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Robustness of flood-model calibration using single and multiple events
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för naturgeografi. University of Zurich, Switzerland; Uppsala University, Sweden.ORCID-id: 0000-0002-6314-2124
Vise andre og tillknytning
Rekke forfattare: 52019 (engelsk)Inngår i: Hydrological Sciences Journal, ISSN 0262-6667, E-ISSN 2150-3435Artikkel i tidsskrift (Fagfellevurdert) Epub ahead of print
Abstract [en]

Lack of discharge data for model calibration is challenging for flood prediction in ungauged basins. Since establishment and maintenance of a permanent discharge station is resource demanding, a possible remedy could be to measure discharge only for a few events. We tested the hypothesis that a few flood-event hydrographs in a tropical basin would be sufficient to calibrate a bucket-type rainfall-runoff model, namely the HBV model, and proposed a new event-based calibration method to adequately predict floods. Parameter sets were chosen based on calibration of different scenarios of data availability, and their ability to predict floods was assessed. Compared to not having any discharge data, flood predictions improved already when one event was used for calibration. The results further suggest that two to four events for calibration may considerably improve flood predictions with regard to accuracy and uncertainty reduction, whereas adding more events beyond this resulted in small performance gains.

sted, utgiver, år, opplag, sider
2019.
Emneord [en]
floods, rainfall-runoff model, event-based calibration, value of information, ungauged basins, tropical climate
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-170035DOI: 10.1080/02626667.2019.1609682ISI: 000468686800001OAI: oai:DiVA.org:su-170035DiVA, id: diva2:1329064
Tilgjengelig fra: 2019-06-24 Laget: 2019-06-24 Sist oppdatert: 2020-03-19

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