Establishing a Strategic Blueprint for the Design and Evaluation of Flood Control Infrastructure in Extensive Watersheds

Panagiotis Dimas (), Georgia-Konstantina Sakki, Panagiotis Kossieris, Ioannis Tsoukalas, Andreas Efstratiadis, Christos Makropoulos, Nikos Mamassis and Katia Pipilli
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Panagiotis Dimas: National Technical University of Athens (NTUA)
Georgia-Konstantina Sakki: National Technical University of Athens (NTUA)
Panagiotis Kossieris: National Technical University of Athens (NTUA)
Ioannis Tsoukalas: Democritus University of Thrace (DUTh)
Andreas Efstratiadis: National Technical University of Athens (NTUA)
Christos Makropoulos: National Technical University of Athens (NTUA)
Nikos Mamassis: National Technical University of Athens (NTUA)
Katia Pipilli: GTB ANODOS SA

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 2025, vol. 39, issue 6, No 12, 2673-2700

Abstract: Abstract Triggered by the need for developing a comprehensive flood protection strategy (referred to as the Master Plan) for Western Thessaly in Central Greece, we demonstrate a strategic approach for large-scale hydrosystems, where the need for design accuracy is contrasted to extreme computational burden. The area of interest occupies approximately 6,400 km2, thus constituting a mega-scale hydrological, hydraulic and water management system, which poses multiple conceptual and computational challenges. The overall question is to provide a synthesis of flood protection solutions and prioritize them under a multipurpose prism. The core methodological framework comprises two axes: (i) a semi-distributed representation of the rainfall-runoff transformations and flood routing processes across the entire study area, and (ii) a coupled 1D/2D hydrodynamic simulation, targeted only over the flood prone riverine system and the highly complex network of main artificial channels. Key results show reductions in flood extents by up to 15% in high-risk areas and significant attenuation of peak flows (averaging to 56% across all dam sites). The final planning prioritizes the strengthening of flood protection through the combined influence of a set of large-scale projects, i.e., dikes, multi-purpose dams and retention basins of controlled inundation. The cornerstone objective is to sketch a framework for facing similar studies in a holistic manner, while maintaining a high level of computational efficiency and explainability.

Keywords: Hydrodynamic simulation; Flood risk management; Levee overflow; Reservoir storage; Western Thessaly; Flood mitigation strategies (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1007/s11269-024-04084-4

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