EAS offer flood modelling services to identify likely flood extents/depths and impact on a new or existing development.  The modelling programmes that are used by EAS included Flood Modeller, TUFLOW and HECRAS. These programmes are used to model simple channels to large complex river systems, floodplains and urban drainage systems.  Either 1D, 2D, or 1D-2D linked models of the channel and floodplain can be produced depending on the site requirements.