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In recent years, there has been growing concern about the impact ofdiffuse source pollution on water bodies, particularly due to associated healthrisks. Coastal waters can receive considerable inputs of pollutants fromcatchments since they serve as sinks for many diffuse pollutants. Furthermore,bathing waters have in the recent past often failed to comply with the variousstandards set by different bathing water directives. The Severn estuary hasrecently attracted a lot of attention in terms of bathing water compliance due toits potential to generate a considerable amount of renewable energy for the UK.It is against this background that a physical model of the estuary has been setup in the Hydraulics Laboratory at Cardiff University, for studies to be undertakento mimic the conditions of the prototype. A sandbox filled with non-cohesivesediments within the laboratory has been set up to investigate the behaviour ofpollutants in propagating from the idealised groundwater environment into theestuarine waters. It has been demonstrated that for a semi-diurnal tidalestuary like the Severn, tides have a lesser effect on the transport of solutesthan flows from the catchments. Thus the impact of pollution from diffusesources to marine environments from catchments could be higher in less tidallydominated coastal waters than a tidal one.

KEYWORDS

Diffuse Source, Physical Model, Pollution, Severn Estuary, Tides

Cite this paper

Osei-Twumasi, A. and Falconer, R. 2014 Diffuse Source Pollution Studies in a Physical Model of the Severn Estuary, UK. Journal of Water Resource and Protection, 6, 1390-1403. doi: 10.4236-jwarp.2014.615128.





Autor: A. Osei-Twumasi1*, R. A. Falconer2

Fuente: http://www.scirp.org/



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