Community area risk assessment for flash flood

0507268 - ÚGN 2020 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Kolejka, Jaromír - Rapant, P. - Krejčí, Tomáš
Community area risk assessment for flash flood.
20TH INTERNATIONAL COLLOQUIUM ON REGIONAL SCIENCES. Vol. 20. Brno: MU Brno, 2017 - (Klímová, V.; Zitek, V.), s. 497-505. ISBN 978-80-210-8586-2.
[International Colloquium on Regional Sciences /20./. Kurdejov (CZ), 14.06.2017-16.06.2017]
Institucionální podpora: RVO:68145535
Klíčová slova: flash flood * local development * risk assessment * planning documentation
Obor OECD: Physical geography

The flash floods forecasting is struggling mainly with extraordinary irregularities in origin of causal precipitations. They only in conjunction with the territory water saturation caused by antecedent precipitations start effect of other local factors that can consequences of short-term extreme precipitation either worsen or mitigate vice versa. Other community area features represent a permanent potential for an adequate territory response after heavy rains. According to current knowledge, it is possible to assess the flash floods hazard of a particular territory in case of extreme precipitation in advance. If such precipitations are already on the ground, or if they are just coming up in the atmosphere, the local flood control headquarters has at least time enough to call alarm and issue a flood warning. In the ideal case, it is possible to incorporate such area assessment into the concept of decision-making of the disaster staff and to insert it into the master plan documentation. The aim of this text is to present above mentioned original method, which can be used in authomatic GIS environment by public administration as well as other users. Suggested procedure is based on automatic hydrologic modelling in ArcGIS platform in combination with advanced digital terrain model. Delimitation of partial catchment basins is also part of our proces, which enables to decide about the risk value of the area in more detail using weighted arithmetic mean. These methods result to detailed imagination about probably threatened localities - and it is essential tool for local authorities and their decision making process in case of early warning.
Trvalý link: http://hdl.handle.net/11104/0298289