基于RUSLE的鉴江流域土壤侵蚀量特征分析  

Analysis on Soil Erosion Characteristics in Jianjiang River Basin Based on RUSLE

作　　者：杨冰 黄东[1,3] 李海彬[1,3] 梁汝豪 YANG Bing;HUANG Dong;LI Haibin;LIANG Ruhao(Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510635,China;School of Civil Engineering and Transportation, South China University of Technology,Guangzhou 510641,China;Guangdong Key Laboratory of Hydrodynamic Research,Guangzhou 510635,China)

机构地区：[1]广东省水利水电科学研究院,广东广州510635 [2]华南理工大学土木与交通学院,广东广州510641 [3]广东省水动力学应用研究重点实验室,广东广州510635

出　　处：《广东水利水电》2021年第6期108-112,123,共6页Guangdong Water Resources and Hydropower

基　　金：国家重点研发计划项目(编号:2016YFC0402606);广东省水利科技创新重大项目(编号:2015-09)。

摘　　要：为了解鉴江流域的泥沙来源情况,基于降雨量、土壤类型、数字高程模型以及土地覆盖类型数据,运用土壤流失方程(RUSLE)计算不同地区土壤侵蚀量。通过模型理论计算来分析论证鉴江流域泥沙主要源区,同时基于降雨量线性变化趋势预测流域来沙趋势变化情况。研究结果表明:2008—2017年鉴江流域属于中度土壤侵蚀,年均土壤流失量为4932 t/(km^(2)·a);各镇土壤侵蚀量均值为0~24549 t/(km^(2)·a),大坡镇、罗坑镇、那霍镇、硃砂镇和马贵镇是主要泥沙源区;罗坑镇、云潭镇、那霍镇、播扬镇和东镇街是流域侵蚀情况最严重的地区;信宜和高州东北部地区(高州水库上游地区)降雨趋势显著上升,土壤侵蚀量也将显著升高。To fully understand the sediment sources of Jianjiang River Basin,the Revised Universal Soil Loss Equation(RUSLE)and geographic information system(GIS)was used to calculate the amount of soil erosion in different regions based on rainfall,soil type,digital elevation model and land-cover data.In this way,the sediment source areas of Jianjiang River Basin were analyzed and demonstrated,and the sediment trend was predicted based on the linear trend of rainfall.Research indicates:①2008~2017,the soil erosion level of the basin belonged to moderate erosion,with an average value of 4932 t/(km^(2)·a),②The average value of soil erosion in each town is 0~24549 t/(km^(2)·a),and the main sediment source areas are Dapo Town,Luokeng Town,Nahuo Town,Zhusha Town,Magui Town,③Luokeng Town,Yuntan Town,Nahuo Town,Boyang Town,Dongzhen Town are the area with the worst soil erosion level,④The rainfall trend in Xinyi and the northeastern of Gaozhou will increase significantly,and the amount of soil erosion will increase too.

关 键 词：鉴江流域 土壤侵蚀 土地覆盖类型 泥沙来源 来沙趋势 

分 类 号：S157[农业科学—土壤学]