Table D-2. Albedo for Various Land Uses  Table D-3. Bowen Ratio for Various Land Uses  80$_{ }$ Source: EPA,  User’s Guide for the AERMOD Meteorological Preprocessor (AERMET) , http://www.epa.gov/ttn/scram/metobsdata_procaccprogs.htm#aermet .  November  2004, The Bowen ratio, an indicator of surface moisture, is the ratio of the sensible heat flux to the  latent heat flux. Although the Bowen ratio can have significant diurnal variation, it is used to  determine the planetary boundary layer parameters for convective conditions  Table D - 3  ( Bowen Ratio for Various Land Uses ) provides typical Bowen Ratio for a variety of land uses  and moisture conditions. A typical airport environment has a Bowen Ratio of 2.0 but it varies by  season and surface moisture conditions.  Surface Type  Winter  Spring  Summer  Autumn  Dry Conditions  Water  2.0  0.1  0.1  0.1  Deciduous Forest  2.0  1.5  0.6  2.0  Coniferous Forest  2.0  1.5  0.6  1.5  Swamp  2.0  0.2  0.2  0.2  Cultivated Land  2.0  1.0  1.5  2.0  Grassland  2.0  1.0  2.0  2.0  Urban  2.0  2.0  4.0  4.0  Desert Scrubland  10.0  5.0  6.0  10.0  Average Conditions  Water  1.5  0.1  0.1  0.1  Deciduous Forest  1.5  0.7  0.3  1.0  Coniferous Forest  1.5  0.7  0.3  0.8  Swamp  1.5  0.1  0.1  0.1  Cultivated Land  1.5  0.3  0.5  0.7  Grassland  1.5  0.4  0.8  1.0  Urban  1.5  1.0  2.0  2.0  Desert Scrubland  6.0  3.0  4.0  6.0  Wet Conditions  Water  0.3  0.1  0.1  0.1  Deciduous Forest  0.5  0.3  0.2  0.4  Surface Type  Winter  Spring  Summer  Autumn  Urban  0.35  0.14  0.16  0.18  Desert Scrubland  0.45  0.30  0.28  0.28  APPENDIX D$_{ }$