人民长江2026，Vol.57Issue(3)：51-61,11.DOI:10.16232/j.cnki.1001-4179.2026.03.007
基于遥感的山区河流"断面-河段"形态特征分析
Remote sensing-based analysis of cross-section-reach morphological characteristics in mountainous rivers
摘要
Abstract
In mountainous rivers,the hydrological monitoring network is sparse,and the identification and analysis of large-scale river morphology form the foundation for runoff remote sensing monitoring in data-scarce regions.In this study,water-sur-face vectors of a mountain river were extracted from remote sensing data.An indicator system for cross-sectional morphological characteristics was established,and K-means clustering method was employed to identify the classification characteristics of cross sections and river reaches,as well as their combined classification features.The results show that:① according to the cluster a-nalysis results,cross-sectional morphology in the upper Jinsha River can be classified into five types,among which the symmetric canyon-controlled type(Type 0)accounts for 76.98%;the morphological characteristics are significantly associated with the hydrodynamic environment.② Reach morphological complexity increases with reach length(for reaches of 300～1 500 m,the number of clustered classes increases to 19).Short reaches are dominated by a single hydrodynamic process,whereas long reaches are strongly affected by terrain-flow interactions.③The mean ratio of water-surface width between the dry season and the flood season is 0.52,and a rightward bias of flood-season flow is observed(mean reach morphology index is 1.18),which is consist-ent with the Coriolis effect.These results provide a scientific basis for runoff estimation in data-scarce regions,hydrodynamic modeling of mountain rivers,ecological restoration,and flood-management practices.关键词
山区河流/断面形态/河段形态/K均值聚类/遥感监测/金沙江Key words
mountain rivers/cross-sectional morphology/reach morphology/K-means clustering/remote sensing monito-ring/Jinsha River分类
建筑与水利引用本文复制引用
徐涛,梁犁丽,龚家国,李泽林,殷兆凯..基于遥感的山区河流"断面-河段"形态特征分析[J].人民长江,2026,57(3):51-61,11.基金项目
中国长江电力股份有限公司项目(Z432402001) （Z432402001）
国家自然科学基金长江水科学研究联合基金项目(U2240202) （U2240202）
国家自然科学基金项目(52394233) （52394233）
