Session K.pdf - Clarkson University

It is significant that the radiation thermal transferring, the evaporation transferring andconventional transferring are all taken into account when Φ SS (Φ SI ) is calculated accordingto (Recommendation, 1986).The surface water temperature T SW (without ice cover) as a first approximation is determinedin the assumption of the linear character of the heat flux changing along thedepthh hTSW= T + ΦSW−ΦBW. (6)3λWZ6λWZHere λ WZ – the thermal diffusivity coefficient in the vertical direction; Φ SW – the heatfluxdensity on the boundary of air-water; Φ BW – the heat-flux density on the bottom ofthe reservoir. Since the relation (6) is only used with the proviso that ice formationstarts on the water surface (T SW