After removing its bank protection works a river can freely evolve not only its bed level but also its width. In this work, numerical modelling techniques of these processes are shown and enhanced. Special focus is lying on the depth-averaged two-dimensional modelling of river bends. Additionally a method is presented, which allows including river widening in one-dimensional numerical models. With the results of physical model tests and observations at natural rivers, the numerical simulation techniques are verified and discussed. At last, a simplified method for estimating bank erosion rates is developed on the basis of a numerical parameter study.
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After removing its bank protection works a river can freely evolve not only its bed level but also its width. In this work, numerical modelling techniques of these processes are shown and enhanced. Special focus is lying on the depth-averaged two-dimensional modelling of river bends. Additionally a method is presented, which allows including river widening in one-dimensional numerical models. With the results of physical model tests and observations at natural rivers, the numerical simulation te...
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