Water head
Culvert, screen and outfall manual, (CIRIA C786) published by CIRIA in 2019, defines ‘head’ as: ‘The total energy per unit weight of fluid expressed in metres of water above a datum.’
Head loss is: ‘The difference in head between two points due to friction or other features that result in energy loss (eg a transition, step, construction, expansion or bend).’
Headroom is the: ‘Vertical gap between the water surface and the roof (soffit) of a culvert or outfall to allow for floating debris (also known as air draught).’
Headwater depth is: ‘The depth of water above culvert invert at the culvert inlet.’
Headwater elevation is: ‘The depth of water above datum at the culvert inlet.’
Headwater ratio is: ‘Specific energy of headwater divided by barrel height.’
[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.
Your views needed - a strategy for the professions, trades and occupations.
Confronting competency, codes, capacity and costs.
The hidden risk in modern construction supply chains.
Construction Management, 10 June
24 months to 14: CITB launches accelerated apprenticeships.
Bridging the gap between clients and contractors
Concerns remain around contractor quality, capability, and delivery.
Construction Management, 10 June.
Heat pumps beat boilers in new home tests.
Building Safety Act implementation in Wales
CIAT to host industry panel on 26 June.
New and updated CLC building safety guidance.
New UK National Buildings Database.
Building Safety Wiki Interviews
Chief executive of the British Woodworking Federation.
Planning condition discharge in England and Wales
A brief explanation from a building compliance expert, with further links.