{"refrec":{"BRefID":227269,"RR":"<b>Decorte, P.; Vanreppelen-Tirions, Y.</b> (2013). Analyse van uitzonderlijke historische overstromingen en maatgevende afvoeren. MSc Thesis. Katholieke Universiteit Leuven. Faculteit Ingenieurswetenschappen: Leuven.  vii, 130 pp.","BEntID":218990,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". MSc Thesis. Katholieke Universiteit Leuven. Faculteit Ingenieurswetenschappen: Leuven.  vii, 130 pp.","DocTypID":5,"DocType":"Book/Monograph","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Decorte, P.; Vanreppelen-Tirions, Y.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Decorte, P.; Vanreppelen-Tirions, Y.","Englishabstract":"To make an analysis of historic floods, there was the need to compile a database of all floods occurred on the major rivers in Flanders during the last 100 years. First of all, a literature study has been done for Belgium and abroad. Then on the basis of a variety of sources, including newspaper archives and articles, a database was compiled. With this database certain trends in the number of occurred floods could be investigated, both in terms of size and of cause. We have discovered a few trends and oscillations. In general there are periods of more and less floods and the number of floods tend to decrease since 2000. In the second part of this thesis we have made a case study for the Dender. In this study we have calculated a discharge time series with a NAM-model. We have investigated which indicator is the best for predicting floods. This analysis is done for the discharge, the baseflow, the daily rainfall and the rainfall in periods of multiple days. By fitting a logit relation through the empirical flood probability we have found that the baseflow is a good indicator and that the daily rainfall is a bad predictor.","AbstractOtherLang":"Om een analyse te maken van de historische overstromingen werd in eerste instantie een databank opgesteld van de overstromingen van de belangrijkste rivieren in Vlaanderen over een periode vanaf 1900 tot nu. De basis werd gelegd door een literatuurstudie voor België en het buitenland. Vervolgens werd aan de hand van allerlei bronnen, zoals krantenarchieven en artikels, een databank opgemaakt. Hiermee konden trends in het aantal overstromingen onderzocht worden, en dit zowel naar omvang als naar oorzaak. Er zijn slecht zeer weinig trends en oscillaties vast te stellen. Algemeen is vast te stellen dat er periodes zijn met minder en meer overstromingen en dat sinds de eeuwwisseling het aantal overstromingen vermindert. In een tweede deel werden voor een bepaalde rivier, namelijk de Dender, de debiettijdreeks bepaald. Hierbij werd gebruik gemaakt van een NAM-model. Vervolgens werd gekeken voor een aantal indicatoren welke de beste overstromingsvoorspeller is. Hiervoor werden POT-waarden bepaald voor debieten, baseflow, dagelijkse neerslag en de neerslag over verschillende periodes. Door middel van een fitting met een S-curve blijkt dat de baseflow de beste indicator is en de dagelijkse neerslag een slechte voorspeller is. 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