sur1 surface water run-off appraisals

Sustainable Homes

Sur 1 - Management of Surface Water Run-off from Developments

 

Aim:
To design housing developments which avoid, reduce and delay the discharge of rainfall to public sewers and watercourses. This will protect watercourses and reduce the risk of localised flooding, pollution and other environmental damage.

Credits: Mandatory Elements + Max. 2 additional credits
Assessment Criteria:
Mandatory Elements must be achieved i.e. showing that the peak rate of run-off does not increase following development. Up to 2 credits are available for using SUDS to improve water quality of the rainwater discharged or for protecting the quality of the receiving waters.

Our Surface Water Management Services:
Whether you simply need to meet the mandatory elements or wish to attain additional credits, we offer a range of services to meet your requirements:

Surface Water Run-off Appraisal (Mandatory)

  • Peak Rate of Run-off - Assessment before and after proposed development.

  • Volume of Run-off - Calculations of rainwater volume to be discharged to a soakaway or watercourse.

  • Percolation Test Analysis

  • Recommendations on how to achieve the mandatory elements (Soakaway or Attenuation).

       (More Info)

SUDS Design (Possible Additional 2 Credits)

  • Complete design service producing all design specifications, calculations and drawings to fulfil the CSH credit requirements for soakaway or attenuation.

  • Advice on the most appropriate attenuation methods and technologies for your development e.g. permeable paving, rainwater recycling, swales, wetlands and reed beds.

  • Liaison with the Local Authorities, Environment Agency and sewerage operator to agree the best solution and its adoption.

Flood Risk Assessment (FRA)(Mandatory)

  • This is a mandatory requirement of SUR1 and often the planning process. We have vast experience in producing such FRA documents for all flood zones at competitive rates. (See SUR2 - Flood Risk)

  • Level 1 Flood Risk Assessment (Screening Study) included in Surface Water Run-off Appraisal

View Printable SUR1 PDF