水利水电科技进展2017，Vol.37Issue(2)：7-13,87,8.DOI:10.3880/j.issn.1006-7647.2017.02.002
中国冲积大河的河型分布与成因
Distribution and formation of river patterns of large alluvial rivers in China
摘要
Abstract
The distribution of patterns of large alluvial rivers in China and the reason for their formation were analyzed based on remote sensing images, field survey data, hydrological data, and sediment data. Alluvial reaches of rivers in China are mainly meandering and braided reaches, while some local reaches are anabranching and anastomosing reaches. With the general and special characteristics of the distribution of river patterns taken into account, three critical factors are considered to be the main reasons for the formation of river patterns; the relative sediment transport rate ( the ratio of the incoming sediment load to the sediment transport capacity) , the relative riverbank erosion shear stress ( the ratio of near-bank flow shear stress to the critical erosion-resistant shear stress of the river bank) , and control of valley terrain ( e. g. , the valley node and channel width) .关键词
冲积大河/河型分布/弯曲河流/辫状河流/分汊河流/网状河流Key words
large alluvial river/river pattern distribution/meandering river/braided river/anabranching river/anastomosing river分类
建筑与水利引用本文复制引用
李志威,刘晶,胡世雄,田世民,潘保柱..中国冲积大河的河型分布与成因[J].水利水电科技进展,2017,37(2):7-13,87,8.基金项目
国家自然科学基金(91547112,91647118) （91547112,91647118）
湖南省教育厅资助科研项目(16B010) （16B010）
