涉河工程群对防洪的累积影响研究

采用河道天然实测资料和实体模型试验相结合的方法,通过对长江下游镇扬河段的世业洲汉道段的研究,探讨了长江群体岸线开发利用对河段防洪累积影响.在对河道原型近20a水位分析的基础上,比较了同一观测站在近、远期2个不同阶段长江相同流量下的水位变化.结果表明,天然实测资料分析与模型试验得出的结论相近,涉河工程群对防洪的累积影响程度在同一个数量级别.各类涉水工程对河段整体水位的累积影响不是单个涉水工程影响的简单叠加.涉河工程群对防洪水位抬高影响的梯度,在长江来水量为多年平均流量及以下时较小(一般为3～5cma),在长江来水量大于平滩流量和多年洪峰平均流量时明显增大(一般为10～15cm).

The cumulative impact of river construction projects on flood control

Based on the combination of observed data analysis and physical model experiment,the cumulative impact of river construction projects on flood control was studied by discussion on the Shiyezhou reach in the Yangtze River.The data of river water level in nearly two decades were used to analyse the changes of different periods with the same observatory station and same flow discharge.The result of observed data analysis is similar to the one of physical model experiment,and their quantitive results about the ...