Valid prediction; economical problem; cost reduction; mathematical modelling; economical damage.

The floods is ecological and important a new economical problem today. Valid prediction of flood, very cost reduction of the elimination properte and economic damage. This paper is going to deal with problem of mathematical modelling of extréme water supply situations ? flood, with the problem of creation of dynamic models of precipitation ? out flow relations in flood situations that work in real time and enable prognoses. Its a way how extend the period of the prognose and cost reduction of the elimination economic damage. The prognosis is possible in a variable way according to various predicted rainfalls in time, otherwwise the given hydrograf is outlined tto the causative rainfall, where the last datum is taken as the end of the fals.

The floods is ecological and important a new economical problem today. Valid prediction of flood, very cost reduction of the elimination properte and economic damage. This paper is going to deal with problem of mathematical modelling of extréme water supply situations ? flood, with the problem of creation of dynamic models of precipitation ? out flow relations in flood situations that work in real time and enable prognoses. Its a way how extend the period of the prognose and cost reduction of the elimination economic damage. The prognosis is possible in a variable way according to various predicted rainfalls in time, otherwwise the given hydrograf is outlined tto the causative rainfall, where the last datum is taken as the end of the fals.