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Huang, P.-S., DiLorenzo J.L., and Najarian, T.O.,
July 1994 - Mixed-Layer Hydrothermal Reservoir Model Journal of Hydraulic Engineering, Vol. 120, No. 7, July 1994, pp. 846-862Abstract:
This paper describes a new epilimnetic mixing formulation for two-dimensional reservoir models. This formulation incorporates a wind-mixing algorithm based on a mixed-layer theory developed previously for the upper ocean. Given an input of relevant meteorological parameters, the algorithm computes a heat-flux source term and a mixed-layer thickness using a mechanical energy balance approach. The computed heat-flux profile is used as a source term to the two-dimensional (longitudinal-vertical) transport equation for temperature. This transport equation is coupled with a corresponding laterally averaged hydrodynamic model developed previously. The combined formulation is solved using a semi-implicit, central-differencing scheme. Overall, this modeling approach requires minimal parameterization of wind-mixing processes. The combined model was adapted to an elongated (10.6-km-long, 0.8-km-wide) reservoir system, the Wanaque Reservoir, in New Jersey. To this end, complete sets of Wanaque Reservoir data were collected semi-monthly during a calibration period (August 1983 through November 1983) and a year-long verification period (November 1985 through November 1986). The model adaptation successfully reproduced salient features of the vertical structure, including a warm, well-mixed epilimnion, a relatively thin and abrupt metalimnion, and a cold, nearly isothermal hypolimnion.
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