For this analysis the 1 D hydrodynamic model DYRESM was used to simulate 10 idealised dams ranging in geographic (and climatic) location and morphometry DYRESM was used to simulate the water balance and thermal structure of the dams, and in particular estimate the evaporative fluxes. The evaporative flux measurements were corrected for non-neutral atmospheric conditions, still-air conditions and for the effect of wind-sheltering.