January 24, 2024
With the requirement of SuDS on almost every project, developers often approach the flood risk and drainage design with a question:
How big does the attenuation tank need to be?
Often, Developers will try to keep costs down by using a high-level estimate for site attenuation for planning submissions without doing a Detailed Drainage Design.
Once on site however and the actual site constraints are evident (e.g. high voltage cables, steep topography), it is often assumed this previously estimated attenuation volume can be split between different locations and SuDS features (for example in the form of blueroof, permeable paving, geo-cellular storage tanks etc) without compromise.
This may work for minor planning applications and smaller projects, however due to some of the factors described below, this approach is not failsafe and can often lead to problems at the detailed design stage.
Preparing a Detailed Drainage Design from the onset will take into account these and other factors, using accurate hydraulic modelling to design a drainage strategy that works based on the independent constraints of the site. This will save a developer time and money in the long run, by getting the drainage strategy right first time.
News & Views
February 16, 2024
Flooding is a reality in the UK within many areas. A Flood Risk Assessment (FRA) is therefore vital when undertaking any construction project (as well as often being a mandatory planning report).
February 8, 2024
SIA is a simple risk-based method for selecting the appropriate type and combination of SuDS
January 24, 2024
Using a high-level estimate for site attenuation for planning submissions without doing a Detailed Drainage Design could cost a developer time and money in the long run.