Generic Guidance and Optimum Model Settings for the CALPUFF ...

Contents
SCOPE OF WORK AND BACKGROUND ................................................................................... 1
A.1 Introduction................................................................................................................ 1
A.2 Requirements of the NSW OEH ............................................................................... 1
1. INTRODUCTION .............................................................................................................. 3
2. GUIDANCE ON CALMET CONFIGURATIONS ........................................................... 4
2.1 Overview ..................................................................................................................... 4
2.2 General Guidance for CALMET.............................................................................. 4
2.2.1 CALMET Overview...................................................................................... 4
2.3 Methodologies for Running CALMET .................................................................... 5
2.3.1 No-Observations Approach ............................................................................. 6
2.3.2 Hybrid Mode.................................................................................................... 7
2.3.3 Observations Only....................................................................................... 10
2.3.4 Single Station Meteorology......................................................................... 11
2.3.5 Screening Model runs ................................................................................. 11
2.4 Prognostic-Derived Surface (SURF.DAT) and Upper (UP.DAT) files ............... 12
2.5 Seven Critical CALMET Parameters When Using Observations....................... 12
2.6 Other Important Parameters – Overwater Surface Fluxes and Mixing Heights13
3 RECOMMENDED MODEL OPTION SETTINGS FOR CERTAIN
CONDITIONS AND SCENARIOS ................................................................................. 17
3.1 Introduction.............................................................................................................. 17
3.2 Complex terrain ....................................................................................................... 17
3.2.1 Terrain Data ................................................................................................ 17
3.2.2 Choosing Grid Resolution and Model Domain Size................................. 18
3.2.3 Choosing a value for TERRAD.................................................................. 18
3.2.4 Complex Terrain Sub-Grid Scale Terrain Features (CTSG).................. 19
3.3 Shoreline Fumigation............................................................................................... 20
3.3.1 Sub-grid Scale TIBL ................................................................................... 20
3.4 Inversion Break-up Fumigation ............................................................................. 21
3.4.1. Description of how CALMET computes mixing height and its relevance to
properly modeling Inversion-breakup fumigation................................................ 22
3.5 Buoyant line plumes................................................................................................. 22
3.5.1 Entering Line sources into CALPUFF ...................................................... 24
3.5.2 Evaluation Studies....................................................................................... 27
3.6 Calm winds ............................................................................................................... 30
3.6.1 Sub hourly meteorological data and its usage in CALPUFF................... 31
3.6.2 User Options for treating Calms................................................................ 39
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