The need for overland flow analysis has grown considerably in recent years with more pressure now placed on engineers to show suitable surface water management under extreme rainfall events. MicroDrainage’s 2D analysis module, FloodFlow, enbles users to perform this type of analysis and has received some significant changes as part of the 2019 release.
A new methodology, using local-inertial terms, has been included in FloodFlow’s analysis which is able to provide a closer solution to the full Shallow Water Equations (SWE) under the vast majority of surface water flooding conditions.
MicroDrainage 2019.1 also improves the resolution at which the 2D model can be solved, in both FloodFlow and MDSuDS, by enabling analysis at grid cells sizes down to 0.25m resolution. This enables a whole new level of detail to the analysis from previous versions. For example, rather than just being able to identify that a road is used as an exceedance flow path route, it’s now possible to look precisely at exactly how that road will be utilised: for example, will the flooding occupy one or two lanes and which lanes will they be?