黄河下游堤防工程设计防洪水位计算方法探讨

On the calculating method of design flood level of the dikes along the lower Huanghe River

在分析实测资料的基础上,本文对变动河床水面线计算中的设防流量、控制断面、过水断面的冲淤变化及断面平均流速计算等问题进行了分析,并建立了经验关系式。具体介绍了用水力因子法计算水位、流量关系的方法和步骤,通过验证核算,较符合实际。文章还介绍了水位相关法、冲淤改正法二种简便的估算方法,在断面形态变化不大,各河段冲淤变化比较均匀时,也可得到令人满意的结果。

The paper discussed the problems on design flood discharge. the control section, change of flow section due to scouring or silting and the calculation of mean velocity of flow through a section on a course with a mobile bed. and established a experimental formula for calculating the level and discharge on the course based on measured data. The method and steps for calculating level and discharge by the Hydraulic-factor Method have been described in detail, with a checking example which shows that the method suites basically to the practical condition. Another two simple and convenient methods. the level correlation method and scour-silting method. can give out satisfying calculated results too for these section with little change and uniform scour-silting.