Evaluating short-term changes in recreational water quality during a hydrograph event using a combination of microbial tracers, environmental microbiology, microbial source tracking and hydrological techniques: a case study in Southwest Wales, UK

Water Research
Mark D WyerHeather Moore

Abstract

Quantitative assessment of multiple sources to short-term variations in recreational water quality, as indexed by faecal indicator organism (FIO) concentrations, is becoming increasingly important with adoption of modern water quality standards and catchment-based water quality management requirements (e.g. the EU Water Framework Directive, Article 11 'Programmes of Measures' and the US Clean Water Act, 'Total Maximum Daily Loads'). This paper describes a study combining microbial tracers, intensive FIO measurement, open channel hydrology and molecular microbial source tracking (MST) to enhance understanding of recreational water quality at Amroth in southwest Wales, UK. Microbial tracers were released from four stream inputs during a moderate hydrograph event. Tracers from two local streams impacted simultaneously with a period of maximum FIO concentrations at the near-shore compliance monitoring site. Connection between these inputs and this site were rapid (9-33 min). Water quality impairment from a more remote stream input followed, 12.85 h after tracer release, sustaining FIO concentrations above desired compliance levels. MST analysis showed dominance of ruminant Bacteroidales genetic markers, associated with agricultural...Continue Reading

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Citations

Apr 22, 2014·International Journal of Environmental Research and Public Health·Aude-Valérie JungMarie-Florence Thomas
Apr 30, 2016·Marine Environmental Research·Anisha KeswaniRichard S Quilliam
Jun 13, 2015·Environmental Monitoring and Assessment·David M OliverRichard S Quilliam
Apr 16, 2015·Microbial Biotechnology·Emma SevillaFernando Rojo
Jul 6, 2014·BMC Microbiology·Shengkun DongThanh H Nguyen

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