李家沙水道切嘴工程对其分流比的影响

Effect of mouth-cutting project at Lijiasha on diversion ratio

分析了李家沙水道工程前大水高潮期间分流比和有关水力参数实测资料以及工程后的试验数据,在此基础上,建立了工程前后分流比与动量因子间的函数关系,给出了相应的经验公式.研究表明,切嘴工程后分流比变化除受沙湾水道弯道水流影响外,还与下游磨碟头断面卡水作用有关.

Based on a comparison of the diversion ratio at Lijiasha during the hightide period and some related hydraulic parameters measured before the start of the mouthcutting project with the experimental data after the completion of the project, the functional relations between the diversion ratio and momentum factor before and after the project were established, and some empirical formulas were derived. The research shows that the diversion ratio at Lijiasha after the completion of the project is not only affected by the flow from the bending Shawan waterway, but also related to the water retaining of the lower Modietou section.