连云港疏浚工程的环境效应——以羊窝头抛泥区为例

Environmental Effect of Dredging Project in Lianyungang——Take Yangwoto Dumping Area as a Case

以连云港羊窝头抛泥区为研究区域 ,对疏浚工程中产生的大量疏浚弃土倾倒入海后 ,所产生弃土的堆积—流失—扩散过程以及海域环境效应 ,进行了现场观测和计算 ,并从物理、化学和生物 3个方面对海区的水质、底质和生态环境的影响作出客观分析。认为疏浚的环境效应主要取决于疏浚弃土本身的受污染程度 ,而对海域环境的影响 ,则主要是弃土扩散所造成的海水中悬浮沙量增加引起水质浑浊度的增高的物理性影响 ,同时由于弃土中大量的粘粒和胶粒物质具有吸附海水中重金属和有机物等污染物质的能力 ,有利于水质和生态环境的改善 ,因而对各类海洋生物生存环境的影响是十分轻微的。

In this paper, Yangwotou dumping area in Lianyungang is taken as the transportation and disporsion processes of dredged material that has been dumped into the sea and its influence on environment, and the physical, chemical and biological influences on local bottom sediment, water quality and ecosystem are also analysed objectively. It is shown from the above analysis results that the environmental impact of dredging project is mainly dependent on the characteristics and polluted extent of dredged materiel, and its impact on marine environment is mainly the physical effect of the increase in suspended solid content and turbidity of sea water due to the dredged material dispetsion, where as the viscous and colloidal particles in dredged material can absorb the heavy metal and pollutants in the seawater to improve the water quality and ecosystem, so the dredged material has slight impact on the living environment of different kinds of marine organisms.