水土保持学报2025，Vol.39Issue(2)：378-389,12.DOI:10.13870/j.cnki.stbcxb.2025.02.013
滇西北云龙县2000-2020年土壤侵蚀时空演变特征及影响因素
Temporal and Spatial Dynamics of Soil Erosion and Its Influencing Factors in Yunlong County,Northwest Yunnan Province from 2000 to 2020
摘要
Abstract
[Objective]The investigation of temporal and spatial variations in soil erosion and its influencing factors in Yunlong County is of great significance for the advancement of featured agriculture,management and restoration of ecological environment,and soil erosion control in alpine and canyon regions.[Methods]The GIS and RUSLE model were employed to simulate the spatiotemporal evolution characteristics of soil erosion in Yunlong County from 2000 to 2020.The relationship between featured agriculture and soil erosion was analyzed.By considering influential factors such as elevation,slope,annual average rainfall,vegetation coverage,and land use type,the quantitative attribution of soil erosion was examined using a geographic probe model.[Results]1)From 2000 to 2020,the average erosion modulus in Yunlong County exhibited a decreasing trend across five stages(each stage included five years),being 1 644,1 085,878,661 and 467 t/(km2·a),respectively,and the overall soil erosion shifted from moderate to mild intensity.2)Over the past 20 years,there was a significant increase in proportion of the area where soil erosion had been improved,with an increase of 48.45%,while the proportion of area experiencing soil erosion deterioration only increased by 4.23%,indicating an overall trend of decline and improvement in erosion grades.3)Soil erosion in Yunlong County was predominantly concentrated within the elevation range of 2 000～2 500 m and slopes between 15°～25°.4)The soil and water conservation capacity of typical featured agriculture in Yunlong County followed the order of pickled walnut>Chinese herbal medicine under the forest>ecological green tea>Maidiwan pear.5)The influencing factors for soil erosion in Yunlong County ranked as the order of vegetation coverage>altitude>slope>annual average rainfall>land use type,with the corresponding q values being 0.401 0,0.142 0,0.117 5,0.115 9 and 0.046 6,respectively.Notably,the interaction between vegetation coverage and slope exhibited the strongest explanatory power with a q value of 0.82.[Conclusion]Overall soil erosion in Yunlong County has shown effective improvement over a span of two decades.During this period,there had been a weakening trend in soil erosion accompanied by an increase in vegetation coverage.Future attention should be directed towards monitoring changes in soil erosion within altitudes ranging from 2 000～2 500 m and slopes between 15°～25° in Yunlong County while ensuring proper implementation of measures to develop featured agriculture and restore the microtopography on slopes to mitigate risks associated with further deterioration of soil erosion.关键词
云龙县/土壤侵蚀/RUSLE模型/地理探测器/时空演变Key words
Yunlong County/soil erosion/RUSLE model/geographical detector/temporal and spatial evolution分类
农业科学引用本文复制引用
朱婉菁,王克勤,宋娅丽,马建刚,刘欣艺,王振超,赵洋毅..滇西北云龙县2000-2020年土壤侵蚀时空演变特征及影响因素[J].水土保持学报,2025,39(2):378-389,12.基金项目
"十四五"国家重点研发计划项目(2022YFF1302904) （2022YFF1302904）
国家自然科学基金项目(42067005) （42067005）
云南省农业联合专项面上项目(202101BD070001-075) （202101BD070001-075）
云南省青年人才专项(YNWR-QNBJ-2019-215) （YNWR-QNBJ-2019-215）
云南省水土保持与荒漠化防治学一流学科开放课题项目(SBK20240045) （SBK20240045）
