Details of Coatbridge Plume Plotter

This page should be read in conjunction with How Plume Plotter Works. It provides more details specific to the Coatbridge version of Plume Plotter.

Stacks and buildings

Building measurements are taken from [1]. 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.

Stack measurements

These are taken from [1]:

Stack location: 55.839984,-4.0066210.
Stack height: 80 m.
Stack diameter: 1.9799 m.
Stack gas exit velocity: 18.6 m/s.
Stack gas temperature: 128 °C.

The following values are used for albedo, Bowen ratio and roughness length. The "urban option" of AERMOD was used, with the urban roughness as specified in [1]:

Albedo: 0.2.
Bowen ratio: 1.
Roughness length: 0.1.
Urban roughness length: 1.0.
Urban population: 600000.

Emissions

The emission rates of pollutants are taken from [1]:

Pollutant	Emission rate per second
Oxides of nitrogen	11.18 g
Particulates	559 mg
Sulphur dioxide	2.795 g
Carbon monoxide	2.795 g
Hydrogen chloride	559 mg
Hydrogen flouride	55.9 mg
VOCs	559 mg
Cadmium & Thallium	2.795 mg
Mercury	2.795 mg
Other metals	27.95 mg
Dioxins and furans	5.59 ng

Background levels

The background levels of pollutants are taken from [1]:

Pollutant	Background concentration per m³
Oxides of nitrogen	16 μg
Particulates	13.1 μg
Sulphur dioxide	N/A
Carbon monoxide	N/A
Hydrogen chloride	N/A
Hydrogen flouride	N/A
VOCs	N/A
Cadmium & Thallium	N/A
Mercury	N/A
Other metals	N/A
Dioxins and furans	N/A

Weather data

Weather data is taken from METAR reports from a local airport: Glasgow.

Upper air data is the latest reported by the Albemarle upper air station.

References

1. North Lanarkshire Bio Power Ltd. -- Atmospheric Dispersion Modelling of Emissions from an Advanced Thermal Treatment Facility. GFE. July 2017.