{"refrec":{"BRefID":437119,"RR":"<b>Boeckx, L.; De Meester, J.; Deschamps, M.</b> (2025). Laagwaterseizoen 2025: samenvatting seizoen en gepubliceerde laagwaterberichten waterwegen. Versie 4.0. <i>WL Rapporten</i>, PA006_15. Waterbouwkundig Laboratorium: Antwerpen. VII, 33 + 157 p. bijl. pp.","BEntID":434949,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". Versie 4.0. <i>WL Rapporten</i>, PA006_15. Waterbouwkundig Laboratorium: Antwerpen.  VII, 33 + 157 p. bijl. pp.","DocTypID":13,"DocType":"Reports","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Boeckx, L.; De Meester, J.; Deschamps, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Boeckx, L.; De Meester, J.; Deschamps, M.","Englishabstract":null,"AbstractOtherLang":"In dit rapport worden de laagwaterberichten van het HIC die gemaakt zijn in de zomer van 2025 gebundeld &nbsp;en wordt een overzicht voor de hele hydrologische zomer (1 april-30 september) geschetst.<br>In het eerste laagwaterbericht van april 2025 werd aangehaald dat het neerslagoverschot dat werd &nbsp;opgebouwd in de 11 maanden voor de start van het hydrologische jaar 2024-2025 (op 1 oktober 2024) tijdens &nbsp;de hydrologische winter 2024-2025 teniet werd gedaan. De heel lage neerslaghoeveelheden van februari en &nbsp;vooral maart 2025 zorgden voor een eerder droge uitgangssituatie. Ook in de meeste maanden daarna viel &nbsp;tijdens het laagwaterseizoen 2025 minder neerslag dan normaal. Tijdens het laagwaterseizoen 2025 was de &nbsp;meteorologische droogte op basis van de SPI-3 indicator het meest ernstig in het voorjaar (rond mei-juni).<br>Voor alle locaties besproken in de laagwaterberichtgeving, werden de laagste 7-daags gemiddelde afvoeren &nbsp;bereikt eind augustus-begin september 2025. Dat sluit aan bij een normaal verloop van de afvoer doorheen &nbsp;een hydrologische jaar, waarin verwacht kan worden dat de laagste afvoeren aan het einde van de &nbsp;hydrologische zomer voorkomen.<br>Voor de oostelijke en centrale bekkens, lag de afvoer al vanaf maart 2025 onder de normaal. In de westelijke &nbsp;bekkens was dit vanaf ongeveer mei 2025 het geval.<br>Als gevolg hiervan waren de gecumuleerde afvoeren in de zomer van 2025 overal lager dan de normaal &nbsp;(referentieperiode 1991-2020), maar enkel in het oostelijke Netebekken (Kleine Nete te Grobbendonk) werd &nbsp;de laagste waarde sinds het begin van de referentieperiode gemeten. De gemiddelde gecumuleerde afvoer &nbsp;voor de besproken posten tijdens het groeiseizoen 2025 was 18 % lager dan de normaal.<br>De cumulatief afgevoerde volumes in de hydrologische zomer van 2025 waren niet uitzonderlijk laag.<br>&nbsp;Eenzelfde conclusie kan getrokken worden uit een eenvoudige analyse van het aantal dagen onderschrijding &nbsp;van de droogteniveaus zoals vastgelegd in het Vlaams Reactief Afwegingskader voor een aantal belangrijke &nbsp;locaties op de waterwegen. Voor het peil op de IJzer te Lo-Fintele, de aanvoer naar Gent en de Onverdeelde &nbsp;Maasafvoer werd tijdens de zomer van 2025 op geen enkel moment droogteniveau 2 bereikt. Voor &nbsp;droogteniveau 1 was dat wel het geval, maar waren het aantal dagen onderschrijding daarvan niet &nbsp;uitzonderlijk hoog.<br>De maatregelen die op waterwegen genomen werden door de beheerder waren het meest verregaand &nbsp;vanaf de laatste week van augustus tot eind september.<br>Er is aandacht vereist voor de neerslag in de hydrologische winter 2025-2026 die de uitgangssituatie voor &nbsp;de hydrologische zomer van 2026 zal bepalen.","BibLvlCode":"MS","StandardTitle":"Laagwaterseizoen 2025: samenvatting seizoen en gepubliceerde laagwaterberichten waterwegen","OrigTitleLangCode":"nl","OrigTitleLangCodeExtended":"dut","OrigTitleLangID":41,"DateLastModified":{"date":"2026-06-07 01:38:20.059688","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Lage afvoeren; debieten waterwegen; droogtemaatregelen","OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":2025,"DateUpdate":"2026-01-21","DateCreate":"2026-01-13","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":0,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":null,"monrec":{"MonID":437119,"ISBN":null,"PubliDate":2025,"IssueDate":null,"Volume":"PA006_15","Issue":null,"Pagination":"VII, 33 + 157 p. bijl.","Place":"Antwerpen","Edition":"Versie 4.0","BRefXtra":null,"BRefXtraRR":null,"SerID":24938,"SerRR":"WL Rapporten. 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