The Effects of Diurnal Mixing on Thermal Stratification of Static Impoundments,

摘要

The time variation in the temperature distribution of a static water impoundment is predicted. The body of water is modeled as a discrete number of horizontally isothermal layers and the energy equation is solved using an implicit numerical scheme. Vertical energy transport mechanisms included are solar absorption,molecular diffusion,and convective mixing due to nocturnal turnover. The latter mechanism,called diurnal mixing,is found to have a profound effect on the stratification,particularly in the epilimnion patterns for a typical deep static impoundment.