An Engineering Solution to Improve Water Quality in a Tidal Lagoon

Date of Award

Fall 1975

Document Type


Degree Name

Master of Science (MS)


Civil & Environmental Engineering


Environmental Engineering

Committee Director

Chin Y. Kuo

Committee Member

Robert Y. K. Cheng

Committee Member

Ronald E. Johnson

Call Number for Print

Special Collections LD4331.E53P74


Rising demand for better water quality stimulated research and development of ways to improve the quality level in existing as well as proposed water systems. At present, most of the solutions focus on biological and chemical processes.

Many natural or man-made water bodies act as receivers for both point and non-point pollution sources. Employment of biological and chemical treatment has proved successful in many of these cases; however, in some cases a more natural physical solution of an engineering mode would be more desirable. A "flushing" technique using the tidal fluctuation as a driving force has been investigated and the water quality level monitored as a function of several dimensionless variables. Two types of outlets for flushing were considered - first, an open-channel system and second, a culvert system. With the aid of modeling techniques, detailed information has been generated to be applied in water quality analysis and engineering design.


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