Attachment 6 - Odour Impact Assessment - Katestone · 132005.638.06

APPENDIX A                  METEOROLOGICAL AND DISPERSION MODELLING
                            METHODOLOGY

A1 Meteorology

The meteorological modelling methodology for the assessment included the following steps:

    •    Selection of a representative year

    •    TAPM modelling and validation

    •    CALMET modelling

The same meteorological input files to CALPUFF have been used as were used in a previous Katestone’s 2024
assessment (Katestone deliverable D23098-2). Refer to the previous report for details of the meteorological model
configuration.

The following sections describe each step of the meteorological modelling conducted. A summary of the
meteorological data generated is provided in Section A1.5.


A1.1 Selection of representative year

A representative year is required to be selected at the beginning of the meteorological modelling process. Using a
representative year in the air quality assessment ensures that the typical conditions experienced at the
development site are reflected in the model. Selection of a representative year has been done through statistical
analysis of historical meteorological observations at the Bureau of Meteorology (BoM) automatic weather station
(AWS) located at Tewantin. Meteorological observations from five years (2018 to 2022) at Tewantin were analysed
to assess the inter-annual variability.

Figure A1 presents annual wind roses for the five years and shows that inter-annual conditions are typically very
similar. Figure A2 presents frequency distribution plots for humidity, wind direction, wind speed, and temperature
and demonstrates that there is relatively little variation in the distribution of these variables year-on-year. Figure A3
presents Z-Scores for each variable for each year, these being a measure of the variation of values in each
individual year against the mean of values across all years.

The calendar year 2020 has been used for the modelling as it is judged to be the year with the least variation from
the mean when averaged across all of the parameters considered.




 Katestone Environmental Australia Pty Ltd                                                         17 September 2026
 D25072-8 Noosa Council - Noosa Composting Odour Assessment - Final                                         Page 25