%0 Journal Article
%T Channel Pattern Discrimination Based on the Relationship Between Channel Slope and Width<br>基于对Leopold-Wolman关系修正的河床河型判别
%A XU Jiongxin
%A <br>许炯心
%J 地理学报
%D 2004
%I 
%X The classic channel slope-discharge relationship proposed by Leopold and Wolman (1957) for channel pattern discrimination has been tested by a large database including 4 types of rivers: gravel-bed meandering, gravel-bed braided, sand-bed meandering and sand-bed braided rivers. The result shows that the Leopold-Wolman relationship cannot discriminate channel patterns well when both gravel- and sand-bed rivers are considered. It is indicated that the Leopold-Wolman relationship reflects the difference between gravel- and sand-bed rivers more than the difference between meandering and braided channel patterns. The channel width-bankfull discharge relationship for discrimination channel patterns of sand-bed rivers in China is also tested in this stud. The result shows that the channel width-discharge relationship discriminates channel patterns better than the slope-discharge relationship. To improve the Leopold-Wolman relationship, a diagram based on the channel slope-bankfull width relationship is proposed. This diagram shows that the slope-width plane is divided by two straight-lines into 4 areas, with each type of river located in each area. Hence, the two straight lines can be regarded as the thresholds between the 4 types of rivers: gravel-bed meandering, gravel-bed braided, sand-bed meandering and the sand-bed braided patternes.
%K channel pattern
%K gravel-bed river
%K sand-bed river
%K channel pattern discrimination<br>河型
%K 砾石河流
%K 沙质河流
%K 河型判别
%K 比降
%K 河宽
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=F7B5B947C24B9D649491012214E4BEF4&aid=5FAD8AEA06006B84&yid=D0E58B75BFD8E51C&vid=6AC2A205FBB0EF23&iid=38B194292C032A66&sid=8C5DE51F0A009A0F&eid=98494933359B55EC&journal_id=0375-5444&journal_name=地理学报&referenced_num=0&reference_num=18