基于DEM的都坝河流域地貌类型识别  

Recognition of Landform Types in Duba River Basin based on DEM

作　　者：刘慧丽 董廷旭[1] 陈浩[1] 王飞 廖传露 LIU Huili;DONG Tingxu;CHEN Hao;WANG Fei;LIAO Chuanlu(School of Resource and Environmental Engineering,Mianyang Teachers'College,Mianyang,Sichuan 621000)

机构地区：[1]绵阳师范学院资源环境工程学院,四川绵阳621000

出　　处：《绵阳师范学院学报》2023年第11期106-113,共8页Journal of Mianyang Teachers＇ College

基　　金：四川省科技厅应用基础研究项目(2019YJ0496)。

摘　　要：为进一步分析都坝河流域地质灾害致灾环境因子,以1∶50000地形图为基本资料建立DEM,选取流域的宏观及微观地形因子,通过均值变点、相关系数矩阵及主成分分析方法确定最佳地形因子及最佳统计窗口,最后进行流域地貌类型识别.结果表明:(1)都坝河流域的最佳地形因子为地形起伏度、高程、坡度变率和平面曲率,累积解释率达到80%,且地形起伏度的最佳统计窗口为18×18(0.2916 km2);(2)都坝河流域可划分为8种地貌类型,其中以小起伏中山、小起伏亚高山、小起伏低山和中起伏低山地貌类型为主,占比为76.33%.该研究结果揭示了都坝河流域的地貌类型空间分布,对生态环境治理、灾害防治具有现实意义.In order to further analyze the environmental factors of geological disasters in the Duba River Basin,DEM was established with 1:50000 topographic map as the basic data,and macro and micro topographic factors were selected respectively in the Duba River Basin.The best topographic factors and the best statistical window were determined by means change-point method,correlation coefficient matrix and principal component analysis.Finally,geomorphic types of the Duba River Basin were identified.The results showed that:(1)the best topographic factors in the Duba River Basin were topographic relief,elevation,variance of slope and plane curvature,and the cumulative interpretation rate reached 80%.The best statistical window of topographic relief was 18×18(0.2916 km 2).(2)The Duba River Basin was divided into 8 geomorphic types,among which the main geomorphic types were small undulating middle mountain,small undulating sub-alpine,small undulating low mountain and medium undulating low mountain,accounting for 76.33%.The results of the study reveal the spatial distribution of geomorphic types in the Duba River Basin,which has practical significance for ecological environment management and disaster prevention.

关 键 词：地貌类型 都坝河流域 均值变点法 主成分分析法 最佳地形因子组合 

分 类 号：P931[天文地球—自然地理学]