水土保持研究2024，Vol.31Issue(4)：126-134,9.DOI:10.13869/j.cnki.rswc.2024.04.044
青藏高原土壤侵蚀对气候变化和生态政策的非线性响应
Nonlinear Response of Soil Erosion in the Tibetan Plateau to Cliamte Change and Ecological Policies
摘要
Abstract
[Objective]The aims of this study are to evaluate the spatiotemporal trends of soil erosion,to reveal the contributions of driving factors,to elucidate the impacts of ecological restoration policies,and to provide a scientific basis for the management of soil erosion on the Tibetan Plateau.[Methods]This study assessed the temporal and spatial characteristics of soil erosion by water on the Tibetan Plateau from 1990 to 2020,and identified the contribution of climatic,anthropogenic and topographic factors to soil erosion by Random Forest Regression.[Results](1)The average soil erosion rate on the Tibetan Plateau was 305.78 t/km2,and more than 80％of the area was slightly erosion during 1990-2020.Soil erosion decreased before 2010 and increased after 2010,showing a nonlinear variation.(2)Climate factors had a greater impact on soil erosion than anthropogenic factors in the Tibetan Plateau,and annual precipitation was the main factor on soil erosion.In addition,since 2010,the influence of anthropogenic factors on soil erosion gradually increased.[Conclusion]Climate factors are the primary driving force inducing soil erosion in the Tibetan Plateau.The ecological restoration policies implemented in the Tibetan Plateau have initially achieved results,but the impact of climate change on soil erosion is more significant.Additionally,Random Forest Regression is effective for exploring the driving factors on soil erosion.关键词
土壤侵蚀/气候变化/人类活动/随机森林回归模型/青藏高原Key words
soil erosion/climate change/human activities/Random Forest Regression model/Tibetan Plateau分类
农业科技引用本文复制引用
刘悦俊,程江浩,张燕杰..青藏高原土壤侵蚀对气候变化和生态政策的非线性响应[J].水土保持研究,2024,31(4):126-134,9.基金项目
国家自然科学基金项目(项目号:42101292) （项目号:42101292）
大理大学博士科研启动费项目(项目号:KYBS2021071) （项目号:KYBS2021071）
