Optimization of load norms for transfrontier water bodies taking into account natural processes of self-purification

In the paper is used the systems approach to justification and optimization ofnorms of the load on the transboundary water bodies. Special attention was given to evaluation of the factors determining the norms of load on the natural water systems for individualtransboundary water bodies. The effects of the pollutant transformation in the water bodiesare taken into account. The algorithm of attribution of quotas to various kinds of man-causedload along entire length of the water body in question is offered. The concrete methods ofmeeting the environmental norms for the priority-driven types of pollutants. It is offered tointroduce the norms attribution basing on environmental and emission approaches and takinginto account the use of the best technologies for industrial and natural systems.