围堰施工对湛江港海域水环境影响模拟

通过建立二维非稳态水动力模型,对湛江港局部海域潮流进行数值模拟。在潮流模拟验证正确的基础上,建立了悬浮物水质预测模型,预测了工程在水下作业过程中悬浮物浓度对海域水环境的影响,通过模型计算出悬浮物超标的面积等,从而分析了该工程施工对海域水质环境的影响。结果表明:工程围堰施工对周围200 m海域范围产生影响,浓度增量基本在10⁴00 mg/L之间,中心最高浓度达到400 mg/L,影响程度从中心向外递减。

Simulation of impact of cofferdam construction on water environment of Zhanjiang Bay

Through the establishment of two-dimensional unsteady hydrodynamic model of Zhanjiang port, this paper simulated the current for sea region of Zhanjiang port.Based on the verification of current,it established a suspended model of water quality prediction and forecasted the influences of suspended matter concentration on water environment in process of underwater work. It analyzed the impact of construction of the project on the sea water environment through calculating the area of exceeding the standard of suspended matter. The results show that the impact range of cofferdam construction is around 200 metersof sea field, the increment of concentration is from 10 to 400 mg/L, the highest concentration in center is 400mg/L and the extent of impact decreases from center to outside.