Annual average rainfall
The HS2 London-West Midlands Environmental Statement published by the Department for Transport in November 2013, defines ‘annual average rainfall’ as:
‘Average amount of precipitation falling at a specified site recorded by the Meteorological Office, which gives a measure of the overall wetness of the local climate.’
[edit] Related articles on Designing Buildings Wiki
- BREEAM Surface water run-off.
- Catchment flood management plans.
- Critical duration event.
- Coastal defences.
- Delivering water efficiency in commercial buildings: A guide for facilities managers.
- Drainage.
- Flood and water management act.
- Flood insurance.
- Flood risk.
- Future flood prevention.
- Groundwater.
- Groundwater control in urban areas.
- River engineering.
- SUDS.
- Sustainable water.
- Types of water.
- Water Act 2014.
- Watercourse.
- Water framework directive.
- Water table.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Recognition, influence and growth
SocEnv identifies three strategic pillars in new strategy to 2045.
Discover the future of roofing, cladding and insulation.
New guidance for professional practice, cultural change and regulation in social housing.
The heritage of nuclear and conventional power stations.
New measures to stop people being ripped off
Government to protect families from cowboy builders and aggressive bailiffs.
New Futurebuild showcase brings an innovation-first approach.
National Planning Policy Framework
Understanding the 2026 changes.
ECA's public affairs priorities
Member consultation opens to shape priorities for 2027 to 2030.
Dutyholder responsibilities from 1 July 2026.
Where performance meets practice
The Building Envelope Stage at UKCW Birmingham.
CIAT publishes briefing on planning reforms.
Leaders in Learning for Practice Network
Call for conservation leaders in learning to register interest in new network.

















