Following the present southern border of the city of Vienna, the rivulet Liesing crosses several types of landscape, which as nowadays mostly built and highly fragmented area do not provide an indication of the historical relation between the spatial development and the watercourse itself. Apart from the inevitable need of water for early human settlements, the region of the Liesing also provided rich resources, which allowed an early economic relation to the growing city of Vienna, whose trade infrastructure crossed the Liesing at several points. In addition to the transport of food, craft and industrial products as well as building material, the increasing number of traffic links to the south also served as the connection for the citizens of Vienna to visit their preferred area for Sommerfrische (summer-resorts) at the western shores of the river, located at the edge of Wienerwald. The water hence had different and partial contradictory functions like the support with hydro energy for mills and later on industry, as well as the sewage of their and the domestic wastewater. On the other hand it served as an aesthetic natural object for temporary urban emigrants. But the river did on his part ask further solutions of his users and the city and municipality administrations due to his dynamic nature characterized by a periodic change of flooding and waterdeficiency. The therefor required functional and preventiveadaptations at the watercourse stand in continuous interaction with the spatial development at the border of the city, whose perception and notion changed immensely over the period of time observed in this thesis. In this ongoing discussion of the nowadays scrutinized dichotomy of rural and urban -or further natural and cultural - the area of the Liesing as well as the river itself as a socionatural site always had an interspatial and -perceptional position which will be the focus of this environmental historical reflection.