Accession Number : ADA282202

Title :   Destratification Induced by Bubble Plumes.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s) : Zic, Kreshimir ; Stefan, Hienz G. ; Turner, Herman O. ; Wilhelms, Steven C.

Report Date : JUN 1994

Pagination or Media Count : 66

Abstract : Destratification is an alternative for improving the overall quality, particularly dissolved oxygen content, of a stratified reservoir. Pneumatic systems have been used most often for providing the energy needed to destratify a water body. However, there are no means to evaluate the long-term operation of a destratification system. Under contract, the St. Anthony Falls Hydraulic Laboratory, University of Minnesota, developed a subroutine entitled BUBBLES that simulates the destratification of a lake or reservoir by an air bubble diffuser. This subroutine was added to CE-THERM-RI and used to account for mixing that occurs in a lake or reservoir caused by a pneumatic destratification system. CE-THERM-Rl contains the thermal analysis portion of CE-QUAL-R1 and is used to simulate the water and heat budgets of a water body. This report describes the development of BUBBLES and its incorporation into CE-THERM-R1. In BUBBLES, the reservoir is divided into a near field and a far field. 'Me near-field model includes the bubble plume and the flow in its vicinity. The far-field model treats the rest of the reservoir and considers the flow from the plume toward the lake and from the lake toward the plume. The far-field model is coupled with CE-THERM-RL to simulate water and heat budgets of the water body. Bubble plume, Pneumatic, Destratification, Reservoir, Diffuser, Water quality, Lake.

Descriptors :   *LAKES, *RESERVOIRS, *HYDRAULIC MODELS, *STRATIFICATION, *WATER POLLUTION ABATEMENT, AIR, BUBBLES, BUDGETS, DIFFUSERS, FAR FIELD, HEAT, MIXING, NEAR FIELD, OXYGEN, PLUMES, SUBROUTINES, THERMAL ANALYSIS, WATER QUALITY, TEMPERATURE GRADIENTS, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, PNEUMATIC EQUIPMENT, ANAEROBIC PROCESSES, OXYGEN, WATER FLOW.

Subject Categories : Hydrology, Limnology and Potamology
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE