Using the infra-red telcdetection methods for measurement of waler temperature it has been shown that hydrodynamic conditions which are a result of anthropopressiou, as the supplementary water mass movement, impose square differential temperature conditions of limnic ecosystem. The Rybnik dam reservoir shows, that effect of anthropopression expressed as the thermal pollutant and itrareservoir water movement is stronger than the natural limnological factors for the type and location of the reservoir. For such situation, when the mixion of the water mass caused by anthropopression is stronger than natural water movement, the author proposes the term "anthropomixion".