{"refrec":{"BRefID":359429,"RR":"<b>Coen, L.; Nossent, J.</b> (2022). Numeriek model Zeeschelde en tijgebonden zijrivieren: hindcast stormen eind januari en februari 2022. Versie 4.0. <i>WL Rapporten</i>, 22_034_1. Waterbouwkundig Laboratorium: Antwerpen. XIII, 67 + 68 p. bijl. pp. <a href=\"https://dx.doi.org/10.48607/134\" target=\"_blank\">https://dx.doi.org/10.48607/134</a>","BEntID":357144,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". Versie 4.0. <i>WL Rapporten</i>, 22_034_1. Waterbouwkundig Laboratorium: Antwerpen.  XIII, 67 + 68 p. bijl. pp. <a href=\"https://dx.doi.org/10.48607/134\" target=\"_blank\">https://dx.doi.org/10.48607/134</a>","DocTypID":13,"DocType":"Reports","MarineFlag":0,"FreshFlag":0,"BrackishFlag":1,"TerrestrialFlag":0,"Authorstring":"Coen, L.; Nossent, J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Coen, L.; Nossent, J.","Englishabstract":null,"AbstractOtherLang":"In de maanden januari en februari 2022 zijn drie stormperiodes opgetreden. Op 31 januari 2022 werd een  hoogwaterpeil van 6,94 mTAW gemeten in Antwerpen. In de periode van 17 tot 21 februari 2022 werd de  prewaakdrempel te Antwerpen zes keer overschreden, waarbij één keer ook de waakdrempel overschreden  werd. Tijdens de periode trad het GOG KBR éénmaal in werking. Omdat tijdens de eerste stormperiode, begin  januari 2022, GOG KBR niet in werking getreden is, en om de rekentijd te beperken, werd deze periode niet  in beschouwing genomen voor de hindcast.<br>Het 1D-hydrodynamisch model van het Zeescheldebekken werd geactualiseerd en geherkalibreerd in 2019.  Nadien werden de aanpassingen op het terrein in het model opgenomen, en naar aanleiding van de stormen  in februari 2020 werd een eerste hindcast uitgevoerd (Coen et al., 2020). In tussentijd werden echter nog  aanpassingen uitgevoerd op het terrein. Deze werden in het model geïmplementeerd waar nodig geacht. De  hindcast heeft tot doel de performantie van het geactualiseerde 1D-model tijdens de periodes met springtij  en storm van eind januari en februari 2022 na te gaan. <br>De stormen eind januari 2022 en februari 2022 werden nagerekend met het geactualiseerde model van het  Zeescheldebekken. Hierbij zijn enkel historische meetreeksen als randvoorwaarde gebruikt. Omdat in een  eerste simulatie voor enkele stormen het maximum hoogwater onderschat werd, werd een extra simulatie  uitgevoerd met een hogere topofactor voor de wind. Waterpeilen zijn geëvalueerd ter hoogte van de  meetposten langs de Zeeschelde en tijgebonden zijrivieren, met behulp van VIMM. Ook in de GOG’s worden  waterpeilen geëvalueerd op basis van meetgegevens van aanwezige waterpeilmeters. Uit vergelijking van de  gemeten en gesimuleerde waterpeilen blijkt dat de hogere topofactor niet steeds voor een verbetering van  de gesimuleerde waterpeilen zorgt. Voornamelijk bij grotere windsnelheden wordt het stormhoogwater veel  te sterk opgestuwd met een hogere topofactor. Bij de statistische analyse van de gesimuleerde versus de  gemeten waterpeilen over de volledige simulatieperiode zorgt de verhoogde topofactor voor de wind veelal  voor hogere waarden van bias en RMSE, voornamelijk bij de hoogwaters. Algemeen kan gesteld worden dat  langs de Westerschelde, Zeeschelde en de afwaartse gedeelten van de tijgebonden zijrivieren de  gesimuleerde waterpeilen de metingen vrij goed benaderen. Een aanpassing van de schematisatie van de  riviertakken in de Westerschelde wordt aanbevolen om de modelresultaten verder te verbeteren.<br> In een bijkomende scenarioberekening werd het effect van de GOG-werking van KBR tijdens de storm van  januari 2022 bekeken. 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