Climate, orography and scale controls on flood frequency in Triveneto (Italy)
| Autor: | Attilio Castellarin, Alessio Domeneghetti, Armando Brath, Jose Luis Salinas, Simone Persiano |
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| Přispěvatelé: | A. H. Schumann, G. Blöschl, A. Castellarin, J. Dietrich, S. Grimaldi, U. Haberlandt, A. Montanari, D. Rosbjerg, A. Viglione, and S. Vorogushyn, Persiano, Simone, Castellarin, Attilio, Salinas, Jose Lui, Domeneghetti, Alessio, Brath, Armando |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Estimation
lcsh:GE1-350 010504 meteorology & atmospheric sciences Meteorology Flood frequency analysis lcsh:QE1-996.5 0207 environmental engineering GEV distribution Triveneto Flood Frequency analysis statistical regionalization L-moments Orography 02 engineering and technology General Medicine 01 natural sciences lcsh:Geology Geography Effects of global warming Climatology 100-year flood Generalized extreme value distribution Hydrometeorology 020701 environmental engineering Scale (map) lcsh:Environmental sciences 0105 earth and related environmental sciences |
| Zdroj: | Proceedings of the International Association of Hydrological Sciences, Vol 373, Pp 95-100 (2016) |
| ISSN: | 2199-899X |
| Popis: | The growing concern about the possible effects of climate change on flood frequency regime is leading Authorities to review previously proposed reference procedures for design-flood estimation, such as national flood frequency models. Our study focuses on Triveneto, a broad geographical region in North-eastern Italy. A reference procedure for design flood estimation in Triveneto is available from the Italian NCR research project "VA.PI.", which considered Triveneto as a single homogeneous region and developed a regional model using annual maximum series (AMS) of peak discharges that were collected up to the 1980s by the former Italian Hydrometeorological Service. We consider a very detailed AMS database that we recently compiled for 76 catchments located in Triveneto. All 76 study catchments are characterized in terms of several geomorphologic and climatic descriptors. The objective of our study is threefold: (1) to inspect climatic and scale controls on flood frequency regime; (2) to verify the possible presence of changes in flood frequency regime by looking at changes in time of regional L-moments of annual maximum floods; (3) to develop an updated reference procedure for design flood estimation in Triveneto by using a focused-pooling approach (i.e. Region of Influence, RoI). Our study leads to the following conclusions: (1) climatic and scale controls on flood frequency regime in Triveneto are similar to the controls that were recently found in Europe; (2) a single year characterized by extreme floods can have a remarkable influence on regional flood frequency models and analyses for detecting possible changes in flood frequency regime; (3) no significant change was detected in the flood frequency regime, yet an update of the existing reference procedure for design flood estimation is highly recommended and we propose the RoI approach for properly representing climate and scale controls on flood frequency in Triveneto, which cannot be regarded as a single homogeneous region. |
| Databáze: | OpenAIRE |
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