Abstract: Parshall flumes were developed in the early 1900s as a simple and inexpensive way to provide accurate flow measurement in open channels. Unfortunately, many Parshall flumes in use today do not follow essential design ...

Abstract: Many flow-meter applications require accurate flow measurement (0.5% of actual flow or better), whereas other applications accept less-accurate flow measurements. Some applications attempt to minimize head loss, whereas a ...

Abstract: This study examines the dangerous countercurrent that can form at the downstream face of a low-head dam for certain flow conditions, utilizing computational fluid dynamics software and laboratory observations. The objective ...

Abstract: The Reynolds-averaged Navier-Stokes (RANS) equations were solved to model flow through two aged pipes at Reynolds numbers ranging from 6,700 to 31,000. Turbulence models employed include the

Abstract: The writers examine possible remediation options to mitigate the dangers found at low-head dams, using computational fluid dynamics and physical model tests. The objective was to identify an option that could be relatively ...

Abstract: Parshall flume tests were conducted to determine the sensitivity on indicated flow rate resulting from improperly located staff gauges and differing entrance conditions to the flume. An acrylic 2 ft (61 cm) Parshall flume ...

Abstract: A study conducted by the Utah Water Research Laboratory assessed the accuracies of a wide variety of flow measurement devices currently in service. During the study, a wide variety of flow measurement devices, including ...

Abstract: A Montana flume is a Parshall flume without a diverging downstream section and is used to measure open channel flow. Under free-flow conditions, the Parshall flume and the Montana flume have the same calibration characteristics, ...

Abstract: In the arid Western United States, water is among the most valuable resources. Typically, to successfully and accurately measure a flow rate using most types of flow meters, it is recommended that a straight section of ...