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 and news
Conservation Principles for North Ireland
IHBC publishes response to consultation.
Budget 2022 - CIOB Ireland responds
Institute applauds funding initiatives but presses for additional retrofit and tax measures.
Electrotechnical sector prepares for All-IP networks
The switch from analogue to digital has begun.
The fourth industrial revolution is well underway.
IHBC COP26 virtual Conservation Helpdesk
Free online resource will offer guidance on conserving places and the planet during COP26.
Government allocates additional money for building new homes on derelict land.
Human centric goes beyond user friendly
Smart built environments can be designed around the requirements of real people.
Being practical about digital transformation
Consistency is at the core of realistic strategies.
CIOB's Art of Building photography competition
Entries being accepted until 20 November 2021.