和畅洲汊道深水航道整治右汊水动力改善措施分析

在分析长江下游镇扬河段和畅洲水道水沙特性和目前航道条件的基础上,利用最新的实测枯季地形资料,建立和畅洲水道平面二维水流数学模型,计算多种整治思路不同工程措施下,作为通航汊道右汊的水动力因子分流比和流速的增加情况,分析比较各类工程措施的整治效果和利弊,明确应以左汊布置2道潜坝为治理措施研究的主要方向,为12.5 m深水航道建设提供技术依据。

Hydrodynamic improvement measures of channel regulation of the right branch of Hechangzhou waterway

A 2D numerical flow model based on the latest dry season topography is established after analyzing the flow and sediment characteristics and the deepwater navigation channel condition of the Hechangzhou waterway.The increase of the diversion ratio and the velocity in the right branch which represents the effects of many engineering measures from different regulation schemes are calculated.According to the results,the regulation effects and advantages/disadvantages of different regulation measures are compared.Finally,this paper clarifies that constructing two submerged dikes located at the upper section of the right branch should be the leading idea to regulate the Hechangzhou waterway channel.The conclusion can be the reference for construction of 12.5 m deepwater channel.