Performance evaluation of wave input reduction techniques for modeling inter-annual sandbar dynamics

Bruna de Queiroz*, Freek Scheel, Sofia Caires, Dirk Jan Walstra, Derrick Olij, Jeseon Yoo, Ad Reniers, Wiebe de Boer

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
68 Downloads (Pure)


In process-based numerical models, reducing the amount of input parameters, known as input reduction (IR), is often required to reduce the computational effort of these models and to enable long-term, ensemble predictions. Currently, a comprehensive performance assessment of IR-methods is lacking, which hampers guidance on selecting suitable methods and settings in practice. In this study, we investigated the performance of 10 IR-methods and 36 subvariants for wave climate reduction to model the inter-annual evolution of nearshore bars. The performance of reduced wave climates is evaluated by means of a brute force simulation based on the full climate. Additionally, we tested how the performance is affected by the number of wave conditions, sequencing, and duration of the reduced wave climate. We found that the Sediment Transport Bins method is the most promising method. Furthermore, we found that the resolution in directional space is more important for the performance than the resolution in wave height. The results show that a reduced wave climate with fewer conditions applied on a smaller timescale performs better in terms of morphology than a climate with more conditions applied on a longer timescale. The findings of this study can be applied as initial guidelines for selecting input reduction methods at other locations, in other models, or for other domains.

Original languageEnglish
Article number148
Number of pages21
JournalJournal of Marine Science and Engineering
Issue number5
Publication statusPublished - 2019


  • Input reduction
  • Markov Chain
  • Monte Carlo
  • Morphodynamics
  • Process-based modeling
  • Sandbars
  • Sequencing
  • Wave climate


Dive into the research topics of 'Performance evaluation of wave input reduction techniques for modeling inter-annual sandbar dynamics'. Together they form a unique fingerprint.

Cite this