Inundation maps for extreme flood events: Case study of Sidi Bel Abbes city, Algeria

• Autorzy: Atallah M. , Hazzab A. , Seddini A. , Ghenaim A. , Korichi K.

Identyfikatory

DOI

10.2478/jwld-2018-0021

Warianty tytułu

PL

Mapy zasięgu w przypadku ekstremalnych powodzi: przykład miasta Sidi Bel Abbes w Algierii

• Języki publikacji: EN

Abstrakty

EN

Hydrodynamic modelling is used to analyse the inundation behaviour of Sidi Bel Abbes city (North-West of Algeria) during extreme flood events. The study reach, 5.4 km in length, is a section of Wadi Mekerra through Sidi Bel Abbes city. Land and bathymetric surveys were used to create a digital terrain model (DTM) of the river channel and the floodplain. By coupling the geometry with hydrologic data, a two dimensional hydrodynamic model was built. The model is based on integrating Saint-Venant shallow waters (depth averaged) equations through Runge–Kutta discontinuous Galerkin numerical scheme. It was calibrated in terms of roughness coefficients on measured values of water surface elevation and discharge registered in the Sidi Bel Abbes gauging station. The objective is to draw the flood maps under extreme river flood event. The results are helpful for local authorities in order to take the appropriate defence measures in the future.

PL

Wykorzystano modelowanie hydrodynamiczne do analizy zasięgu ekstremalnych zjawisk powodziowych w mieście Sidi Bel Abbes w północnozachodniej Algierii. Teren badań stanowił odcinek okresowej rzeki Mekerra długości 5,4 km płynącej przez miasto. Badania naziemne i batymetryczne wykorzystano do zbudowania cyfrowego modelu terenu (DTM) koryta rzeki i obszarów zalewowych. Łącząc geometrię z danymi hydrologicznymi, zbudowano dwuwymiarowy model hydrodynamiczny. Model oparto na integracji równań Saint-Venanta (o uśrednionej głębokości) poprzez nieciągły schemat liczbowy Galerkina wg metody Rungego– Kutty. Model był kalibrowany na współczynnik szorstkości dla zmierzonych wysokości poziomu wody i na odpływ rejestrowany w posterunku pomiarowym Sidi Bel Abbes. Celem pracy było sporządzenie map powodzi w warunkach ekstremalnych zjawisk powodziowych. Wyniki mogą być przydatne władzom lokalnym w podejmowaniu odpowiednich zabiegów ochronnych przed powodzią w przyszłości.

Słowa kluczowe

EN

flood; inundation maps; Runge–Kutta discontinuous Galerkin; Saint-Venant equations; Wadi Mekerra

PL

mapy zalewów; metoda Rungego-Kutty; nieciągły schemat Galerkina; powódź; równania Saint-Venanta; Wadi Mekerra

• Wydawca: Wydawnictwo ITP
• Czasopismo: Journal of Water and Land Development
• Rocznik: 2018
• Tom: no. 37
• Strony: 19--27
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Atallah M.

• Nour Bachir University, Department of Technology, El-Bayadh University Center, BP 900, 32000, Algeria

autor

Hazzab A.

• Taher Moulay University of Saida, Modeling and Computational Methods Laboratory, Saïda, Algeria

autor

Seddini A.

• Tlemcen University, Department of Hydraulics, Faculty of Engineering, Tlemcen, Algeria

autor

Ghenaim A.

• Laboratory of Mechanics and Environment ICUBE / INSA, National Institute of the Applied Sciences, Strasbourg, France

autor

Korichi K.

• Taher Moulay University of Saida, Modeling and Computational Methods Laboratory, Saïda, Algeria

Bibliografia

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