De gebeurtenissen tijdens de eindejaarsperiode van 2013 kunnen niet beschouwd worden als een verrassing. De eerste decade van december kende een zeer abnormaal hoog neerslagtotaaL In heel Vlaanderen vielen beperkte neerslaghoeveelheden tussen 16 en 21 december 2012. Op 22 en 23 december vielen de grootste neerslaghoeveelheden. Nadien bleef er het regenen met tussenpozen tot 1 januari 2013. Vanaf half december viel er ongeveer 100-125 mm neerslag in gans Vlaanderen, nog iets meer in Noord-Frankrijk.
Nergens werd melding gemaakt van echt kritieke overstromingen en de voorkomende overstromingen kunnen omschreven worden als typische winteroverstromingen. De waakzaamheid moest echter van voor Kerstmis 2012 tot begin 2013 hoog blijven door de aanhoudende periodes van neerslag. De hele eindejaarsperiode kan dan ook getypeerd worden als een verhaal van 'net niet'. Er sneuvelden geen records.
In dit rapport wordt ingegaan op de vaststellingen in het IJzerbekken, Leie-en Bovenschelde-bekken en Denderbekken. In die bekkens (en hun afwateringen) werden immers de meeste drempelwaardes overschreden tijdens de wasperiode kerst 2012 en kan het effect op gemeten afvoer het grootst genoemd worden. 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