{"refrec":{"BRefID":391723,"RR":"<b>Dujardin, A.; Houthuys, R.; Nnafie, A.; Röbke, B.; van der Werf, J.; de Swart, H.E.; Biernaux, V.; De Maerschalck, B.; Dan, S.; Verwaest, T.</b> (2024). MOZES – Research on the Morphological Interaction between the Sea bottom and the Belgian Coastline: Working year 2. Version 4.0. <i>FH reports</i>, 20_079_2. Flanders Hydraulics: Antwerp. IX, 132 + 30 p. app. pp. <a href=\"https://dx.doi.org/10.48607/244\" target=\"_blank\">https://dx.doi.org/10.48607/244</a>","BEntID":389470,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". Version 4.0. <i>FH reports</i>, 20_079_2. Flanders Hydraulics: Antwerp.  IX, 132 + 30 p. app. pp. <a href=\"https://dx.doi.org/10.48607/244\" target=\"_blank\">https://dx.doi.org/10.48607/244</a>","DocTypID":13,"DocType":"Reports","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Dujardin, A.; Houthuys, R.; Nnafie, A.; Röbke, B.; van der Werf, J.; de Swart, H.E.; Biernaux, V.; De Maerschalck, B.; Dan, S.; Verwaest, T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Dujardin, A. <i>et al.</i>","Englishabstract":"<span lang=\"EN-US\" dir=\"ltr\">The MOZES-project (MOrfolgische interactie kustnabije ZEebodem en Strand) investigates the &nbsp;morphodynamic interaction between the Belgian offshore seabed (inner shelf + nearshore) and adjacent &nbsp;shoreline across varying time scales (months to centuries). The project aims to enhance the understanding &nbsp;of the region's morphodynamics for effective coastal management.</span><br><span lang=\"EN-US\" dir=\"ltr\">This report outlines progress in four Work Packages (WP1, WP2, WP3 and WP4) during the second project &nbsp;year. WP1 addressed analysis of field data, WP2 involved the further development of the idealized models established in the first year, WP3 delved into investigating the hypothesis of natural beach feeding through &nbsp;sediment transport over shoreface-connected sand ridges using the complex numerical models FlemCo and &nbsp;Scaldis-Coast. Finally, using the latter two models, WP4 examined the effects of the observed deepening of &nbsp;nearshore channels on beach erosion.</span><br><span lang=\"EN-US\" dir=\"ltr\"><strong>WP1:</strong> Further digitization of bathymetric and beach topographic data and the collection of bed sediment &nbsp;data. The depth uncertainty of bathymetric surveys was analyzed; yielding an empirical uncertainty of &nbsp;± 0.15 m. The produced data confirm that over the last four decades, the base of the shoreface suffers &nbsp;structural erosion. In a case study of Pas van Stroombank, the routinely reported \"Bagger Informatie &nbsp;Systeem\" (BIS) parameter \"reduced volume\" correlates well with the surveyed volume differences. &nbsp;Longitudinal transport over Stroombank was estimated in 2014 to be about 100 m³/m. In Kleine Rede, &nbsp;sediment transport was in 2010 about 4 times higher.</span><br><span lang=\"EN-US\" dir=\"ltr\">&nbsp;<strong>WP2</strong>: Efforts were concentrated on further developing 1) the morphodynamic shelf model and 2) the coupled &nbsp;morphostatic (i.e., bottom does not change) shelf-shoreline model established in the first year. The &nbsp;development of the morphodynamic shelf model marked an important step forward, enabling the simulation &nbsp;of self-developing shoreface-connected sand ridges by incorporating (for the first time!) wave-topography &nbsp;feedbacks. The simulated ridges resemble those observed on the Belgian shelf, although some differences &nbsp;are noted. Significant improvements were made to the coupled shelf-shoreline model, enabling the &nbsp;reproduction of observed shoreline progradation (erosion) adjacent to the ridge crest (channel) and the &nbsp;steeper bathymetry profile in the breaker zone near the channel compared to that near the crest. Simulations &nbsp;with this model indicate that the observed onshore movement of ridges on the Belgian shelf is likely to &nbsp;intensify shoreline retreat near the channels and progradation near the ridge crests. Finally, a new analytical &nbsp;tide model showed that wave-induced sediment transport dominates in the breaker zone, while tide-induced &nbsp;transport becomes significant further offshore. These findings qualitatively align with results from FlemCo &nbsp;and Scaldis-coast models.</span><br><span lang=\"EN-US\" dir=\"ltr\"><strong>WP3:</strong> Primary focus was to understand the observed differences between simulated longshore sediment &nbsp;transport and sediment pathways over ridges by the Scaldis-Coast and FlemCo models. Results from &nbsp;sensitivity runs revealed that these differences primarily stem from a larger wave-induced longshore &nbsp;sediment transport in Scaldis-Coast compared to FlemCo. As was found by the idealized model (WP2), &nbsp;these results confirm that wave-induced sediment transport dominates in the breaker zone, while</span><!--[if !supportFootnotes] [1]<!--[endif] induced transport becomes significant further offshore. Finally, these results do not indicate an onshore<!--[if !supportFootnotes] [1]<!--[endif] directed component of the residual sediment transport towards the beaches. However, no firm conclusion  regarding the process of natural feeding is possible from this as these models do not include cross-shore  processes in a validated way.<br>  WP4: Model results from sensitivity runs using different synthetic bathymetries in the Knokke-Heist region  (shallower Appelzak channel and a deeper Paardenmarkt ridge, situation of 1986) provide no clear evidence  that a deeper Appelzak channel or a steeper shoreface leads to more erosion on the beaches of  Knokke-Heist. As emphasized in WP3, given the absence of 3D cross-shore processes in the Scaldis-Coast and  Flemco models, it is crucial to interpret these results with caution. Therefore one cannot conclude about the  effect of channel deepening on beach erosion yet.</span></body> </body> tide-induced transport becomes significant further offshore. Finally, these results do not indicate an onshore directed component of the residual sediment transport towards the beaches. However, no firm conclusion regarding the process of natural feeding is possible from this as these models do not include cross-shore processes in a validated way.</span><span lang=\"EN-US\" dir=\"ltr\"><strong>WP4</strong>: Model results from sensitivity runs using different synthetic bathymetries in the Knokke-Heist region (shallower Appelzak channel and a deeper Paardenmarkt ridge, situation of 1986) provide no clear evidence that a deeper Appelzak channel or a steeper shoreface leads to more erosion on the beaches of Knokke-Heist. As emphasized in WP3, given the absence of 3D cross-shore processes in the Scaldis-Coast and Flemco models, it is crucial to interpret these results with caution. Therefore one cannot conclude about the effect of channel deepening on beach erosion yet.</span></body> </body> </body> </body> </body> </body> </body> </body> </body> </body> </body> ","AbstractOtherLang":null,"BibLvlCode":"MS","StandardTitle":"MOZES – Research on the Morphological Interaction between the Sea bottom and the Belgian Coastline: Working year 2","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-22 01:42:02.299298","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":2024,"DateUpdate":"2026-01-08","DateCreate":"2024-04-10","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":null,"monrec":{"MonID":391723,"ISBN":null,"PubliDate":2024,"IssueDate":null,"Volume":"20_079_2","Issue":null,"Pagination":"IX, 132 + 30 p. app.","Place":"Antwerp","Edition":"Version 4.0","BRefXtra":null,"BRefXtraRR":null,"SerID":362151,"SerRR":"FH reports. 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