Project Details

Client: Mega Brain Investments Limited & Oxford Architects

Categories: Hydraulic Modelling, Hydrological Analysis, Hydrology, SuDs

When: 2019

Location: Somerset, UK

Edenvale Young were appointed to prepare a sustainable drainage strategy to support the planning application for the proposed Somerset Cultural Centre near Bridgwater.  The development comprised the construction of 4 classrooms, a multi-purpose hall with catering facilities, 28 residential dormitories and ancillary accommodation as well as a central plant room. On the site there will also be an area for car and coach parking, structured hard landscaping and soft landscaping including planting of vegetation.

The site investigation (trial pits and soakaway tests) established that, infiltration rates were very low and commensurate with a firm to very firm clay. Whilst it may have been possible to identify a stratum underlying the site with higher infiltration rates it was considered that the weathered nature of the Mercia Mudstone reported militated against finding a region of higher infiltration. The drainage strategy incorporated a range of SuDs features including attenuation and detention ponds as weel as the use of green roofs to buildings, and bio-retention features within car parking areas.

Oxford Architects

Robert O'Reilly

Excellent on all aspects.

Oxford Architects

Strategic Drainage Strategy

The strategy was developed in accordance with the West of England Sustainable Drainage Developer Guide using Edenvale Young’s standard SuDS Proforma which  includes the following:

  • Site Configuration
  • Flood Mapping and Planning
  • Strategic Flood Risk Assessment
  • National Planning Policy
  • Site Permeable and Impermeable Areas
  • Greenfield Run-off Rates
  • Rainfall estimates derived from DDF Modelling
  • Run-off rates and volumes (Proposed Development)
  • SuDS hierarchy (Infiltration Attenuation)
  • Maintenance

 

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