Master of Science (MS)
Civil and Environmental Engineering
Number of Pages
The City of Las Vegas Water Pollution Control Facility treats about 45 million gallons of municipal wastewater per day. Since effluent flow measurement commenced in 1991, measured outflow of water from the facility has often exceeded measured inflow, a physical impossibility. The discharged flow to Las Vegas Wash is reported to the State of Nevada Colorado River Commission, which controls the allocation of the river water. For this reason, accurate measurements of flow volumes are essential to earn return flow credits from Lake Mead; After reviewing existing plant flow data, nine experiments were conducted at the plant to determine which flow measurement devices might be suspected of not measuring flow correctly. Evaluations were made of influent flow accuracy at each of the four existing Parshall flumes. Tests were performed at effluent propeller meters to determine their accuracy. Hydraulic improvements are suggested for reduction of both flow disturbances and measurement errors.
Accuracy; Flumes; Investigation; Meters; Parshall; Propeller
Civil engineering; Mechanical engineering
University of Nevada, Las Vegas
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Rivera, Monica Gisela, "Accuracy investigations of Parshall flumes and propeller meters" (1994). UNLV Retrospective Theses & Dissertations. 364.