Wybrane mo liwo ci analizy numerycznego modelu rze by terenu w interpretacji cech morfometrycznych na przyk adzie doliny B o ewki (Ukraina)

The study is focused on spatial analysis of qualitative data describing relief of the Bolo ivka river valley. Numerical model of land surface was taken as the main database of the valley relief. At first, it was subjected to preliminary visual analysis, and then to other analytical operations in order to identify and describe point, linear and spatial morphometric characteristics of the examined area. The spline interpolation method was used to obtain a simulated model of the bottom surface of alluvial deposits and to calculate their approximate thickness. Interpretation of the relief of the sub-Quaternary basement permits to distinguish three large depressions following the orientation NW-SE, which were probably used by fluvioglacial waters of the Sanian 2 (= Oka) ice sheet. Morphometric analysis of the morphological elements of the Bolo ivka river valley indicates that transverse linear structures (steps) occurring at its bottom reproduce the surface relief of the alluvia's substratum. Diversified physiographical parameters of the Bolo ivka river catchment permit to distinguish three domains: the western, central, and eastern. The paper reports the preliminary results of continued investigations, and will be followed by a more extensive study of the geomorphological development of the Bolo ivka river catchment.