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Department of Civil Engineering, University North, Koprivnica, Croatia
Department of Geodesy and Geomatics, University North, Koprivnica, Croatia
Department of Geodesy and Geomatics, University North, Koprivnica, Croatia
Department of Geodesy and Geomatics, University North, Koprivnica, Croatia
Department of Civil Engineering, University North, Koprivnica, Croatia
This paper presents the application of geodetic and hydrological measurements to define the water balance in the example of a lake in an alluvial medium. The purpose of the above is to provide insight into parts of the lake's water balance since evaporation from the water surface (evaporation) and precipitation, along with infiltration and surface inputs and outputs from the lake, represent input data for the water balance calculation. An example of a modern approach to geodetic and hydrometric measurements on a lake created by damming the Plitvice watercourse for water inflow to the former mill for grinding grain, called "Dedin mlin", is presented.The emphasis of the work is on the field part, which includes measuring the flow and speed of the Plitvice River on the profile at the exit from the lake, as well as determining the lake's surface using an unmanned aerial vehicle. Using a mini-submarine, insight was obtained into the lake's shape, i.e., the conditions at the bottom and along the edges of the bed. Quality analysis of the water balance is essential for calculating the volume of new reservoirs that will be designed and built and for analyzing the water balance of existing reservoirs and natural lakes.
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