Fluvial geomorphology of the Middle Reach of the Huai River

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• 作者：Bang-yi YU^a ; Peng WU^b ; Jue-yi SUI^c ; ^{jueyi.sui@unbc.ca" class="auth_mail} ; Xing-ju YANG^d ; Jin NI^d
• 关键词：Braided channel ; Dominant discharge ; Huai River ; Channel pattern
• 刊名：International Journal of Sediment Research
• 出版年：March, 2014
• 年：2014
• 卷：29
• 期：1
• 页码：24-33
• 全文大小：4301 K

文摘

The Middle Reach of the Huai River (MRHR) flows northeast into the Hongzehu Lake. Before entering the Hongzehu Lake, the Huai River has a braided channel which is shallow and wide, and the riverbed has a negative slope. Based on the characteristics of the MRHR, this river reach can be divided into the following sections: a quasi-straight (or mildly curved) section, a bend section, and a braided section. The majority of the MRHR is quasi-straight. In this paper, several parameters are used to assess the geomorphology of the MRHR. Statistical analyses are performed to establish a relationship between the span length 鈥溾€淟鈥濃€?and channel width 鈥溾€淏鈥濃€?for different channel patterns. The relationship between the meandering length 鈥溾€淪鈥濃€?and bankfull channel width 鈥溾€淏鈥濃€?is also derived. Results indicate that the bankfull channel width 鈥溾€淏鈥濃€? the bankfull cross sectional area 鈥溾€淎鈥濃€?and the average flow depth 鈥溾€淗鈥濃€?are mainly dependent on the dominant discharge in the channel. A relationship is derived that describes the dependency of the curvature radius 鈥溾€淩鈥濃€?on the dominant discharge 鈥溾€淨鈥濃€? water surface slope 鈥溾€淛鈥濃€?and the turning angle 鈥溾€溛扁€濃€?