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In recent years, numerous methods have been developed to identify the sources of suspended solids and the dynamics of sediment transport in rivers. These methods, which vary greatly in the spatial scales at which they can be applied, include; (1) fine sediment risk modelling, (2) sediment load water quality sampling, (3) sediment-focused river walkover surveys, and (4) source apportionment using fluorescent, chemical and genetic signatures.
The integration and assessment of these different sources of evidence helps us to quantify the scale of the pollutant pressure being exerted on an ecosystem, characterise from where in the catchment it is being derived and to target the delivery of a programme of catchment management interventions.
Though adopting this evidence-led approach we hope to catchment create plan that is; (1) strategically targeted and timed to achieve the greatest amount of benefit, (2) integrated to adopt a blend of different measures tailored to each situation and objective, (3) fully costed and funded by the most appropriate stakeholder, and (4) balanced to deliver improvements for the river, but not at the expense of food production or the farmer’s business.
In this presentation, Nick Paling from the Westcountry Rivers Trust describes how they have generated pollutant risk maps using the SCIMAP modelling framework and how these maps have been incorporated into the data and evidence they use to target and tailor their catchment management plans in the South West of England.