TY  - JOUR
AV  - public
ID  - nwisrl452
TI  - Orifice Plates for Furrow Flow Measurement: Part I - Calibration
SP  - 103
UR  - https://eprints.nwisrl.ars.usda.gov/id/eprint/452/
N2  - ORIFICES, 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.
VL  - 29
A1  - Trout, Thomas J.
EP  - 106
JF  - Transaction of the ASAE
IS  - 1
Y1  - 1986///
ER  -