岸线变化对钦州湾污染物输移扩散的影响

【目的】分析岸线变化对钦州湾污染物输移扩散的影响,为钦州湾岸线开发、海洋环境保护提供科学依据。【方法】在2004-2012年岸线变化的基础上,利用MIKE21数学模型对钦州湾COD扩散进行模拟。【结果】低潮位时COD扩散面积大于高潮位时,小潮期间COD扩散面积大于大潮期间;岸线变化对钦州湾污染物输移扩散有一定影响,岸线变化后,金鼓江口COD扩散面积比岸线变化前稍大,三墩公路与犀牛脚之间COD浓度增量大于2mg/L的区域明显大于岸线变化前。【结论】合理开发利用岸线,对改善钦州湾污染物输运扩散,保护海洋环境具有十分重要的意义。

Impact of Shoreline Changes on the Pollutant Transport and Dispersion in Qinzhou Bay

Objective] To analyze the effect of shoreline changes on pollutant transport and dispersion can provide scientific basis for exploitation of coastline and marine environmental protection in Qinzhou Bay.Methods] Based on the change of shoreline from 2004 to 2012, the MIKE21 mathematical model was used to simulate the COD dispersion in Qinzhou Bay.Results] The COD dispersion area in low tide was greater than that in high tide, and in neap tide the COD dispersion area is larger than that in spring tide.The change of shoreline had a certain impact on the pollutant transport and dispersion in Qinzhou Bay, the dispersion area of COD in Jinguliang estuary was slightly larger than that before the change of shoreline, and the area where COD concentration increased more than 2 mg/L between Sandun road and Xiniujiao was significantly greater than that before the change of shoreline.Conclusion] Rational exploitation and utilization of shoreline is of great significance to improve the transport and dispersion of pollutants in Qinzhou Bay and protect the marine environment.