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The main goal of this work was to verify the historic data of historic artificial water reservoir Ottergrund, Banská Štiavnica district, which is inscribed in the UNESCO world heritage list. Main focus was set to area-storage capacity curve. There is historic map with the display of reservoir bottom contours and area-storage capacity curve in a paper format. These data were analysed and compared with the results of the calculation of area-storage capacity curve that was performed with the use of a new tool with named “ASC_Curve”, which is based on Python script. This tool utilizes ArcPy site package and it works with the TIN model of water reservoir bottom. In case of water reservoir Ottergrund we created the TIN model of the historic bottom; input data for the TIN model creation was the historic contour plan. The results of the analysis have shown that the storage capacity calculated with the use of the developed ASC_Curve tool is 97% of the volume mentioned in the historic map. Analysis has also show the minor mathematical errors in the calculations of the area-storage capacity data in historic contour plan. This tool can also be used also for the analysis of the current storage capacity conditions of the water reservoirs, if the surveying with echosounding equipment is performed to obtain the data to produce the TIN model of the water reservoir bottom.

AREA-STORAGE CAPACITY CURVE OF HISTORIC ARTIFICIAL WATER RESERVOIR OTTERGRUND, SLOVAKIA – ASSESSMENT OF THE HISTORICAL DATA WITH THE USE OF GIS TOOLS