河海大学学报（自然科学版）2026，Vol.54Issue(2)：9-17,9.DOI:10.3876/j.issn.1000-1980.2026.02.002
西南高山峡谷区金沙江流域河网结构特征
Characteristics of river network structure in the Jinsha River Basin of high-mountain canyon region in southwest China
摘要
Abstract
To study the structural characteristics of the river network in the Jinsha River Basin,river networks were extracted based on ASTER GDEMV3 data and the river network density method.By using the Horton-Stahler hierarchical method combined with indicators such as box dimension,bifurcation ratio,length ratio,and side-branch ratio,the self-similarity patterns and structural features of the Jinsha River Basin were analyzed,as well as the morphological characteristics of the main stream.The results indicate that rivers of levels 1-6 in the Jinsha River Basin exhibit structural and topological self-similarity,whereas rivers of levels 7-8 show no significant self-similarity.At the basin scale,box dimension and river network density satisfy self-similarity,with upper reaches characterized by smaller box dimensions and higher river network density,while the opposite is observed in the lower reaches.Topographic factors play a more dominant role than climatic factors in influencing box dimension and river network density in high-mountain canyon-type basins in southwestern China,such as the Jinsha River Basin.The river networks in high-altitude plateau regions generally exhibit higher bifurcation and length ratios but lower side-branch ratios.The upper reaches of the main stream of the Jinsha River feature gentle slopes and larger meander radii;the middle reaches have steep slopes and relatively straight channels,and the lower reaches show gentle slopes and smaller meander radii.As the length of the studied river segments increases,the average sinuosity,the range of sinuosity,and data dispersion all increase accordingly.Overall,an inverse relationship exists between river segment sinuosity and channel gradient.关键词
西南高山峡谷区/金沙江流域/河网/河流级别/自相似性/弯曲度Key words
high-mountain canyon region in southwest China/the Jinsha River Basin/river network/river level/self-similarity/sinuosity引用本文复制引用
关昊哲,冶运涛,顾晶晶,周政,曹引,蒋云钟..西南高山峡谷区金沙江流域河网结构特征[J].河海大学学报（自然科学版）,2026,54(2):9-17,9.基金项目
国家重点研发计划项目(2023YFC3209302-03) （2023YFC3209302-03）
国家自然科学基金项目(52279031) （52279031）
中国长江电力股份有限公司项目(Z432402001) （Z432402001）
北京市自然科学基金项目(JQ21029) （JQ21029）
