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 and news
Industry leader Steve Murray takes on role.
An abundant and versatile building material.
How overheating complicates ending gas in the UK.
600,000 heat pump installations targetted per year by 2028.
Cost planning, control and related articles on DB.
Helping prevent those unwanted outcomes.
ICE debate Public transport - post pandemic.
How has transport changed due to Covid-19 ?
Cross-ventilation in buildings. Do you have it ?
Will you need it ? after June 15 and the new Part O ?
Share your knowledge with the industry.
Create an account and write the first of many articles.
The green jobs delivery group.
CIAT commentary after the first meeting.
Liverpool's world heritage site status
Who is to blame?
Research recommends focussing on portfolio success rather than project success.
ICE and BSI launch revised PAS 128 standard.
The revised standard for mapping underground utilities.
Launching the UK net zero carbon buildings standard.
Cross-industry steering group seeks support in delivery.
How to write an inspection and test plan.
Help us update process pieces from your field.
APM report explores existing practice.
Previous reflections on mental health with CIAT.
COVID-19 and the importance of mental wellbeing.
IHBC accreditation recognised by CSCS
As Professionally Qualified Person (PQP).
The Queens speech; bill by bill for 2022.
In order of relevance and with industry responses.
Mental Health awareness week, May 9-15.
Raising awareness of the impacts of loneliness.
Rapidly renewable materials and construction.
The list is growing, and in more ways than one.
Personal experiences of infrastructure maintenance issues.
We shouldn’t build new, If we can’t maintain what's built.
Mass timber: challenges and potential solutions.
Timber Accelerator Hub phase 1 report