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Computationally efficient modelling of tidal rivers using conceptual reservoir-type models
Meert, P.; Pereira, F.; Willems, P. (2016). Computationally efficient modelling of tidal rivers using conceptual reservoir-type models. Environ. Model. Softw. 77: 19-31. dx.doi.org/10.1016/j.envsoft.2015.11.010
In: Environmental Modelling & Software. Elsevier: Oxford. ISSN 1364-8152, more
Peer reviewed article  

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Author keywords
    Tidal rivers; Conceptual models; Reservoir routing; Computationallyefficient modelling

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Abstract
    Conceptual reservoir-type models of river systems, that mimic the results of detailed hydrodynamic models, provide a powerful tool for numerous river management applications. Thanks to their computationally efficient model structure they are very well suited for applications that require long term simulations or a large number of model iterations. However, one well-known problem is that conceptual models have difficulties to account for backwater effects. For this reason, their application to tidally influenced river reaches so far was almost non-existent. This paper introduces an extension of an existing grey-box reservoir modelling technique to incorporate tidally influenced river reaches. The methodology is demonstrated for the downstream part of the rivers Zenne and Rupel in Belgium. Results show a minor loss of accuracy when the detailed model is replaced by the surrogate conceptual model. Also, the tidal effects are well represented.

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