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REAERATION AT NAVIGATION LOCKS
| 题名： | REAERATION AT NAVIGATION LOCKS |
| 作者： | Steven C. Wilhelms |
| 关键词： | Dissolved nitrogen Dissolved oxygen Navigation locks Reaeration |
| 摘要： | 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. Simulataneously, nitrogen supersaturation occurred but at levels that did not appear to be detrimental to aquatic biota. |
| 报告类型： | 科技报告 |
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