Delivering Sustainable Water

Sustainable Drainage

As more river valleys become developed with hard surfaces (paths, roads and roofed areas) the volume of rainwater that runs off the land increases.

This can have a severe effect in a watercourse where flash floods can occur downstream where the volume of water entering the system can be extremely high due to a cumulative effect of development upstream.

To address this problem, the drainage systems of towns, cities and developments have been surveyed and a policy of Sustainable Drainage Systems (SUDS) has been developed to counteract the problems being encountered.

The philosophy of sustainable drainage systems or SUDS is to mimic as closely as possible the natural drainage from a site before development, and to treat run-off to remove pollutants. A sustainable drainage system provides several benefits over conventional systems. Correctly designed, installed and maintained, SUDS can improve the management of surface water run-off for most developments.

  • Reducing peak flows to watercourse and sewers, reducing flood risk downstream.
  • Improving water quality by reducing the levels of silts and pollutants.
  • Reducing potable water demand through rainwater harvesting.
  • Replicating natural drainage patterns, including the recharge of groundwater.

SUDS addresses issues of the quantity and quality of the water run-off from sites.

Rainwater Harvesting can form a key integral part of a well designed sustainable drainage scheme, it is often regarded as the first SUDS solution to be investigated.

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Case Studies

Severnside Housing, Shropshire

When Severnside Housing needed to provide quality, affordable homes it embarked on a building project that would not only meet their local communities’ needs but also provide sustainable housing for the area.

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Downloads

Rainwater harvesting
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BS8515 Guide
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SUR1 Guide
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Rainwater Harvesting advice for plumbers and installers
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