Hydraulic Grade Line definition

Hydraulic Grade Line means the line representing the pressure head available at any given point within the drainage system.
Hydraulic Grade Line means a line joining points whose vertical distances from the centroid of the cross section of the stream flowing in a closed channel are proportional to the pressures in the pipe at the point, or in an open-channel, the flow lies in the surface of the stream.

Examples of Hydraulic Grade Line in a sentence

  • Storm drains under the Highway shall be designed with the Hydraulic Grade Line (HGL) at or below the crown of pipe for the 10-year frequency peak discharge.

  • The Hydraulic Grade Line (HGL) shall reflect the effects of backwater in the profile.

  • For small size development projects, a reservoir can be assumed with the appropriate Hydraulic Grade Line (HGL) for water supply to the area being designed for.

  • Discharge through Venturi Meter; Discharge through Orifice Meter; Discharge through flow nozzle; Measurement of velocity by Pitot tube,pitot-static tube.CLOSED CONDUIT FLOW: Energy losses in pipelines; Darcy – Weisbach equation; Minor losses in pipelines; Hydraulic Grade Line and Total Energy Line; Concept of equivalent length; Hydraulic power transmission through a pipe; Siphon; Pipes in series, parallel & branched pipes.

  • For pressure flow, the plans shall also show the Hydraulic Grade Line (HGL) in the profile or on a separate plan submittal if the HGL conflicts with other items in the profile view.

  • A drainage report shall be submitted with the construction plans to verify pipe sizing, Hydraulic Grade Line (HGL), pipe cover, velocities, stabilization and water spread on the roadway.

  • A detailed drainage design supported by a catchment area plan and drainage calculations (including a Hydraulic Grade Line Analysis) must be submitted with the Construction Certificate application.

  • Hydraulic Grade Line (HGL) - A line representing the pressure head available at any given point within the drainage system.

  • Figure 5.7.2.6-a Drainage Easement Requirements 5.7.2.7 Drainage Design Report A drainage report shall be submitted with the construction plans to verify pipe sizing, Hydraulic Grade Line (HGL), pipe cover and angles, velocities, channel lining and water spread on the roadway.

  • The 25-Year Storm shall be used as a Check Storm: • Design Criteria for 10-Year Design Storm: Hydraulic Grade Line (HGL) shall not exceed thecrown of the pipe.• Design Criteria for 25-Year Check Storm: HGL in any public inlet, catch basin or manhole must be a minimum of 1 foot below the rim elevation of the structure.• Method: The Rational Method or Soil Conservation Service (SCS) Method may be used to calculate peak flow rates.

Related to Hydraulic Grade Line

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