The article presents a simulation of urbanization impact on runoff changes in an urbanized catchment. Application of a distributed hydrological WetSpa model enabled comprehensive use of Landsat satellite images as a source of data about contemporary and historical land cover in the catchment. The analyses conducted for the Biała river catchment, with over 60% of the area being urbanized, revealed a significant influence of changes in the size of urbanized area on runoff hydrograph.
The main objective of this study is to evaluate the changes in the hydrographic network of Słowiński National Park. The authors analysed the changes occurring in the drainage network due to limited maintenance in this legally protected natural area. To accomplish this task, elaborations prepared on the basis of aerial photographs were used: an orthophoto map from 1996, hyperspectral imaging from June 2015, and a digital terrain model based on airborne laser scanning (ALS) from June 2015. These spatial data resources enabled the digitisation of the water courses for which selected hydro-morphological features had been defined. As a result of analysing the differences of these features, a quality map was elaborated which was then subjected to interpretation, and the identified changes were quantified in detail.