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Comparision of the Catchment Areas of the Rivers of the Kłodzko Basin Calculated on the Basis of the Hydrographic Map of Poland and the Digital Elevation Model

Izydorski Jakub, Bodlak Maciej

Civil and Environmental Engineering Reports

2025

Vol. 35, no. 2

47--62

The catchment area is important information from a hydrological point of view. The article addresses the problem of differences between catchment areas measured on the basis of a Hydrographic Map of Poland, surface catchments created on the basis of a digital elevation model and catchments reported in the literature. It describes the hydrographic maps available, including the possibility of using them online. The possibilities of measuring the catchment area using modern software available on the SCALGO Live portal and the tools contained therein are presented, using the example of a section of the Nysa Kłodzka River and its tributaries. The plots made available by IMGW were used as baseline data. Attention was paid to what can cause differences in the results obtained and which method for a given case should prove to be the most practical.