Flow through culverts
This presentation is the property of its rightful owner.
Sponsored Links
1 / 7

Flow through Culverts PowerPoint PPT Presentation


  • 107 Views
  • Uploaded on
  • Presentation posted in: General

Flow through Culverts. Flow through Culverts. A short passage way for flow under a highway, railroad or other embankment is referred to as a culvert. Culvert shape may be circular, rectangular, arch or elliptical.

Download Presentation

Flow through Culverts

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Flow through culverts

Flow through Culverts


Flow through culverts1

Flow through Culverts

  • A short passage way for flow under a highway, railroad or other embankment is referred to as a culvert.

  • Culvert shape may be circular, rectangular, arch or elliptical.

  • Several flow conditions are possible and these conditions depend upon several parameters.

  • Flow control (upstream or downstream)

  • Depending upon the head and the tailwater levels, the control may shift from the inlet to the outlet and vice versa as these water levels change.


Flow capacity

Flow Capacity

  • A curve relating the headwater level to the rate of discharge through the culvert is referred to as the rating curve or the performance curve.

  • For flow capacity determination, pick rating curve that gives lower discharge among inlet and outlet rating curves


Inlet control

Inlet Control

  • A culvert does not flow full even if the entrance is submerged if the Head at inlet is less than , where is the height of the culvert at the entrance and = the upstream water level – the culvert invert level

(Chaudhry, 2008)


Rate of discharge henderson 1966

Rate of Discharge [Henderson, 1966]

  • Unsubmerged entrance

    = Culvert width, coefficient accounts for contraction on the sides. For square edge sides, ; and for slightly rounded sides .

  • Submerged entrance

    accounts for contraction at the sides and the top. For square edge entrance, ; and for rounded edges .


Outlet control

Outlet Control

  • In the outlet control, the culvert either flows full or partially full.

    is total losses

    is elevation of the water level

(Chaudhry, 2008)


Flow measurement

Flow Measurement

  • Employing the critical flow characteristics, only flow depth is sufficient to estimate rate of discharge.

  • Flumes: discharge measurement is based on the assumption that critical flow is produced by constricting the width, raising the bottom, or combination of the two. Then the measurement of a single flow depth is sufficient to determine the discharge.

  • Parshall flume is a commonly used flume (standing wave flumes)

(Chaudhry, 2008)


  • Login