Investigation of flash flood natural causes of Xirolaki Torrent, Northern Greece based on GIS modeling and geomorphological analysis

Konstantinos Tsanakas (), Kalliopi Gaki-Papanastassiou (), Kleomenis Kalogeropoulos (), Christos Chalkias (), Petros Katsafados () and Efthimios Karymbalis ()
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Konstantinos Tsanakas: National Kapodistrian University of Athens
Kalliopi Gaki-Papanastassiou: National Kapodistrian University of Athens
Kleomenis Kalogeropoulos: Harokopio University
Christos Chalkias: Harokopio University
Petros Katsafados: Harokopio University
Efthimios Karymbalis: Harokopio University

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2016, vol. 84, issue 2, No 15, 1015-1033

Abstract: Abstract This paper presents an attempt to evaluate the flood discharge for a severe flood event, which took place on October 25th, 2009. Based on spatial and meteorological data, a simulation of the flood event was established, through hydrological modeling, in a GIS environment. Furthermore, the geomorphological characteristics of the drainage basin and the drainage network were analysed. The results of the modeling such as the peak discharge, hydrograph, and volume, derived from the analysis of measured hydrographs in a number of non-flood causing rainfall events with operating stage gauge, were used for calibration and verification of the simulated stage-discharge hydrographs. Drainage basin characteristics such as steepness of the relief combined with a relatively short main channel of the drainage network as well as abnormalities in the hierarchical drainage by stream order are the main natural flood causes amplified of course by the intense human interference at the lower part of the drainage network with a series of constructions such as roads inside the main channel. Geomorphological analysis combined with GIS techniques are fundamental components of flood risk management as they provide the basis for a broad understanding of the relationship between river processes and flood causes in a fast and effective way in the context of policy makers.

Keywords: Flood; Modeling; GIS; Torrential catchment; Unit hydrograph; Geomorphological analysis (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (6)

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DOI: 10.1007/s11069-016-2471-1

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