Award Date

1-1-1994

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Civil and Environmental Engineering

Number of Pages

477

Abstract

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.

Keywords

Accuracy; Flumes; Investigation; Meters; Parshall; Propeller

Controlled Subject

Civil engineering; Mechanical engineering

File Format

pdf

File Size

13803.52 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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