ABSTRACT
After the construction of Freudenau Danube hydro power plant, in order to maintain the ground water regime in the 2nd and 20th districts of Vienna (30 km2 area) unaltered a ground water management system has been developed. Sealing walls along the river bank have been constructed and the ground water flow is regulated with the help of withdrawing and recharging wells placed on either side of the walls. The direct infiltration of contaminants from the Danube is prevented through continuous control of the water quality and regular monitoring in an elaborate net of ground water wells. The major changes in the ground water management area were associated with problems related to clogging processes in the river bed as well as with a general improvement of water quality. This paper presents an evaluation of the management system after three years of operation of the well systems.
