报 2024年38卷第4期页码：29-37
- 作者机构：
  
  1. 西华师范大学地理科学学院,四川,南充,637009
  2. 西华师范大学四川省干旱河谷土壤侵蚀监测与控制工程实验室,四川,南充,637009
  3. 大小凉山干旱河谷土壤侵蚀与生态修复野外科学观测研究站, 四川喜德,616753
- 作者简介：
  
  [ "彭大力(1998—),男,在读硕士研究生,主要从事土壤侵蚀与生态修复研究。E-mail:peng106462@163.com" ]
- 基金信息：
  
  国家自然科学基金项目(42307454,41971015);西华师范大学校级基本科研业务费项目(20E030,22kA002);西华师范大学校级科研创新团队项目(KCXTD2022-1)
- DOI：10.13870/j.cnki.stbcxb.2024.04.014
  中图分类号： S157.1
- 纸质出版：2024
- 稿件说明：
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彭大力, 张斌, 吴林蓬, 等. 龙川江流域近20年土壤侵蚀时空变化及驱动因素分析[J]. 水土保持学报, 2024,38(4):29-37.

PENG Dali, ZHANG Bin, WU Linpeng, et al. Analysis of Spatial and Temporal Changes and Driving Factors of Soil Erosion in Longchuan River Basin in Recent 20 Years[J]. 2024, 38(4): 29-37.
彭大力, 张斌, 吴林蓬, 等. 龙川江流域近20年土壤侵蚀时空变化及驱动因素分析[J]. 水土保持学报, 2024,38(4):29-37. DOI： 10.13870/j.cnki.stbcxb.2024.04.014.

PENG Dali, ZHANG Bin, WU Linpeng, et al. Analysis of Spatial and Temporal Changes and Driving Factors of Soil Erosion in Longchuan River Basin in Recent 20 Years[J]. 2024, 38(4): 29-37. DOI： 10.13870/j.cnki.stbcxb.2024.04.014.

摘要

[目的] 探究龙川江流域土壤侵蚀时空变化及其主控因子并掌握当地水土保持情况

有利于筑牢长江上游生态屏障。[方法] 采用通用土壤流失方程RUSLE

结合GIS和RS技术

研究龙川江流域2000—2020年的土壤侵蚀时空变化特征

同时利用最优参数地理探测器(OPGD)模型

量化驱动因子对龙川江流域土壤侵蚀时空动态变化的影响力和相互作用。[结果] (1)龙川江流域土壤侵蚀主要以微度和中度侵蚀为主

面积占比分别为2000年49.17%

2010年50.29%

2020年59.29%。2000—2010年土壤侵蚀变化较小

2010—2020年

共有9.01%的中度及以上侵蚀区域转为微度和轻度侵蚀。(2)最优参数地理探测器结果显示

在选取的影响因子中土地利用类型对研究区土壤侵蚀时空动态变化解释力最强

q值为0.18。土地利用类型与坡度的交互作用对龙川江流域土壤侵蚀解释力最强

q值达到0.45。[结论] 龙川江流域的土壤侵蚀主要以微度和轻度侵蚀为主

整体呈好转趋势

但元谋盆地土壤侵蚀仍较剧烈。土地利用类型对流域内土壤侵蚀的影响最强

而研究区最主要的土地利用类型为植被

占总面积的67.02%

因此未来需重点关注植被覆盖区域变化

继续推进生态保护政策

警惕地形复杂区域水土流失加剧风险。

Abstract

[Objective] The objective is to explore the spatial and temporal changes of soil erosion and its main controlling factors in the Longchuan River Basin

as well as to understand mastering the local soil and water

which is conducive to building an ecological barrier in the upper reaches of the Yangtze River. [Methods] The temporal and spatial variation characteristics of soil erosion in the Longchuan River Basin during 2000 to 2020 were studied using the revised universal soil loss equation (RUSLE) combined with GIS and RS technology. Additionally

the optimal parameters-based geographical detector (OPGD) model was used to quantify the influence and interaction of driving factors on the temporal and spatial dynamic changes of soil erosion in the Longchuan River Basin. [Results] (1) Soil erosion in the Longchuan River Basin was mainly slight and moderate erosion. In 2000

the proportion of slight and moderate erosion was 49.17%. In 2010

the total proportion was 50.29%; In 2020

the total proportion is 59.29%. There was little change in soil erosion from 2000 to 2010

but from 2010 to 2020

a total of 9.01% of areas experiencing soil erosion transitioned from moderate to slight or mild levels. (2) The results of the OPGD showed that the land use type had the strongest explanatory power for the temporal and spatial dynamic changes of soil erosion in the study area

with a q value was 0.18. The interaction between land use type and slope had the strongest explanatory power for soil erosion in Longchuan River Basin

with a q value reached 0.45. [Conclusion] Soil erosion in the Longchuan River Basin is mainly slight and mild

with an overall improving trend

but there are still areas with strong soil erosion. Land use type has the strongest impact on soil erosion in the basin

with woodlands and meadows being the most important types covering 67.02% of the total area in the study area. In the future

we should focus on regional changes in vegetation coverage

continue to promote ecological protection policies

and be alert to the risk of soil erosion in complex terrain areas.

关键词

Keywords

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