The influence of the hydro-technical system on the water flow of the Sebeș River

Abstract

Along the Sebeș River was built one of the representative hydrotechnical cascade systems in Romania. The significant potential of the river is used primarily to produce electricity at four hydroelectric power stations located downstream of four reservoirs. This system influences the natural runoff, which is controlled at the Petrești hydrometric station. Based on the reconstruction of the natural flows, two series of parallel monthly flows were obtained: one with flow of water drained into the bed (influenced discharge, what is measured) and another with reconstructed values (obtained from calculations). Based on them, the degree of influence of the natural flow was highlighted. The analyses were performed considering the multi-year average monthly flows, the annual average flows, as well as the extreme monthly average flows. Thus, pertinent conclusions can be drawn regarding the influence of the natural flow on the Sebeș River.

Keywords

• natural flow regime
• influenced flow regime
• discharge reconstruction
• water use
• reservoir
• hydroelectric plant
• type of influenced flow