{"refrec":{"BRefID":437120,"RR":"<b>Brouwer, R.L.; Schramkowski, G.</b> (2025). Geïdealiseerde processtudie van systeemovergangen naar hypertroebelheid: WP 4.2 Gevoeligheidsstudie. Versie 4.0. <i>WL Rapporten</i>, 13_103_12. Waterbouwkundig Laboratorium: Antwerpen. IX, 36 pp. <a href=\"https://dx.doi.org/10.48607/373\" target=\"_blank\">https://dx.doi.org/10.48607/373</a>","BEntID":434950,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". Versie 4.0. <i>WL Rapporten</i>, 13_103_12. Waterbouwkundig Laboratorium: Antwerpen.  IX, 36 pp. <a href=\"https://dx.doi.org/10.48607/373\" target=\"_blank\">https://dx.doi.org/10.48607/373</a>","DocTypID":13,"DocType":"Reports","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Brouwer, R.L.; Schramkowski, G.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Brouwer, R.L.; Schramkowski, G.","Englishabstract":null,"AbstractOtherLang":"In dit rapport wordt de invloed van turbulente demping op waterbeweging en sedimentverdeling &nbsp;besproken. Turbulente demping treedt bij hoge concentraties op en manifesteert zich doordat de &nbsp;stratificatie van de sedimentkolom een dempende invloed heeft op vertikale uitwisseling &nbsp;(viscositeit en diffusiviteit) en bodemwrijving. Binnen het geformuleerde model wordt turbulente &nbsp;demping bepaald door de relatieve ruwheidshoogte. De sedimentconcentratie wordt daarnaast ook bepaald door de maximale erodeerbaarheid&nbsp; die in een &nbsp;voorgaand rapport (Schramkowski en Brouwer, 2025) is geïntroduceerd.<br>De gevonden &nbsp;residuele sedimentconcentratie langsheen het bekken komt goed overeen met de mediane verdeling op &nbsp;basis van OMES-data.<br>Het model wordt vervolgens gebruikt om de gevoeligheid van waterbeweging en sedimentdynamica voor &nbsp;bek-kenlengte, ruwheidshoogte en erodeerbaarheid te onderzoeken. Bij inkorting van het bekken komt &nbsp;het systeem dichter bij resonantie waardoor het getij achterin het bekken wordt versterkt. Bij &nbsp;verhoging van de ruwheidshoogte neemt de getijamplitude af. De maximale sedimentconcentratie neemt &nbsp;juist toe bij verlenging van het bekken en hogere ruwheidshoogte. Dit paradoxale verschil met het &nbsp;gedrag van het getij kan worden verklaard uit de mate waarin de ruimtelijke variatie van &nbsp;bodemschuifspanning en relatieve erodeerbaarheid samenvallen. Bij het gevoeligheidsonderzoek voor &nbsp;bekkenlengte en ruwheidshoogte worden geen hypertroebele concentraties (&gt;~ 1 g/l) gevonden. <span style=\"color:#231F20;\">Verhoging van de maximale erodeerbaarheid vertaalt zich in een hogere M<sub>4 </sub></span>getijstroming en geeft hypertroebele concentraties tot ~ 20 g/l als M&gt;~ 2 x 10<sup>-4</sup> en de afvoer lager is dan ~ 40 m<sup>3</sup>. Deze condities treden op in het meest opwaartse deel van het estuarium 140- 155 km van Vlissingen).<br>Op basis van deze bevindingen worden tot slot een aantal vragen geformuleerd die in de toekomst &nbsp;nader moeten worden onderzocht om een beter inzicht te krijgen in de fysische mechanismen die &nbsp;aanleiding kunnen geven tot het optreden van hypertroebele sedimentconcentraties. Dit behelst ook &nbsp;de vraag of het ontstaan van dergelijke situaties al dan niet omkeerbaar is.","BibLvlCode":"MS","StandardTitle":"Geïdealiseerde processtudie van systeemovergangen naar hypertroebelheid: WP 4.2 Gevoeligheidsstudie","OrigTitleLangCode":"nl","OrigTitleLangCodeExtended":"dut","OrigTitleLangID":41,"DateLastModified":{"date":"2026-07-14 01:50:49.928414","timezone_type":1,"timezone":"+02:00"},"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":2025,"DateUpdate":"2026-06-19","DateCreate":"2026-01-13","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":null,"monrec":{"MonID":437120,"ISBN":null,"PubliDate":2025,"IssueDate":null,"Volume":"13_103_12","Issue":null,"Pagination":"IX, 36","Place":"Antwerpen","Edition":"Versie 4.0","BRefXtra":null,"BRefXtraRR":null,"SerID":24938,"SerRR":"WL Rapporten. Waterbouwkundig Laboratorium: Antwerpen. 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