This page should be read in conjunction with How Plume Plotter Works. It provides more details specific to the Waterbeach version of Plume Plotter.
Building measurements are taken from . This image shows the layout of the stack and building modelled. North is at the top; colours and numbers indicate the height of the buildings and the stack:
These are taken from . Note that the two flues are combined into a single larger stack here:
The following values are used for albedo, Bowen ratio and roughness length. Roughness length is as specified in :
The emission rates of pollutants are taken from :
|Oxides of nitrogen||10.7 g|
|Sulphur dioxide||2.676 g|
|Carbon monoxide||2.676 g|
|Hydrogen chloride||535.1 mg|
|Hydrogen flouride||53.51 mg|
|Cadmium and thallium||2.676 mg|
|Other metals||26.76 mg|
|Dioxins and furans||5.351 ng|
The background levels of pollutants are taken from :
concentration per m3
|Oxides of nitrogen||15.08 μg|
|Sulphur dioxide||8.67 μg|
|Carbon monoxide||315 μg|
|Hydrogen chloride||710 ng|
|Hydrogen flouride||2.35 μg|
|Cadmium and thallium||300 pg|
|Other metals||30.09 ng|
|Dioxins and furans||33 fg|
Weather data is taken from METAR reports from a local airport: RAF Mildenhall.
Upper air data is the latest reported by the Nottingham upper air station.
1. Environmental Statement V3 App 8.1: Baseline Review. Fichtner. October 2017.
2. Environmental Statement V3 App 8.2: Process Emissions Modelling. Fichtner. December 2017.