The hundred-year water flow is a natural phenomenon forming the landscape for thousand years, especially in valleys and plains. Living nature takes it into account as a natural selection of organisms and their associations, the environment of which it forms or destroys. The fact, that natural processes are strong and uncontrollable, requires auto reflection of the whole our culture. Industrial revolution in the 19th century meant principal transition of human society from sustainable to predatory one and this trend has not been reversed. Although huge financial sources are expended for flood control, engineers are not able to solve this problem. There are no perfect and permanent solutions. Therefore we must attempt for knowing natural processes causing floods and for finding rescue especially in ourselves, in small, everyday solutions.