The City Catchment Analysis Tool (CityCAT) is a 2-D hydrodynamic flood model, that models complex free-surface flow over a domain, capturing permeable and impermeable surfaces and obstacles to flow such as buildings and other man-made features.

Glenis, V., Kutija, V., & Kilsby, C. G. (2018). A fully hydrodynamic urban flood modelling system representing buildings, green space and interventions. Environmental Modelling & Software, 109, 272-292. https://doi.org/10.1016/j.envsoft.2018.07.018