J
J. Crowther
Researcher at University of Wales, Lampeter
Publications - 39
Citations - 1567
J. Crowther is an academic researcher from University of Wales, Lampeter. The author has contributed to research in topics: Water quality & Water Framework Directive. The author has an hindex of 22, co-authored 38 publications receiving 1494 citations.
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Journal ArticleDOI
Faecal-indicator concentrations in waters draining lowland pastoral catchments in the UK: relationships with land use and farming practices
TL;DR: The findings suggest that it may be possible to develop generic statistical models to predict microbial water quality from land use and farm management data, and provide indirect evidence that channel bed sediment 'stores' closely reflect land use within their catchments and that there is little die-off of organisms along watercourses.
Journal ArticleDOI
Relationships between microbial water quality and environmental conditions in coastal recreational waters: the fylde coast, UK
TL;DR: The results suggest that, prior to the schemes, higher bacterial concentrations were strongly associated with rainfall; and sewage sources were important for TC and FC, but less important for FS, which may have been more strongly affected by diffuse catchment sources.
Journal ArticleDOI
Faecal indicator organism concentrations in sewage and treated effluents
David Kay,J. Crowther,Carl Michael Stapleton,Mark D. Wyer,Lorna Fewtrell,Anthony C. Edwards,Carol Francis,Adrian McDonald,John Watkins,J. Wilkinson +9 more
TL;DR: Very marked, statistically significant reductions in GM FIO concentrations result from secondary and tertiary treatment, and there are statistically significant differences between some secondary and some tertiary treatments.
Journal ArticleDOI
Faecal indicator organism concentrations and catchment export coefficients in the UK.
David Kay,J. Crowther,Carl Michael Stapleton,Mark D. Wyer,Lorna Fewtrell,Steven G. Anthony,M. Bradford,Anthony C. Edwards,Carol Francis,M. Hopkins,Christopher David Kay,Adrian McDonald,John Watkins,J. Wilkinson +13 more
TL;DR: Examples are presented to illustrate how the results can be used to estimate daily summer base- and high-flow FIO loads for catchments with different land use types, and to assess the likely effectiveness of certain strategies for reducing FIO pollutant loadings in areas with extensive areas of lowland improved pasture.
Journal ArticleDOI
Decay of intestinal enterococci concentrations in high-energy estuarine and coastal waters: towards real-time T90 values for modelling faecal indicators in recreational waters.
David Kay,Carl Michael Stapleton,Mark D. Wyer,Adrian McDonald,J. Crowther,Nigel D. Paul,Keith Jones,Carol Francis,John Watkins,J. Wilkinson,N. Humphrey,BinLiang Lin,L. Yang,Roger Alexander Falconer,S. Gardner +14 more
TL;DR: The results suggest that modelling turbidity and or suspended solids offers a potential means of predicting T90 values in 'real-time' for discrete cells of a hydrodynamic model, and suggest that enterococci decay in irradiated experiments with turbidity >200 NTU is similar to decay observed under dark conditions.