Urban Drainage Modelling

We combine field data, GIS and advanced hydraulic software to simulate real-world flow behaviour from rooftop to river, so that flood mitigation and urban growth decisions rest on evidence.

Our modelling expertise

1. 1D/2D River Flood Models

   Coupled 1D channel and 2D floodplain models that simulate overbank flow, flood extents, depths and velocities for multiple return periods and climate scenarios. Used for floodplain mapping, bridge and culvert design, and setback analysis.

2. Stormwater Conveyance Modelling

   Detailed models of piped networks, open channels, culverts, inlets and detention structures to assess capacity and find bottlenecks, surcharging and flood hotspots. Includes design and optimisation of new and existing infrastructure, SuDS and nature-based solutions.

3. Wastewater Collection System Modelling

   Hydraulic models of foul and combined sewer networks to evaluate capacity, dry- and wet-weather performance, overflows and interactions with stormwater systems. Supports master planning, asset management and pollution control.

4. Urban Catchment Hydrological Modelling

   Rainfall-runoff models for highly impervious urban catchments that account for land use, soils, infiltration and antecedent conditions. Produces design hydrographs and catchment delineation, and assesses urbanisation and climate change impacts on runoff.