Environmental and Water Quality Operational Studies. Reaeration at Navigation Locks.
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 up-take 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 bulk-head 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1985
- Accession Number
- ADA153813
Entities
People
- S. C. Wilhelms