{"refrec":{"BRefID":393359,"RR":"<b>Schoutens, K.; Temmerman, S.</b> (2021). Tidal marsh stability under very high flow velocities: experiment in the tidal flume facility at the UAntwerp in context of the dike breach experiments in the Hedwige-Prosperpolder as part <br>of the INTERREG POLDER2C's project. INTERREG project POLDER2C’s. Universiteit Antwerpen (UA): Antwerp. 19 pp.","BEntID":391145,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". INTERREG project POLDER2C’s. Universiteit Antwerpen (UA): Antwerp.  19 pp.","DocTypID":13,"DocType":"Reports","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Schoutens, K.; Temmerman, S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Schoutens, K.; Temmerman, S.","Englishabstract":"<span lang=\"EN-US\" dir=\"ltr\">Intense storm or high water events can cause severe stress on dikes eventually leading to a dike &nbsp;breach. Analysis of dike breaches during the North Sea flood in 1953, revealed that the presence of &nbsp;forelands or tidal marshes seems to reduce the dimensions of the dike breach, which limits the volume &nbsp;of flood water and therefore reduces flood risks and increases the time for evacuation. Nevertheless, &nbsp;little is known about the stability, more specific the resistance against erosion, of tidal marsh soils and &nbsp;vegetation under the extreme flow conditions that are generated during a dike breach.</span><br><span lang=\"EN-US\" dir=\"ltr\">Within the framework of the Interreg Polder2C’s project, a controlled lab-flume experiment was &nbsp;conducted in the tidal flume at the University of Antwerp to study the erosivity of a tidal marsh. In winter 2021, marsh monoliths (80 x 120 x 40 cm) were extracted in reed marshes in front of the dikes &nbsp;of Living Lab Hedwige-Prosperpolder (LL HPP*) and installed as a 10 m test section in the lab-flume. &nbsp;Both sediment bed dynamics and vegetation responses were quantified over 6 experimental runs. &nbsp;During each run, extreme flow velocities which can be expected during a dike breach, were applied &nbsp;for 2 hours (up to 2 ms-1 compared to 0-0.2 ms-1 during normal spring tides).</span><br><span lang=\"EN-US\" dir=\"ltr\">First results indicate that the tidal marsh is highly stable. Apart from the organic debris layer which &nbsp;flushed away in the first experimental run, erosion was limited even when aboveground vegetation &nbsp;was removed. During the runs, the reed stems were strongly bent by the water, however the shoots &nbsp;recovered rapidly when the flow stopped. These results emphasize the potential safety function of &nbsp;tidal marshes in the context of nature-based levee and bank protection, even during a dike breach &nbsp;hazard.</span><br><span lang=\"EN-US\" dir=\"ltr\">*Living Lab HPP is a temporary stretch of about 3 km of levees at the Dutch Belgian border available &nbsp;for the (research) experiments and (training) exercises thanks to the realization of the depoldering of &nbsp;Hedwige-Prosperpolder within the framework of the updated Sigmaplan.</span>","AbstractOtherLang":null,"BibLvlCode":"M","StandardTitle":"Tidal marsh stability under very high flow velocities: experiment in the tidal flume facility at the UAntwerp in context of the dike breach experiments in the Hedwige-Prosperpolder as part <br>of the INTERREG POLDER2C's project","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-21 01:51:34.879940","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":2021,"DateUpdate":"2024-07-19","DateCreate":"2024-07-19","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":null,"monrec":{"MonID":393359,"ISBN":null,"PubliDate":2021,"IssueDate":null,"Volume":null,"Issue":null,"Pagination":"19","Place":"Antwerp","Edition":"INTERREG project POLDER2C’s","BRefXtra":null,"BRefXtraRR":null,"SerID":null,"SerRR":null,"Ser2BRefID":null,"Ser2RR":null,"StandardTitleSer":null,"ISSN":null,"AbbrevSer":null,"Degree":null,"ThesisID":null,"InsID":null,"Acronym":null,"FullStandardName":null,"ToPubliDate":null,"SerNotes":null,"eISBN":null,"Pages":19},"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":[{"Surname":null,"Firstname":null,"Initials":null,"PerPublicFlag":null,"InsPublicFlag":1,"Acronym":"WL","OrigNameLangCode":"en","OrigNameLangID":15,"FullOrigName":"Flemish Government; 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