Hydraulic grade line
A hydraulic grade line (HGL) is: ‘A theoretical line showing the sum of the pressure elevation heads of a flow relative to a datum. For uniform open-channel flow, the hydraulic grade line is the same as the water surface. The slope of the hydraulic grade line is the hydraulic gradient.’
Ref Culvert, screen and outfall manual, (CIRIA C786) published by CIRIA in 2019.
[edit] Related articles on Designing Buildings Wiki
- Catchment flood management plans.
- Culvert.
- Flood and water management act.
- Flood risk management plans
- Flood risk.
- Hydraulic jump.
- Hydraulic pressure.
- Hydraulics.
- Hydromorphology.
- Hydrostatic pressure.
- Pitt Review Lessons learned from the 2007 floods.
- River engineering.
- SUDS Manual.
- Sustainable Urban Drainage Systems.
- Water engineering.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Campaigning for Edinburgh: the Cockburn Association 1875-2049
The role of the civic voice in protecting character. Book review.
CIOB photography competition is open for entries.
ECA Edmundson apprentice of the year award
Finalists announced.
Major new study exposes serious knowledge gaps.
Generating energy from internal light as well as sunshine.
ECA welcomes plans to strengthen subcontractor quality control.
Combining mid-career qualifications with experience broadens career opportunities.
Why being a mentor can help your career.
Channel 4 broadcaster to host 125th anniversary ceremony.
Listed structures on the rail network
Heritage interests and operational requirements must be balanced.
Historic England publishes research into embodied carbon when retrofitting traditional buildings.
New Prime Minister delivers on ECA call for cut in electricity costs.