Source assessment of metals for catchment management under the EU Water Framework Directive

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Title: Source assessment of metals for catchment management under the EU Water Framework Directive
Authors: Chon, Ho-SIk
Item Type: Thesis or dissertation
Abstract: The implementation of the EU Water Framework Directive (2000/60/EC) (WFD), enacted to monitor and recover the quality of water bodies, is a good example of catchment management requiring a wider scope of understanding with regard to the chemical, ecological and quantitative status of river catchments. It has caused water management to shift from a local to a river basin scale and therefore requires a better understanding of emission sources of dangerous substances and their contribution to water quality at the catchment level. Metals include dangerous substances of continued and growing concern. The hazardous properties of metals reflect their ability to substitute for essential elements in biological systems, resulting in a disturbance of the biological functions of animals and humans. This thesis aimed to identify ways of assessing sources of metals at the catchment level for the implementation of the WFD. Different approaches were proposed to estimate impacts of emission sources on levels of metals in water bodies. Potential anthropogenic sources of metals and metalloids in receiving waters were identified at the catchment level. Of the metal sources, effluents from wastewater treatment plants, sediments in a water body and diffuse metal sources were selected in order to further evaluate their contributions to the quality of water bodies, using or developing simple methods to estimate these. Case studies demonstrated the effectiveness and reliability of the calculations used. Overall findings of the work highlighted the need to identify all the pressures of pollutant inputs and to assess their relative importance to the deterioration of water quality for compliance with the WFD. To this end, it is recommended that source assessment should be incorporated into the process of river basin management under the WFD. Source assessment can facilitate the performance of water management stages and the improvement of the quality of surface water bodies.
Issue Date: Mar-2012
Date Awarded: Apr-2012
Supervisor: Voulvoulis, Nick
Department: Centre for Environmental Policy
Publisher: Imperial College London
Qualification Level: Doctoral
Qualification Name: Doctor of Philosophy (PhD)
Appears in Collections:Centre for Environmental Policy PhD theses

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