Author(s): Yonghui Zhu, Ming Tao, Li Huang, Lihua Gu
Linked Author(s): Yonghui Zhu
Keywords: The Three Gorges Project, physical model tests, fluvial process, river regime, Yangtze River
Abstract: Construction and operation of the Three Gorges Project (TGP) and the upstream Xiluodu Project (XLDP) and Xiangjiaba Project (XJBP) in the Yangtze River have already changed and will further change the flow and sediment process of the downstream river, and consequently bring far-reaching impacts to the fluvial process of the downstream channel. In this study, physical model tests are performed to predict the scour and siltation of the downstream river channel from Yangjianao to Beinianziwan after joint operation of the three gigantic projects, and to predict the tendency of river regime development as well. Results of the physical model tests indicate that, from 2011 to 2022, significant scour (amount 1. 61�108m3 or averaged scour depth 1. 12m) occurs to the river channel from Yangjianao to Beinianziwan. The thalweg of the channel shows a general tendency of scour and down cutting, and the river bed near the bank where thalweg closely nestling against suffers significant scour. The overall river regime of the investigated river reach does not change very strongly during the modeling period, despite of the significant scour arisen. However, relatively significant adjustment of the river regime occurs locally at certain sub-reaches
Year: 2017