Impacts of coupling urban canopy model on storm simulation

Urbanization has significant impacts on atmospheric composition on scales from local to global through changing the components of the water and energy cycle and modifying ecosystems. Detailed modeling of energy and momentum processes in the urban regions is increasingly more important to weather research and its forecasting models. This study introduced the impervious ratio extracted from Landsat TM data into the parameterization scheme of an urban canopy model( UCM),and examined the impacts of coupling UCM on storm simulation accuracy using a bulk parameterization approach within the framework of the state-of-the-art WRF( Weather Research and Forecasting,Version 3. 3). Results indicate that this coupling model could produce some improvement on the simulation of area,volume and maximum intensity of rainfall,in comparison with the bulk parameterization approach considering only the roughness height or albedo of urban area. The results would provide reference for further study in urban storm research and forecasting.