【摘要】 通过建立丁字湾三维潮流模式、污染物输运模式计算了该湾 COD浓度分布 ,定量分析了丁字湾的水交换能力 ,较为精确地计算出丁字湾内水交换率和水交换半更换期的空间分布。计算结果表明 ,当湾中部水交换 50 %时 ,湾口水交换达 80 % ,湾底仅为 2 0 %～ 40 % ;丁字湾湾口的半更换期为 1～ 5d,湾中部为 1 8～ 2 0 d,湾顶为 2 4～ 32 d。更多还原

【Abstract】 The sea water exchange capacity of Dingzi Bay is quantitatively analysised by using a numerical model including a three-dimensional tidal model and a pollutant transport model. By numerical computation, this model gives the distribution of sea water exchange rate and semi-exchange period in Dingzi Bay with higher precision. The results show that the exchange rate is about 20%～40% in the head of the bay ,80% in the mouth and 50% in the middle . The semi-exchange period is 24～32d in the head ,18～20d in the middle, while it is 1～5d in the mouth area.更多还原