Blockage
Culvert, screen and outfall manual, (CIRIA C786) published by CIRIA in 2019, refers to:
- A variable blockage as: ‘A variable accumulation of debris or sediment that reduces flow area and potentially leads to flooding, scour or other impacts. When on a screen sometimes referred to as blinding’. Where a screen is: ‘An arrangement of bars, grids or poles placed in a watercourse.’
- A permanent blockage as: ‘A permanent fixture such as a service crossing or support that reduces the flow area of a channel, culvert, screen or other structure (eg screen bars).’
[edit] Related articles on Designing Buildings Wiki
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
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.
The importance of early engagement
Construction lessons from the Trillium HealthWorks Experience Centre.
Mayors are to be given planning call in powers
Mayors across England will be able to make the most important planning decisions.
The Master Builder: William Butterfield and his times. Book review.