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Climate change impact on the leaching of a heavy metal contamination in a small lowland catchment
Lookup NU author(s)
Michelle Van Vliet
Dr Stephen Blenkinsop
Visser A, Kroes J, van Vliet M, Blenkinsop S, Broers HP
Conference Proceedings (inc. Abstract)
Groundwater Quality Management in a Rapidly Changing World: Proceedings of the 7th International Groundwater Quality Conference
Year of Conference
13-18 June 2010
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The objective of this study was to assess the potential effects of climate change on the transport of a pre-existing spatially extensive trace metal contamination to a small lowland catchment in south of the Netherlands. The area surrounding the Keersop has been contaminated with heavy metals by the atmospheric emissions of four zinc ore smelters. This heavy metal contamination, with Cd and Zn for example, has accumulated in the topsoil and leaches towards surface water system, especially during high groundwater levels and high discharge rates. Simulated projections of future climate predict increased precipitation in winter, less precipitation in summer, and higher air temperatures throughout the year. These climate change scenarios projected lower groundwater levels and lower discharge rates. As a result of lower groundwater levels, transport of Cd and Zn towards surface water is also projected to decrease under future climate. These results indicate a positive effect of climate change on a limited aspect of surface water quality.
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