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Flood Risk Management Methodology for Lakes and Adjacent Areas: The Lake Pamvotida Paradigm

1
Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research, 19013 Anavissos–Attiki, Greece
2
School of Rural and Surveying Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
3
Department of Civil Engineering, School of Engineering, University of Thessaly, 38334 Volos, Greece
*
Author to whom correspondence should be addressed.
Presented at the 3rd International Electronic Conference on Water Sciences, 15–30 November 2018; Available online: https://ecws-3.sciforum.net.
Proceedings 2019, 7(1), 21; https://doi.org/10.3390/ECWS-3-05825
Published: 15 November 2018
(This article belongs to the Proceedings of ECWS-3)
In recent decades, natural hazards have caused major disasters in natural and man-made environments. Floods are one of the most devasting natural hazards, with high levels of mortality, destruction of infrastructure, and large financial losses. This study presents a methodological approach for flood risk management at lakes and adjacent areas that is based on the implementation of the EU Floods Directive (2007/60/EC) in Greece. Contemporary engineering approaches have been used for the estimation of the inflow hydrographs. The hydraulic–hydrodynamic simulations were implemented in the following order: (a) hydrologic modeling of lake tributaries and estimation flood flow inflow to the lake, (b) flood inundation modeling of lake tributaries, (c) simulation of the lake as a closed system, (d) simulation of the lake outflows to the adjacent areas, and (e) simulation of flood inundation of rural and urban areas adjacent to the lake. The hydrologic modeling was performed using the HEC-HMS model, and the hydraulic-hydrodynamic simulations were implemented with the use of the two-dimensional HEC-RAS model. The simulations were applied to three soil moisture conditions (dry, medium and wet) and three return periods (T = 50, T = 100 and T = 1000 years) and a methodology was followed for the flood inundation modeling in urban areas. Upper and lower estimates on water depths, flow velocities and inundation areas are estimated for all inflow hydrographs and for varying roughness coefficient values. The proposed methodology presents the necessary steps and the results for the assessment of flood risk management and mapping for lake and adjacent urban and rural areas. The methodology was applied to Lake Pamvotida in Epirus, Greece, Ioannina.
Keywords: lakes and adjacent areas flooding; EU Floods Directive; flood risk management; 2D hydraulic modeling; HEC-RAS; ungauged streams lakes and adjacent areas flooding; EU Floods Directive; flood risk management; 2D hydraulic modeling; HEC-RAS; ungauged streams
MDPI and ACS Style

Papaioannou, G.; Loukas, A.; Vasiliades, L. Flood Risk Management Methodology for Lakes and Adjacent Areas: The Lake Pamvotida Paradigm. Proceedings 2019, 7, 21.

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