Take a look at this unique benchmark for improving urban flood models ...

Floods in urban environments cause substantial damage. Urban flood risk management requires a reliable knowledge of flood hazard, including the flow characteristics in urbanized floodplains. In a recent paper in the open-access journal NHESS, we present numerical simulations of flooding in an urban district and compare them against experimental observations obtained from a laboratory setup representing an urban district with 14 streets and 49 crossroads. The data provide a unique benchmark for other numerical models.

http://www.nat-hazards-earth-syst-sci.net/16/1413/2016/nhess-16-1413-2016.html