ACTUAL THEORETICAL AND PRACTICAL PROBLEMS OF SEDIMENT TRANSPORTATION.

Considering the sediment transportation as a physical phenomenon, according to the principle of conservation, author establishes the balance equations of the mass, kinetic energy, internal energy and momentum. Their comparison and evaluation led to several basic perceptions. Starting from theoretical principles, the sediment-transportation capacity of water courses are investigated. Measurements carried out on the river Drave parallel with observations, the energy requirement needed to the sediment transportation and to the re-arrangement of the river bed is determined.