By Danny Reible, Tomáš Lánczos (auth.), Danny Reible, Tomas Lanczos (eds.)
Contaminated sediments pose the most tricky web site remediation matters. infected sediments more often than not stay in spatially variable and dynamic platforms topic to seasonal movement diversifications and episodic typhoon occasions. the quantity of sediments that needs to be controlled at specific websites usually exceeds 1000000 cubic meters, dwarfing many infected soil websites. those sediments also are linked to both daunting volumes of water and efforts to take away the illness commonly entrains much more water. The environmental protection of either NATO and companion international locations is in danger because of the pervasive nature of sediment illness of rivers, lakes and harbors. A NATO complex study Workshop used to be convened in Bratislava in could 2005 to debate present techniques to handling infected sediments and to spot examine essential to conquer remarkable difficulties.
In this article, drawn from shows and dialogue of that workshop, present ways to the review and remediation of infected sediments should be mentioned with the emphasis on in-situ administration. actual, chemical and organic techniques for the evaluate and remediation of sediments are all addressed. constructing regulatory and strategic techniques are highlighted with a different emphasis at the power for organic remediation for the administration of infected sediments.
Read Online or Download Assessment and Remediation of Contaminated Sediments: Proceedings of the NATO Advanced Research Workshop on Assessment and Remediation of Contaminated Sediments Bratislava, Slovak Republic 18–21 May 2005 PDF
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Additional resources for Assessment and Remediation of Contaminated Sediments: Proceedings of the NATO Advanced Research Workshop on Assessment and Remediation of Contaminated Sediments Bratislava, Slovak Republic 18–21 May 2005
Dredged-material management Many water and port managers face the continuous effort of dredging in order to maintain the required water depth. Europe-wide, the volume of dredged material is very roughly estimated at 200 million cubic meters per year. There are three types of dredging: capital, maintenance and remediation dredging. Capital dredging is for example for land reclamation, deepening fairways, etc. Maintenance dredging is mainly to keep waterways at a defined depth to ensure safe navigation, and remediation dredging is to solve environmental problems of contaminated sediments.
The first thing one notices when comparing these definitions is that the above definition of soil does not specifically exclude sediments. A further examination of the SedNet sediment definition reveals that all soils, during the weathering and transport process, have been sediments, and also suggests that they will be sediments again during their lifetime. Clearly, both soils and sediments often have a common origin – the weathering products of rocks and organic material. Generally, if they are deposited (or formed) in a terrestrial setting, they are considered soils, while if deposited in an aquatic setting they are considered sediments.
Look for solutions that respect natural processes and functioning. Management strategies for sediment should respect nature: working with nature, not against it. Thus it is crucial to use and improve our understanding of river system functioning and the role of sediment in the processes involved (see further under research recommendations). For instance, taking sediment out of the system can cause sediment deficits resulting in habitat loss and destabilization of river system functioning. Therefore, sediment management must also consider the sediment balance and its dynamic role in the hydrological and geomorphologic processes operating within each river.