Attachment 6 - Odour Impact Assessment - Katestone · 132005.638.06

                                          Wind speed                                    Temperature
               “Good”
 Statistic                                  Observational                                  Observational
                value      Benchmark                           TAPM       Benchmark                           TAPM
                                                data                                           data
              Close to
 IoA                           >0.6                    0.94                     >0.6                  0.95
                 1


A1.4 CALMET meteorological modelling configuration

CALMET is an advanced non-steady-state diagnostic 3D meteorological model with micro-meteorological modules
for overwater and overland boundary layers. The model is the meteorological pre-processor for the CALPUFF
modelling system. CALMET is capable of reading hourly meteorological data as data assimilation from multiple
sites within the modelling domain; it can also be initialised with the gridded three-dimensional prognostic output
from other meteorological models such as TAPM. This can improve dispersion model output, particularly over
complex terrain as the near surface meteorological conditions are calculated for each grid point.

CALMET version 6.5.0 was used to simulate meteorological conditions in the region. The CALMET simulation was
initialised with the gridded TAPM 3D wind field data from the 300 m grid. CALMET treats the prognostic model
output as the initial guess field for the CALMET diagnostic model wind fields. The initial guess field is then adjusted
for the kinematic effects of terrain, slope flows, blocking effects and 3D divergence minimisation.

CALMET was configured with the following selections:

    •    Modelling period from 1 January 2020 to 31 December 2020.

    •    120 x 120 grid point domain with 100 m resolution, nested within the TAPM inner domain.

    •    12 vertical levels at heights of 20, 60, 100, 150, 200, 250, 350, 500, 800, 1600, 2600 and 4600 metres.

    •    Prognostic wind fields generated by TAPM input as MM5/3D.DAT at surface and upper air for “initial
         guess” field (no-observations mode).

    •    Gridded cloud cover from prognostic relative humidity at all levels.

    •    No extrapolation of surface wind observations to upper layers.

Terrain radius of influence of 3.0 km.


A1.5 Summary of site meteorology

The following sections provide a description of the CALMET outputs as utilised in the CALPUFF dispersion
modelling for the meteorological parameters that are important for the dispersion of air pollutants in the atmosphere,
namely wind speed, wind direction, atmospheric stability, and mixing layer height. These parameters have been
extracted from the TAPM/CALMET dataset at the proposed development site.


A1.5.1 Wind speed and wind direction

The annual distribution of winds predicted by TAPM/CALMET for 2020 is presented in Figure A5. The seasonal
and diurnal distribution of winds are presented in Figure A6 and Figure A7, respectively.

Winds across the study area are predominantly light to moderate (up to around 5 m/s) and from the southeast to
south-southwest, with a slightly lower frequency from the north-northwest through to east-southeast direction. The
lowest frequency of winds occurs from the west to northwest direction.




 Katestone Environmental Australia Pty Ltd                                                        17 September 2026
 D25072-8 Noosa Council - Noosa Composting Odour Assessment - Final                                        Page 30