Selective Withdrawal and Heated Water Discharge: Influence on the Water Quality of Lakes and Reservoirs. Part II - Induced Mixing with Submerged, Heated Water Discharge

摘要

Various methods have been proposed to improve the water quality of stratified lakes and reservoirs. This report presents a field and theoretical investigation of the induced, vertical mixing in a temperature stratified impoundment resulting from the submerged discharge of heated water. This work shows that a subsurface, heated water discharge can induce vertical mixing of a stratified impoundment. The feasibility of and considerations in using this method of mixing along with relations and procedures for applying the results of this study to a impoundment are presented. A numerical model of an impoundment's temperature structure and changes thereto, resulting from a submerged, vertical, heated water discharge and/or atmospheric energy exchange is presented. The model is in good agreement with observations of the natural temperature distribution (no heated water discharge) in two lakes; model predictions show the changes in the 'natural' temperature distribution for one lake induced by a submerged, heated water discharge.