基于USLE模型的安宁河流域土壤侵蚀分析  

Analysis of Soil Erosion in Anning River Basin Based on USLE Model

作　　者：杜陈龄 白琳 姚昆 DU Chenling;BAI Lin;YAO Kun(College of Resource and Environment,Xichang University,Xichang 615000,China)

机构地区：[1]西昌学院资源与环境学院,四川西昌615000

出　　处：《测绘与空间地理信息》2024年第4期58-61,64,共5页Geomatics & Spatial Information Technology

基　　金：西南土地资源评价与监测教育部重点实验室开放基金(TDSYS202109);凉山州学术带头人和技术带头人培养资金(ZRS202001);西昌学院“两高”人才科研支持计划项目(YBZ202108、YBZ202125);四川省社科联、教育厅人文社科研究基金(ZHYJ21-YB09);四川省社会科学重点研究基地沱江流域高质量发展研究中心(TJGZL2020-06);国家级大学生创新创业训练计划项目(202110628028)资助。

摘　　要：为全面掌握安宁河流域土壤侵蚀状况并探讨其分布特征,基于USLE模型对该地区水力侵蚀模数进行计算,并就其在不同高程、坡度和地类分布变化规律展开探讨。结果表明:1)安宁河流域2020年土壤平均侵蚀模数为2962 t/(km^(2)·a),侵蚀强度整体处于中等水平;2)研究区西北部和东南部侵蚀较严重,特别是冕宁县、会东县、德昌县部分地区;3)海拔高程<3500 m均以微度侵蚀为主;坡度25°为整体侵蚀变化界线;有林地为主要侵蚀地类。建议坚持退耕(牧)还林(草),加强坡耕地治理,提高植被覆盖度,对土壤侵蚀状况进行实时监测,防治结合。In order to fully grasp the soil erosion status of the Anning River Basin and discuss its distribution characteristics,the hydraulic erosion modulus of the area is calculated based on the USLE model,and the distribution variation of different elevations,slopes and land types is discussed.The results show that:(1)the average soil erosion modulus in 2020 in the Anning River Basin is 2962 t/(km^(2)·a),and the erosion intensity is generally at a medium level;(2)the erosion in the northwest and southeast of the study area is more serious,especially in parts of Mianning county,Huidong county and Dechang county;(3)the elevation<3500 m are dominated by slight erosion;the slope is 25°as the overall erosion change boundary;and the woodland is the main erosion land.It is recommended to adhere to the return of farmland(pasture)to forest(grassland),strengthen the management of slope cultivated land,improve vegetation coverage,conduct real-time monitoring of soil erosion status,and combine prevention and control.

关 键 词：土壤侵蚀 安宁河流域 USLE模型 

分 类 号：P208[天文地球—地图制图学与地理信息工程]