和畅洲汊道近期演变及航道整治方案设想

充分收集和畅洲汊道实测水文地形资料,分析了该河段河床演变特点和航道存在的主要问题及左汊口门控制工程的整治效果。在此基础上,结合该段航运发展需求和航道整治目标,提出航道整治方案设想,并就潜坝数量、不同坝间距和高程组合进行研究。分析表明,在和畅洲左汊已建潜坝的下游新建两道变坡潜坝,在增加右汊分流比的条件下,对右汊进口征润洲尾滩进行切滩,对右汊中下段航道狭窄处进行疏浚,能进一步改善右汊航道条件,该组合方案可作为下阶段重点研究方案。研究得到的河道演变特点、碍航特性分析及方案比选成果可为该段航道整治提供参考借鉴。

Study of recent river evolution and waterway regulation of Hechangzhou branch channel

Based on the hydrological and topographic field data collected from the Hechangzhou branch channel,this study focuses on the analysis of its river channel evolution and the main issues associated with its waterway;the effects of the control project on the left branch entrance of the Hechangzhou channel are also examined.According to the local shipping demand and waterway regulation target,in this study,a comprehensive river regulation scheme is also developed through considering different combinations of number,distance and elevation of submersible dams(plastic-sand-pillows).The proposed regulation scheme includes constructing two new slope-changing submersible dams in the downstream of the submersible dam which stands at the left branch of the Hechangzhou branch channel;cutting the tail shores of the Zhenrunzhou which is located at the right branch entrance of the Hechangzhou,under the condition of increasing the diversion ratio for the right branch;and dredging the narrow portions of the middle and lower reaches of the right branch of the Hechangzhou channel for improving the shipping conditions of the right branch.The proposed regulation schemes could be further explored in the next phase of research,and the results could provide a scientific base for regulating the Hechangzhou navigation channel effectively.