钱塘江河口碍航浅滩演变的统计分析及整治预报

Statistical Analysis of Shoal Process and the Prection of Regulating for Qiantang Estuaury

钱塘江河口河床冲淤多变,主槽摆动频繁,其演变规律甚为复杂,故航行条件差。本文在对钱塘江河口通海航道上一个主要碍航浅滩的演变及整治效果的研究中,利用了近四十年来积累的实测水文地形资料,进行统计分析,得到了浅滩高程及航道水深的计算关系式,并将其用于选定该浅滩段整治河宽及对整治后浅滩水深增值的预测,经与理论关系进行比较,得到了较为满意的结果。

Aggradation and degradation occur frequently in the Qiantang Estuary, its main channel is shoal and shifty, and fluvial process is quite complicated so the nevigating condition is abominable.Based on the hydrographic and topographic data accumulated in several decades, some quantitative expressions on the shoal level and water depth in the reach were found by means of statistical method, and used to the research of the regulation projects and the prediction of the effect of training works at the main shoal in the waterway of the Qiantang Estuary. The results agree well with that calculated using hydraulic equations.