ABSTRACT
This chapter considers the models used and their performance. ACASA, developed by University of California-Davis, is a multilayer model that extends to 100 m above the canopy elements to ensure applicability of the turbulence assumptions. SUEWS allows both the energy and water balances at the neighbourhood scale to be calculated. The model combines the urban evaporation-interception scheme of Grimmond & Oke with the urban water balance model of Grimmond et al. The Building Energy Model implemented in TEB considers a single thermal zone, a generic thermal mass to represent the thermal inertia of the indoor materials, the heat gains resulting from transmitted solar radiation and the internal sources of heat, infiltration and ventilation. The SLUCM model is documented to systematically have a problem with the turbulent sensible heat fluxes, notably the ability to transfer heat between sensible and latent heat exchanges.
