Author(s): I. Wojciech Majewsk; Maria Baginska; Janusz Kazmierski
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Abstract: Zarnowlec Lake is of glacial origin and is situated in the catch-ment of a small river(248 km²).The lake has steady water belancecreated by surface inflows and outflow,ground water inflow,pre-cipitation,and evaporation.Extreme water elevations in naturaiconditions ranged from 0.92 to 1.78m.Maximum water depth is19.4 m and total water exchange in the lake due to inflows takesnearly 2 years.The lake is used as the lower reservoir of pump-storage power plant and in near future will be utilized as coolingreservoir of the nuclear power plant.Upper reservoir_was constru-cted on nearby hills in the artificial way.The aim of this studywas the determination of hydraulic and thermal changes of the lakeunder the operation of both power plants,as well as assessment ofthe way of management of the lake in new water balance conditions.The influence of pump-storage plant was determined by means ofdirect measurements in prototype,The influence of nuclear powerplant was studied on laboratory hydrothermal model.The way ofmanagement of the lake under the operation of both power plantswas determined by means of calculations using mathematical model.
Year: 1987