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dc.contributor.authorOliver, Daviden_UK
dc.contributor.authorPage, Trevoren_UK
dc.contributor.authorHodgson, Chris Jen_UK
dc.contributor.authorHeathwaite, A Louiseen_UK
dc.contributor.authorChadwick, Dave Ren_UK
dc.contributor.authorWinter, Michaelen_UK
dc.description.abstractThis paper draws on lessons from a UK case study in the management of diffuse microbial pollution from grassland farm systems in the Taw catchment, southwest England. We report on the development and preliminary testing of a field-scale faecal indicator organism risk indexing tool (FIORIT). This tool aims to prioritise those fields most vulnerable in terms of their risk of contributing FIOs to water. FIORIT risk indices were related to recorded microbial water quality parameters (faecal coliforms [FC] and intestinal enterococci [IE]) to provide a concurrent on-farm evaluation of the tool. There was a significant upward trend in Log[FC] and Log[IE] values with FIORIT risk score classification (r2 ¼ 0.87 and 0.70, respectively and P < 0.01 for both FIOs). The FIORIT was then applied to 162 representative grassland fields through different seasons for ten farms in the case study catchment to determine the distribution of on-farm spatial and temporal risk. The high risk fields made up only a small proportion (1%, 2%, 2% and 3% for winter, spring, summer and autumn, respectively) of the total number of fields assessed (and less than 10% of the total area), but the likelihood of the hydrological connection of high FIO source areas to receiving watercourses makes them a priority for mitigation efforts. The FIORIT provides a preliminary and evolving mechanism through which we can combine risk assessment with risk communication to end-users and provides a framework for prioritising future empirical research. Continued testing of FIORIT across different geographical areas under both low and high flow conditions is now needed to initiate its long-term development into a robust indexing tool.en_UK
dc.relationOliver D, Page T, Hodgson CJ, Heathwaite AL, Chadwick DR & Winter M (2010) Development and testing of a risk indexing framework to determine field-scale critical source areas of faecal bacteria on grassland. Environmental Modelling and Software, 25 (4), pp. 503-512.;
dc.rightsPublished in Environmental Modelling and Software by Elsevier. Environmental Modelling and Software, Volume 25, Issue 4, April 2010, pp. 503 - 512. doi:10.1016/j.envsoft.2009.10.003en_UK
dc.subjectDiffuse pollutionen_UK
dc.subjectE. colien_UK
dc.subjectWater qualityen_UK
dc.subjectCritical source areaen_UK
dc.subjectFaecal indicator organismen_UK
dc.subjectExpert knowledgeen_UK
dc.subjectGrassland ecology Englanden_UK
dc.subjectWater quality biological assessmenten_UK
dc.subjectWater Pollutionen_UK
dc.titleDevelopment and testing of a risk indexing framework to determine field-scale critical source areas of faecal bacteria on grasslanden_UK
dc.typeJournal Articleen_UK
dc.citation.jtitleEnvironmental Modelling and Softwareen_UK
dc.type.statusAM - Accepted Manuscripten_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationLancaster Universityen_UK
dc.contributor.affiliationNorth Wyke Researchen_UK
dc.contributor.affiliationLancaster Universityen_UK
dc.contributor.affiliationNorth Wyke Researchen_UK
dc.contributor.affiliationUniversity of Exeteren_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorOliver, David|0000-0002-6200-562Xen_UK
local.rioxx.authorPage, Trevor|en_UK
local.rioxx.authorHodgson, Chris J|en_UK
local.rioxx.authorHeathwaite, A Louise|en_UK
local.rioxx.authorChadwick, Dave R|en_UK
local.rioxx.authorWinter, Michael|en_UK
local.rioxx.projectInternal Project|University of Stirling|
local.rioxx.filenameEMS_Oliver et al_text__FINAL41.pdfen_UK
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