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Morphometric analysis of low mountains for mapping flash flood susceptibility in headwaters

Author

Listed:
  • Balázs Víg

    (University of Pécs)

  • Szabolcs Ákos Fábian

    (University of Pécs)

  • Szabolcs Czigány

    (University of Pécs)

  • Ervin Pirkhoffer

    (University of Pécs)

  • Ákos Halmai

    (University of Pécs)

  • István Péter Kovács

    (University of Pécs)

  • Gábor Varga

    (University of Pécs)

  • József Dezső

    (University of Pécs)

  • Gábor Nagy

    (South-Transdanubian Water Management Directorate)

  • Dénes Lóczy

    (University of Pécs)

Abstract

Morphometric indices from high-resolution DEMs can contribute to the estimation of flash flood susceptibility in mountainous areas. We have screened 25 morphometric indices commonly used in literature, and based on a correlation matrix, selected those which showed the strongest relationship with flash flood generation: area (A), drainage texture (Rt), drainage density (Dd), elongation ratio (Re), form factor (Ff), lemniscate method (k), Gravelius coefficient (GC), forested area (Fa) and relief ratio (Rr). Among them Dd, Rt and Rr had a direct impact on flash flood generation, while A, Re, Fa, Ff, k and GC are in inverse relationship with the intensity of flash floods. Our summary map shows the prioritization of the watersheds on a scale of 0 to 9. The flash flood susceptibility ranking was empirically verified using hydrological data (20-year water regime obtained from 14 official stream gauges). Our conclusions only partially agree with former observations which may be explained by the particular lithology and morphology of the Mecsek Mountains. Since the lower sections of the watersheds are urbanized, for optimal watershed management more detailed GIS analyses of anthropogenic controls on flash flood hazard are needed in the future.

Suggested Citation

  • Balázs Víg & Szabolcs Ákos Fábian & Szabolcs Czigány & Ervin Pirkhoffer & Ákos Halmai & István Péter Kovács & Gábor Varga & József Dezső & Gábor Nagy & Dénes Lóczy, 2022. "Morphometric analysis of low mountains for mapping flash flood susceptibility in headwaters," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 114(3), pages 3235-3254, December.
    • Handle: RePEc:spr:nathaz:v:114:y:2022:i:3:d:10.1007_s11069-022-05513-6
    DOI: 10.1007/s11069-022-05513-6
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    References listed on IDEAS

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    1. Sami Towsif Khan & Fernando Chapa & Jochen Hack, 2020. "Highly Resolved Rainfall-Runoff Simulation of Retrofitted Green Stormwater Infrastructure at the Micro-Watershed Scale," Land, MDPI, vol. 9(9), pages 1-18, September.
    2. Wael M. Elsadek & Mona G. Ibrahim & Wael Elham Mahmod & Shinjiro Kanae, 2019. "Developing an overall assessment map for flood hazard on large area watershed using multi-method approach: case study of Wadi Qena watershed, Egypt," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 95(3), pages 739-767, February.
    3. Timothée Sassolas-Serrayet & Rodolphe Cattin & Matthieu Ferry, 2018. "The shape of watersheds," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
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