Analysis of the effect of unsteady reservoir flow and sand excavation on the channel conditions of the Yangtze River (Yibin-Chongqing)

SN Applied Sciences

Shi-yu Zeng¹  Xin-yu Liu¹  Shuai-shuai Zhang²  Sheng-fa Yang² 

[1] Changjiang Chongqing Harbour and Waterway Engineering Investigation and Design Institute;National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University;

关键词: Yibin-Chongqing reach;    Unsteady flow mathematical model;    Propagation characteristics;    Sand mining;    Water level change;   

DOI  :  10.1007/s42452-022-05032-w

来源: DOAJ

【 摘 要 】

Article highlights This work improves the Preissmann implicit difference method to effectively simulate the propagation characteristics of unsteady flow in long reaches. The daily adjustment of unsteady flow in the upper reaches increases the river flow during the low-water period so that the designed water level under the action of this daily unsteady flow adjustment increases by approximately 0.19 m compared to that under normal conditions. A large number of point bars have been damaged in the wake of sand excavation in long reaches,resulting in a water level decline of approximately 0.5–2.0 m.

【 授权许可】

Unknown