CatchIS - Catchment Information System

Virtual Session

Surface water pesticides

Protecting the surface water source

The model SWATCATCH computes a time series flows and concentrations that can be expected at the catchment outlet / abstraction point following use of a specific compound on a specific crop. The results are compiled into a new Excel spreadsheet.

The SWATCATCH catchment time-series output
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You can also consider the likelihood of exceeding a given threshold. The Threshold spreadsheet in Excel may be used to give a probability of exceedence as a percentage given a user specified threshold concentration.

Data is also exported to MS Excel. From here the threshold exceedence probability can be explored
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Surface water hotspots

Identification of spatial risk

The surface water hotspots model allows you to identify hotspots within the catchment (or AOI) which are particularly vulnerable to a particular compound. The compound can either be applied everywhere, irrespective of cropping or land use (vulnerability potential), or utilise the actual landcover data from ADAS UK Ltd. to identify crop-specific hot spots.

Selecting the crop compound combination for the surface hotspots model in CatchIS, here IPU on Wheat
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The resultant surface areas hotspots map is produced, clipped to the area of interest (AOI)
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You can select which risk properties to focus on - here we restrict the results to the proportions of all areas of High risk
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The resultant surface areas hotspots map is produced, clipped to the area of interest (AOI)
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