Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloApplicability of Kinematic model for mud-flows: An unsteady analysis
Anno di pubblicazione2019
  • Elettronico
  • Cartaceo
Autore/iCristiana Di Cristo Michele Iervolino Tommaso Moramarco Andrea Vacca
Affiliazioni autoriDipartimento di Ingegneria Civile, Edile ed Ambientale, Università degli Studi di Napoli "Federico II", Via Claudio 21, 80125 Napoli, Italy Dipartimento di Ingegneria, Università degli Studi della Campania "Luigi Vanvitelli", Via Roma 29, 81031 Aversa, CE, Italy National Research Council, IRPI, Via Madonna Alta 126, Perugia, Italy
Autori CNR e affiliazioni
  • inglese
AbstractThe Kinematic Wave Model (KWM), representing a simplification of the Full Wave Model (FWM) under the shallow-water approximation, is often used in the one-dimensional formulation for describing the dynamics of debris/mud flood. The present work investigates the applicability conditions of the KWM to analyze mud floods, characterized by a rheological behaviour expressed through a power-law model. The study is carried out through the numerical solution of both the Full and Kinematic Wave models changing the characteristic time of hydrograph, i.e. the wave duration, imposed at the channel inlet. The predictions of the two models are compared in terms of maximum flow depth, maximum discharge and peak discharge at the downstream channel end. The study is performed for several values of the Froude (F) and the Kinematic Wave (K) numbers. Similarly to the clear-water case, present results show that higher errors in applying KWM pertain to shorter flood wave durations, but the performance of KWM appears to strongly depend on the value of the rheological index, becoming worse as the fluid rheology becomes more shear-thinning. The study furnishes applicability criteria representing a guideline for practical applications in terms of minimum wave duration above which the KWM error in reproducing the considered flood characteristics (the maximum flow depth, the maximum discharge and the peak discharge at the downstream channel end) is less or equal than 5%. Finally, it has been shown that the wave period criterion, obtained considering linearized wave dynamics, may be safely applied at least for fluid with moderate shear-thinning behavior and for moderate values of the dimensionless number KF2.
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RivistaJournal of hydrology (Amst.)
Attiva dal 1963
Editore: Elsevier - Oxford ;
Paese di pubblicazione: Paesi Bassi
Lingua: inglese
ISSN: 0022-1694
Titolo chiave: Journal of hydrology (Amst.)
Titolo proprio: Journal of hydrology. (Amst.)
Titolo abbreviato: J. hydrol. (Amst.)
Titoli alternativi:
  • Journal of hydrology (Lausanne) (Amst.)
  • Journal of hydrology (New York) (Amst.)
  • Journal of hydrology (Oxford) (Amst.)
  • Journal of hydrology (Shannon) (Amst.)
  • Journal of hydrology (Tokyo) (Amst.)
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Verificato da refereeSì: Internazionale
Stato della pubblicazionePublished version
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Parole chiaveMud-flow, Power-law rheology, Shear-thinning fluid, Kinematic Wave Model, Unsteady flow
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Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
Moduli/Attività/Sottoprogetti CNR-
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