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ENVIRONMENTAL IMPACT OF INCREASING TURBIDITY ON THE RELOCATION GROUNDS AT THE COAST OF BELGIUM: THE USE OF NEW MONITORING TECHNIQUES.
| 题名： | ENVIRONMENTAL IMPACT OF INCREASING TURBIDITY ON THE RELOCATION GROUNDS AT THE COAST OF BELGIUM: THE USE OF NEW MONITORING TECHNIQUES. |
| 作者： | S. CLAEYS; G. DUMON; J. LANCKNEUS; Magelas, Belgium |
| 关键词： | ENVIRONMENTAL IMPACT ; TURBIDITY |
| 摘要： | The environmental impact, caused by the increasing turbidity during relocation operations on the relocation grounds Br & W Zeebrugge Oost and Br & W S1, was evaluated as a part of the MOBAG 2000 project, together with the evaluation of the eco-toxical and chemical influences on the environment. MOBAG 2000 – a monitoring project for the maintenance dredging operations in the Belgian coastal harbours and waterways – aims at the execution of an environmental evaluation of the dredging and relocation operations, taking into account the Best-Environmental Practice philosophy as mentioned in the OSPAR directives of 1992. The distribution of the background turbidity in the water column is the result of a complex interaction of the meteorological and tidal parameters and can only be visualised by the use of new monitoring techniques. The annual anthropogenic turbidity increase at the relocation ground of Zeebrugge occupies only 3 % of the total measured turbidity. This conclusion was reached at the end of a mobile monitoring programme performed to visualise and estimate sediment plumes during relocation. Together with a stationary monitoring campaign, the sediment plumes were evaluated against the natural background over a period of 4 months in the framework of a stationary monitoring campaign. A combination of an acoustical backscatter sensor (Nortek Doppler Profiler) together with backscatter turbidity sensors was used during both stationary and mobile campaigns. Considering the distribution of a turbidity plume in time and space, these temporary turbidity increases did not have any significant harmful effects on a number of tested organisms. Based on results of this project, it can be concluded that the dredging operations at the relocation sites Br & W Zeebrugge Oost and Br & W S1 have no harmful influence on the environment, when working with non-contaminated sediments. |
| 总页数： | Proceedings of the 30th PIANC-AIPCN Congress. Sydney Australia. 22-26 Sept. 2002. pp11 |
| 报告类型： | 科技报告 |
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