攀西地区土壤侵蚀时空变化及驱动因素  

Spatiotemporal variation and driving factors of soil erosion in Panxi region

作　　者：姚昆 柯丹 程博 何磊[3] YAO Kun;KE Dan;CHENG Bo;HE Lei(College of Resource and Environment,Xichang University,Xichang,Sichuan 615000,China;Sichuan Forestry and Grassland Panxi Forestry and Grassland Fire Prevention and Control Engineering Technology Research Center,Xichang,Sichuan 615000,China;School of Software Engineering,Chengdu University of Information Technology,Chengdu,Sichuan 610103,China)

机构地区：[1]西昌学院资源与环境学院,四川西昌615000 [2]四川林业草原攀西林草火灾防控工程技术研究中心,四川西昌615000 [3]成都信息工程大学软件工程学院,四川成都610103

出　　处：《湖南农业大学学报(自然科学版)》2025年第1期83-89,共7页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：国家重点研发计划项目(2020YFA0608203);四川省自然资源厅科研项目(Kj-2022012);遥感信息与图像分析技术国家级重点实验室稳定支持项目(JCKY2022201CRS029);凉山州科技计划重点研发项目(22ZDYF0173);沱江流域高质量发展中心项目(TJGZL2023-28)。

摘　　要：基于修正通用土壤流失方程(RUSLE)模型,对1990—2020年攀西地区土壤侵蚀模数进行计算与分级,并借助Sen氏斜率、Mann-Kendall检验及地理探测器模型,对该地区30年内土壤侵蚀时空动态变化规律及影响因素进行分析。结果表明:攀西地区约60%的区域土壤侵蚀强度等级为微度及轻度,其整体处于中等侵蚀水平;与北部相比,南部整体受侵蚀的地区分布范围更广且程度也更严重;斜率及显著性检验结果显示,该地区土壤侵蚀具有较强的稳定性,全域16.58%和77.54%的地区呈侵蚀无或无显著改变的发展倾向,仅1.51%的地区为显著变差;各因素对土壤侵蚀空间布局形成的影响作用差异显著,坡度解释力最大,为17.86%,年降水量最小仅2.48%,而在驱动其格局改变的因素中,土地利用类型的解释力最大,为8.64%。可见,攀西地区土壤侵蚀整体发展趋势良好,自然因素虽然是决定其布局形成的主要因素,但人类活动才是主导其格局变化的关键因素。Based on the revised universal soil loss equation(RUSLE)model,the soil erosion modulus in the Panxi region from 1990 to 2020 were calculated and classified.The spatiotemporal dynamic changes and influencing factors of soil erosion in the region over the past three decades were analyzed using Sen’s slope,Mann-Kendall test,and geographic detector model.The results revealed that over 60%of the soil erosion intensities in the Panxi region were classified as micro or mild,with an overall erosion level classified as moderate.The southern region showed a wider distribution range and more severe erosion compared to the north.The slope and significance test indicated strong stability in soil erosion across the region,with 16.58%of the area showing no change and 77.54%experiencing no significant change in erosion.Only 1.51%of area showed significant deterioration.The impact of various factors on the formation of soil erosion spatial layout varied considerably.Slope had the highest explanatory power at 17.86%,while annual precipitation had the lowest at only 2.48%.Among the factors driving its pattern change,land use type had the highest explanatory power at 8.64%.These findings suggested that the overall trend of soil erosion in the Panxi region had been positive.While natural factors primarily determined its layout,human activities played a crucial role in driving changes in erosion patterns.

关 键 词：土壤侵蚀 时空动态 驱动因素 RUSLE模型 地理探测器 攀西地区 

分 类 号：S157.1[农业科学—土壤学]