Ecospan Environmental staff have over thirty five years of experience in modelling the aquatic environment. This has included developing models for many of the UK estuaries such as the Tees BELPLUME model. In 2011 a model was developed for the Tees Estuary and Tees Bay incorporating Dabholm Gut, Billingham Beck and barrage and slalom operation.
The company offers full 3-dimensional hydrodynamic modelling for estuaries, coastal areas, rivers, canals and lakes. The modelling can allow for varying tidal conditions, salinity stratification, temperature effects and the influence of winds from varying directions.
Modelling work is usually supported by field data collection (Hydrographic Surveys) to provide the baseline data necessary for building the model (e.g. water depths, tidal elevations) and to provide data for subsequent model validation (e.g. tidal flow measurements, plume measurements with dye tracer and/or parameter measurements such as temperature).
Hydrographic modelling is an integral part of many environmental impact assessments. Typical applications include:
- Modelling of potential spill scenarios (e.g. for COMAH) and ecological impact assessments (e.g. MATTE)
- Modelling effluent discharges (e.g. for environmental permitting, IPPC)
- Thermal plume modelling
- Outfall design & initial dilution calculations
- DTA risk assessment
- Assessment of land reclamation on tidal flows and pollutant dispersion
- Sediment plume modelling in support of dredging operations
- Deposition modelling in support of aquaculture consenting
- Flood Risk Assessment
The modelling process is able to incorporate numerous variables to provide accurate outputs. Capabilities of modelling include:
- Estimation of location and extent of sediment deposition from dredging operations
- Prediction of tidal flows and subsequent transport and dispersion of effluent plumes
- Prediction of temperature, salinity and dissolved oxygen
- Prediction of tidal average and maximum concentrations from a discharge
- Consideration of interactions between multiple outfalls
- Initial dilution estimation for outfall diffusers in accordance with regulatory requirements
- Model inclusion of substances of varying character including those that are dense, degradable, adsorbative, volatile or oily.
- Spill, continuous or intermittent discharge modelling
- Effects of meteorological & river influences
- Flood risk assessment modelling for rivers and floodplains; 1-dimensional and 2-dimensional approaches. Incorporating the influence of tributaries, bridges, weirs, culverts, sluices, storage areas, split channels, tides and other hydraulic features.
- Met station data collection