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Title: Reaeration at navigation locks
Authors: Hydraulics Laboratory (U.S.)
United States. Army. Corps of Engineers. Mobile District.
Environmental and Water Quality Operational Studies (U.S.)
Wilhelms, Steven C.
Keywords: Dissolved nitrogen
Dissolved oxygen
Navigation locks
Hydraulic structures
Water quality
Publisher: Environmental Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Technical Report
Abstract: Gas transfer at several Corps of Engineers navigation locks was evaluated relative to effects on downstream dissolved oxygen and dissolved nitrogen concentrations. In-lock measurements indicated that very little oxygen uptake occurred during lock filling. Measurements of dissolved oxygen in the release water indicated that, in general, lock releases improve or maintain existing downstream water quality. At some locks where the downstream bulkhead slots were open to the atmosphere, significant air entrainment occurred downstream of the emptying valve during releases. The air and water mixture and hydraulic conditions in the downstream release conduits caused significant oxygen uptake and even oxygen supersaturation. Simultaneously, nitrogen supersaturation occurred but at levels that did not appear to be detrimental to aquatic biota.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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