An Overview of Reservoir Water Quality Concerns and Techniques of Investigation,
CORPS OF ENGINEERS TULSA OK TULSA DISTRICT
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Water quality control in reservoirs is a diverse subject lending itself to a temporally-based discussion. This paper will examine typical water quality concerns associated with various phases of the reservoir construction and operation process. It will begin with pre-impoundment studies, progress through problems with water quality in new impoundments, and culminate in an examination of problems with reservoir release schedules and low-flow regulation. Throughout the discussion various examples of problems encountered by the Tulsa District will be used to illustrate major points. This study illustrates the environmental planning process must continue through the construction phase and even into the early operation of some projects. Following the course of action dictated 20 years previously would have resulted in unnecessary annual costs of 972,000 for 18 years, a total of 16,524,000. It is probable other projects planned andor implemented during the 1960s and early 1970s might be profitably re-evaluated based on later improvements in environmental quality. The District is presently using the QUAL-II model to investigate the need for water quality flows at the other 12 projects with water quality as a purpose.