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Open AccessArticle

A Wave Input-Reduction Method Incorporating Initiation of Sediment Motion

1
Laboratory of Harbour Works, School of Civil Engineering, National Technical University of Athens, Heroon Polytechniou Str. 5, 15780 Zografou, Greece
2
Scientia Maris, Agias Elenis Str. 10, 15772 Zografou, Greece
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2020, 8(8), 597; https://doi.org/10.3390/jmse8080597
Received: 17 July 2020 / Revised: 3 August 2020 / Accepted: 6 August 2020 / Published: 10 August 2020
(This article belongs to the Special Issue Modelling of Harbour and Coastal Structures)
The long-term prediction of morphological bed evolution has been of interest to engineers and scientists for many decades. Usually, process-based models are employed to simulate bed-level changes in the scale of years to decades. To compensate for the major computational effort required by these models, various acceleration techniques have been developed, namely input-reduction, model-reduction and behaviour-oriented modelling. The present paper presents a new input-reduction method to obtain representative wave conditions based on the Shields criterion of incipient motion and subsequent calculation of the sediment pick-up rate. Elimination of waves unable to initiate sediment movement leads to additional reduction of model run-times. The proposed method was implemented in the sandy coastline adjusted to the port of Rethymno, Greece, and validated against two datasets consisting of 7 and 20 and 365 days, respectively, using the model MIKE21 Coupled Model FM. The method was compared with a well-established method of wave schematization and evaluation of the model’s skill deemed the simulations based on the pick-up rate schematization method as “excellent”. Additionally, a model run-time reduction of about 50% was observed, rendering this input-reduction method a valuable tool for the medium to long-term modelling of bed evolution. View Full-Text
Keywords: input reduction; wave schematization; pick-up rate; MIKE21 CM FM; long-term morphological modelling input reduction; wave schematization; pick-up rate; MIKE21 CM FM; long-term morphological modelling
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MDPI and ACS Style

Papadimitriou, A.; Panagopoulos, L.; Chondros, M.; Tsoukala, V. A Wave Input-Reduction Method Incorporating Initiation of Sediment Motion. J. Mar. Sci. Eng. 2020, 8, 597. https://doi.org/10.3390/jmse8080597

AMA Style

Papadimitriou A, Panagopoulos L, Chondros M, Tsoukala V. A Wave Input-Reduction Method Incorporating Initiation of Sediment Motion. Journal of Marine Science and Engineering. 2020; 8(8):597. https://doi.org/10.3390/jmse8080597

Chicago/Turabian Style

Papadimitriou, Andreas; Panagopoulos, Loukianos; Chondros, Michalis; Tsoukala, Vasiliki. 2020. "A Wave Input-Reduction Method Incorporating Initiation of Sediment Motion" J. Mar. Sci. Eng. 8, no. 8: 597. https://doi.org/10.3390/jmse8080597

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