Details of Barry Plume Plotter

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

Stacks and buildings

Building measurements are taken from [2].

This image shows the layout of the stack and buildings modelled:

Stack measurements

All of these are taken from [1] except the stack location which is taken from [2]:

The following values are used for albedo, Bowen ratio and roughness length. None of these are specified in [1] or [2]:


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

PollutantEmission rate
per second
Oxides of nitrogen4.32 g
Particulates216 mg
TOC216 mg
Hydrogen chloride216 mg
Hydrogen flouride21.6 mg
Carbon monoxide1.08 g
Sulphur dioxide1.08 g
Ammonia108 mg
Cadmium and thallium1.08 mg
Mercury1.08 mg
Other metals10.8 mg
Dioxins and furans2.16 ng
PaHs21.6 μg
PCBs108 μg

Background levels

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

concentration per m3
Oxides of nitrogen20 μg
Particulates13.5 μg
TOC350 ng
Hydrogen chloride240 ng
Hydrogen flouride500 ng
Carbon monoxide140 μg
Sulphur dioxide2.2 μg
Ammonia990 ng
Cadmium and thallium300 pg
Mercury2 ng
Other metals54.49 ng
Dioxins and furans28.8 fg
PaHs330 pg
PCBs440 pg

Weather data

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

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


1. Proposed Wood Gasification Facility -- Woodham Road Barry -- Air Quality Assessment. Entran Ltd. 29/04/2016.

2. Stack Height Assessment for a 10 MWe Wood Gasification Facility at Barry Docks, Barry Island for Sunrise Renewables (Barry). Stopford Energy and Environment. 11/09/2014. Document filename "Appendix 2 - Air Emissions Analysis (2014).pdf".