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### Edit Discharge-site Data

As the market data dialog enables users to enter site-specific substance data, the discharge-site data lets users edit treatment plant features for selected discharges. Therefore the discharge-site data dialog is the only dialog in the GREAT-ER user interface offering you editorial access to the geo-referenced attribute data. Please note that changes are only stored with the users local scenario data and not within the GREAT-ER catchment database itself.

When selecting the item Edit Discharge-site Data, the cursor shape changes to identify the new mode. After clicking on a discharge site, a dialog appears. The entries are separated into two sections: general discharge site parameter and data related to the elimination process.

The current GREAT-ER model system considers influent water from three separate "sources": domestic consumption, nondomestic use (this covers mainly industrial inputs) and run-off (e.g. from sealed areas). If only an overall value is available for treatment plants this should be entered as domestic flow. Please note that domestic flow is given in [litre / (capita day)], whereas nondomestic flow and run-off are considered as [cubic meter / second].

The section related to the elimination process enables users to specify a site-specific elimination rate to overwrite the general rate for the specified treatment plant. Additionally, users can specify the treated fraction of incoming sewage (e.g. in the case of a bypass). For analysing purposes, the type of treatment plant in general can be changed (to run "what-if simulations"). Please note that all treatment plants in the current GREAT-ER distribution are by default considered as their main treatment type (activated sludge or trickling filter) and primary settler. Please note furthermore that it is possible to specify a distribution for a general elimination rate, but not for a site-specific elimination rate.

Leaving the dialog the discharge data tool is still active.

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