Spin-up phenomenon in morphodynamic modelling

Zhengbing Wang, J van der Werf

Research output: Contribution to conferenceAbstractScientific


Despite the substantial progress in last decades in modelling short-term hydrodynamic and sediment transport processes as well as long-term (centuries) morphological development, the ability of morphodynamic models to simulate medium-term (decades) development of estuaries is still very limited. One of the causes for the limitation is the problem of spin up. Many application of morphodynamic models show that at the beginning of the model simulation model results are unrealistic, and only after a certain period the model gives meaningful results. A extreme example is presented by Dam et al. (2016), who simulated the morphological developments of the Western Scheldt estuary (The Netherlands) for decades to more than a century. They concluded that the performance of the model, expressed in the Brier Skill Score (BSS), first decreases and then increases. The model results are "good" only after many decades. In this study, we aim to obtain more insight into the problem. We try to answer the following questions: x What are the causes of the spin-up problem? x What is the time scale of the spin-up? x What can we do to avoid or minimise the problem?

Original languageEnglish
Publication statusPublished - 2017
Event10th Symposium on River coastal and estuarine morphodynamics: Back to Italy - Trento - Padova, Italy
Duration: 15 Sep 201722 Sep 2017
Conference number: 10


Conference10th Symposium on River coastal and estuarine morphodynamics
Abbreviated titleRCEM2017
CityTrento - Padova
Internet address

Bibliographical note

Host publication:The 10th Symposium on River, Coastal and Estuarine Morphodynamics, Trento-Padova, 15-22 September 2017, Book of Abstracts

Editors: Lanzoni, S., Redolfi, M., Zolezzi, G.
ISBN (Print): 978-88-8443-752-5


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