GIS Based of the Flash Flood Risk Estimation in Urban Areas. Kaunas City Case Study

摘要

The climate change is continually creating new challenges for researchers from various fields because it affects rainfall pattern and consequently the runoff and river flow over the world. The unpredictable flash floods of the last summer make it necessary to adapt the methods used in urban hydrology. On the other hand, intensifying urban development takes place without respecting the principles of sustainable development, which inevitably leads to unexpected problems, which cannot be solved without research. Flash floods causing inundation of relatively small urban areas localizing the damage to both the population's assets and the city’s infrastructure. To reduce the damage, it is first necessary to identify it, assess the extent of its and distribution in the city's territory and reveal the causes. The new achievements of remote sensing technologies in the last decade enables the rapid and timely acquisition of spatial information that can be used to identify potentially inundated areas and estimate their geometric parameters. The aim of this article is to determine potentially inundated areas by screening of local depressions using conventional GIS technologies and LIDAR data and develop a digital map for decision makers to maintain the sounder urban planning process.