HYDRODYNAMIC CHARACTERISTICS OF DAPENG BAY AND ITS ECOLOGICAL AND ENVIRONMENTAL EFFECTS

The hydrodynamic characteristics of Dapeng Bay and its ecological and environmental effects are studied by analyzing the historical investigation data and using the method of numerical simulation. The results show that the current velocity in Dapeng Bay is small, generally 0.10m·s-1; and the nearshore velocity is 0.05 m·s-1. The residual current is a cyclonic circulation in summer, and an anticyclonic circulation in other seasons. Under such hydrodynamic conditions, the pollutant concentration exhibits a decreasing trend from inbay to outbay and from alongshore to farshore. The water quality in the north part of Shatoujiao and Yantian and near Tolo Harbor is the worst. The Tolo Harbor is possibly the source of red tidal organisms of Dapeng Bay, which spread to the middle and north part of Dapeng Bay driven by the clockwise residual current in spring. 