Abstract: The Daxuetan shoals in the Jingsha River are the key controlling river reach for increasing the discharge capacity of waterway from Shuifu to Yinbin in the Changjiang River.It is adjacent to the confluence of the Jinsha River and the Minjiang River.Based on the measured data and the physical model tests,this paper analyzes the features of flow and river channel process,reveals the causes and navigation hindering property of every shoal,and points out that the Daxuetan shoals,consisting of Qishoutan shoal,Da...