technical work - flood risk & drainage

Surface Water Drainage

Surface water will be managed using Sustainable Drainage Systems (SuDS);
Surface water will be transported via swales to a network of drainage basins;
Basins combine / support a range of functions including biodiversity, recreation and improved aesthetics;
Some basins will be designed to be permanently wet for biodiversity benefit, whilst others will be dry and usable for informal recreation for the large majority of the year; and
Water is attenuated to reduce outflow and mimic greenfield (pre-development) conditions before being released into existing watercourses.

FOUL WATER DRAINAGE

A preliminary strategy has been agreed through consultation with Wessex Water;
Foul water is to be managed at the existing treatment works in Lower Innox on the northern side of the town;
It is expected that foul water will be pumped to an existing sewer in Handlemaker Road, which eventually leads to the treatment works; and
Upgrades to existing infrastructure across the town will be provided by Wessex Water, which will be funded by connection charges paid by the developer.

SURFACE WATER FLOODING

Parts of the site are susceptible to surface water flooding, which results in flowpath routes towards the River Frome;
These flows will be consolidated into 'combes' or cascading wetlands forming attractive biodiverse habitats;
A number of existing culverts will be removed / daylighted to restore more natural riparian conditions; and
Built development is to be located outside of the surface water floodplain.

RIVER FLOODING

The River Frome is an attractive asset which is subject to periodic flooding;
Flooding helps support a wide range of habitats increasing biodiversity on the site, but which must be managed to avoid impact on residents; and
Built development should be located outside of the flood plain.

See our Flood Risk & Drainage Plan Below