NWISRL PublicationsOrifice Plates for Furrow Flow Measurement: Part I - CalibrationThomas J.TroutauthorORIFICES, due to their discharge sensitivity to head, are potentially the most accurate open channel flow measurement device and consequently, the best device for determining furrow infiltration rates by the inflow-outflow method. Laboratory calibration determined that orifices under submerged flow conditions are insensitive to boundaries as close as one-half diameter from an edge, allowing practical field use of multi-holed orifice plates in furrows. Submerged flow discharge coefficient for square-edged orifices with the plate thickness less than one-third of the diameter is 0.625. Free flow coefficients vary both with orifice size and head.Research methodologyMass Import - autoclassified (may be erroneous)1986Article

For work being deposited by its own author: In self-archiving this collection of files and associated bibliographic metadata, I grant NWISRL Publications the right to store them and to make them permanently available publicly for free on-line. I declare that this material is my own intellectual property and I understand that NWISRL Publications does not assume any responsibility if there is any breach of copyright in distributing these files or metadata. (All authors are urged to prominently assert their copyright on the title page of their work.)

For work being deposited by someone other than its author: I hereby declare that the collection of files and associated bibliographic metadata that I am archiving at NWISRL Publications) is in the public domain. If this is not the case, I accept full responsibility for any breach of copyright that distributing these files or metadata may entail.

Clicking on the deposit button indicates your agreement to these terms.