Określanie obszarów lokalnych podtopień na podstawie NMT i bazy HYDRO

TL;DRAbstract

HYDRO databases are an important component of the Polish hydrographic maps made for several years. Special thematic data stored in spatial databases cover an area of nearly 60% of the country. This paper aims to show new possibilities of using existing HYDRO databases integrated with Digital Terrain Models. DTM is shown as the background for selected hydrographic data layers. For this purpose, the authors use an elevation data model developed with Airborne Laser Scanning data. These kinds of DTMs were developed for large part of the country, and the average error for most areas is less than 1 m. These results are kind of a three-dimensional view, which allows better understanding of hydrographic phenomena. Using the GIS tools allowed to find runoff directions and to determine the places of water gathering. This will allow to designate areas of local flooding caused by heavy rain and also as a result of snow melt. This information could be a root for creation of relevant maps and pl

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