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Water Resources Management

Erschienen in:

08.11.2020

A Numerical Model for 1D Bed Morphology Calculations

verfasst von: Hriday Mani Kalita

Erschienen in: Water Resources Management | Ausgabe 15/2020

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Abstract

The present work proposes a new morphodynamic model for flow simulation in open channels. The governing one dimensional (1D) shallow water equations along with the Exner sediment continuity equation are solved here using coupled approach. A TVD based MacCormack predictor corrector method is used here for solution of the coupled governing equations. The developed numerical model is used to replicate several test cases of known experimental and approximate solutions. These cases include bed aggradation due to sediment overloading, bed degradation due to sediment shut-off, dam break flow over erodible bed and movable bump due to subcritical and transcritical flows. The results obtained are found to be excellent and free from oscillations near sharp gradient. The numerical model is also found to be capable of capturing the wave-fronts of both water surface and bed sediment. Quantitative analysis of the results in terms of two statistical parameters establishes the potential of the present model in more complicated practical problems.

Vorheriger Artikel Influence of Weak Bed-Load Transport on Mean Flow Characteristics over Immobile Smooth Bed Surface under Dynamic Equilibrium Flow Conditions

Nächster Artikel Predictability of Monthly Streamflow Time Series and its Relationship with Basin Characteristics: an Empirical Study Based on the MOPEX Basins

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Titel: A Numerical Model for 1D Bed Morphology Calculations
verfasst von: Hriday Mani Kalita
Publikationsdatum: 08.11.2020
Verlag: Springer Netherlands
Erschienen in: Water Resources Management / Ausgabe 15/2020
Print ISSN: 0920-4741
Elektronische ISSN: 1573-1650
DOI: https://doi.org/10.1007/s11269-020-02707-0

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