This page should be read in conjunction with How Plume Plotter Works. It provides more details specific to the Rivenhall version of Plume Plotter.
Building measurements are taken from . This image shows the layout of the stack and buildings modelled. North is at the top; colours and numbers indicate the height of the buildings and the stack.
All of these are taken from  as modified by :
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  as modified by . These are:
|Oxides of nitrogen||10.31 g|
|Sulphur dioxide||5.156 g|
|Carbon monoxide||5.156 g|
|Hydrogen chloride||1.032 g|
|Hydrogen flouride||104 mg|
|Cadmium and thallium||2.062 mg|
|Other metals||51.56 mg|
|Dioxins and furans||10.31 ng|
The background levels of pollutants are taken from . These are:
concentration per m3
|Oxides of nitrogen||18.6 μg|
|Sulphur dioxide||6.2 μg|
|Carbon monoxide||301 μg|
|Hydrogen chloride||720 ng|
|Hydrogen flouride||2.35 μg|
|Cadmium and thallium||150 pg|
|Other metals||16.51 ng|
|Dioxins and furans||22.82 fg|
Weather data is taken from METAR reports from a local airport: Stansted.
Upper air data is the latest reported by the Herstmonceux upper air station.
1. GENT FAIRHEAD & CO: RIVENHALL DISPERSION MODELLING ASSESSMENT, Fichtner, July 2015.
2. GENT FAIRHEAD RIVENHALL IWMF ENVIRONMENTAL PERMIT VARIATION - SUPPORTING INFORMATION, Fichtner, December 2018.
3. GENT FAIRHEAD & CO: RIVENHALL DISPERSION MODELLING ASSESSMENT, Fichtner, May 2017.