深圳港西部港区进出港航道工程疏浚泥水抛泥沙输移扩散规律研究

Study on transmitting and spreading rules of dredging sediment of Shenzhen Western Port channel

针对深圳港西部港区拟新开辟的出海航道———铜鼓航道的疏浚泥海上倾倒对周围水沙环境的影响问题,通过建立二维潮流泥沙数学模型,对在拟选的水抛倾倒区内分别在有风或无风情况每天倒泥8次或12次共4种情况下的水抛疏浚泥的输移扩散与影响进行了模拟计算和研究.研究结果表明,在选定的抛泥区进行疏浚泥倾倒活动对周围环境的水深、航道、水环境的悬浮物浓度、水体滞留时间、沉积厚度、悬沙漂移距离等各项指标均影响不大,工程技术上合理可行.

In order to study the influence of the dredging mud dumping of Shenzhen Port Tonggu channel, a 2D tidal and sediment mathematical simulation model is established; different cases whether there is wind blowing or not and dumping the sediment 8 times a day or 12 times a day in the dumping area are discussed and studied. Research result shows that the dumping of dredging sediment will not make a great impact on the evaluation index including the suspending substance thickness, resorting time, aggradation thickness, sediment excursion distance, etc. So we can draw the conclusion that the dumping activity will not affect the water environment and water depth and other channels nearby greatly; it is appropriate from the point view of engineering technology.