挖泥船疏浚悬浮物源强及环境影响对比分析

疏浚是当前港口、航道开发维护及海洋工程建设中最常见的作业方式之一,疏浚产生的悬浮物污染也是环境影响分析评价关注的重点问题。对疏浚作业常用的绞吸式、耙吸式、抓斗式三种不同类型挖泥船施工环境影响因素及其悬浮物污染源强的综合比较分析,结果表明,在同等疏浚效率下,三种不同挖泥船对环境的影响及其产生悬浮物强度大小为抓斗式挖泥船>耙吸式挖泥船>绞吸式挖泥船,建议在使用疏浚船舶时优先选择悬浮物发生量较小的绞吸式挖泥船。

Dredging is one of the most common construction ways in the current port,waterway development and maintenance and marine engineering,suspended solids pollution caused by dredging is also the focus of environmental impact assessment. Comparison and analysis of environmental impact factors and suspended solid pollution sources of three common dredger in type of cutter suction,trailing suction and grapple showed that under the same dredging efficiency,the impact of the three different dredgers on the environment and the strength of the suspended solids were as follows:grapple > trailing suction > cutter suction,it was suggested that cutter suction dredger with less suspended solids should be preferred used in dredging.