海河口淤积形态初步分析

Preliminary Analysis on Silting Characters at the Haihe River Mouth

本文通过实测资料分析了海河口的淤积形态及其主要成因，认为河口建闸３０年来，在径流量逐渐减小的条件下，潮汐水流是塑闸下淤积形态的主要动力，由于口外潮汐水流环流特性，对拦门沙前缘及其主槽的淤积有控制作用，闸下泄流冲刷和人工清淤，有助于维持近闸段深槽，并且始终具有一定的纳潮量，使得口外涨落潮进闸段的水流，在过渡段具有较大流速，其淤积高程也受到制约，这些条件对维持河口具有良好效果，基于上述认识。

In this paper,based on the analysis of field data,the sedimentation conditions at themouth of the Haihe River,and its patterns and causes of formation are studied.Some suggestions for taking the advantage of the favorable conditions to consolidate the realignmentof the mouth are also proposed.