Reduction of the discharge divergence

Árran is the Lule Sámi center in the village of Drag in Hamarøy Municipality in Nordland county, Norway. The center was established in 1994 to foster and promote the Lule Sámi language and culture. It does this by arranging on-site and video conference courses in Lule Sámi, publishing books, and doing research. The center has a museum, a souvenir shop, and a Lule Sámi day-care center on its premises. One of the major projects that it was involved with was the Lule Sámi on-line course Sámasta and soon it will be publishing a Norwegian–Lule Sámi dictionary.

The Parshall flume is an open channel flow-metering device that was developed to measure the flow of surface water and irrigation flow. The Parshall flume is a modified version of the Venturi flume. Named after its creator, Dr. Ralph L. Parshall of the U.S. Soil Conservation Service, the Parshall flume is a fixed hydraulic structure used in measuring volumetric flow rate in surface water, industrial discharges, municipal sewer lines, and influent/effluent flows in wastewater treatment plants. The Parshall flume accelerates the flow by contracting both the parallel sidewalls and a drop in the floor at the flume throat. Under free-flow conditions, the depth of water at a specified location upstream of the flume throat can be converted to a rate of flow. Some states specify the use of Parshall flumes, by law, for certain situations. Differences between the Venturi and Parshall flume include reduction of the inlet converging angle, lengthening the throat section, reduction of the discharge divergence angle, and introducing a drop through the throat.