Μαθηματική προσομοίωση της επίδρασης των φερτών υλικών σε πλημμυρικές ροές

Λεβέντης, Παντελής; Leventis, Pantelis

dc.contributor.author	Λεβέντης, Παντελής	el
dc.contributor.author	Leventis, Pantelis	en
dc.date.accessioned	2019-05-16T09:42:29Z
dc.date.available	2019-05-16T09:42:29Z
dc.date.issued	2019-05-16
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/48749
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.16472
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc/3.0/gr/	*
dc.subject	Πλημμύρα	el
dc.subject	Μάνδρα	el
dc.subject	Μαθηματικό μοντέλο	el
dc.subject	Προσομοίωση	el
dc.subject	Στερεομεταφορά	el
dc.subject	Flash flood	en
dc.subject	Mandra	en
dc.subject	Mathematical model	en
dc.subject	Simulation	en
dc.subject	Sediment transport	en
dc.title	Μαθηματική προσομοίωση της επίδρασης των φερτών υλικών σε πλημμυρικές ροές	el
heal.type	bachelorThesis
heal.secondaryTitle	Mathematical simulation of the effect of sediment on flood flows	en
heal.classification	CFD	en
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2018-11-09
heal.abstract	In the present study TELEMAC-MASCARET system was used to simulate the effect of sediment transport and geomorphological changes on the November 15th, 2017 Mandra flood. SISYPHE module was used for the sediment transport/morphological model, fully coupled with a TELEMAC-2D hydrodynamic model. Flash floods (FF) are strong and fast flows that occur from a few minutes to several hours after rainfall (Grutfest & Huber, 1991). They have been associated with intense soil erosion, which results in sediment and debris transport. These occur mainly within catchments in arid and semi-arid areas lacking vegetation, as are many cases in the Mediterranean basin. Climate change has been suggested by recent studies to increase the incidence and the severity of rainfall events as well as the desertification rate of vast areas (IPCC, 1995). The last is expected to lead to an increase in the erosion rate in these areas and consequently the effect of solid materials in flood flows. 2D mathematical models are widely used for flood simulations, where the depth averaged values can be considered. This renders the simulations of natural meandering rivers and channel bends a challenge, due to the fact that the secondary current effects play an important role in both the hydrodynamic flow regime, and the sediment transport/geomorphological processes. In order to study this effect, several simulations of the Yen and Lee (1995) experiments were conducted. The models were calibrated (A. Mendoza et al., 2017) and the predictions of 12 widely used sediment transport formulas were compared to the experimental data. Van Rijn sediment transport formula (1989) predicted a final riverbed morphology that was consistent with the experimental measurements and was incorporated in the Mandra flood model.	en
heal.advisorName	Στάμου, Αναστάσιος	el
heal.committeeMemberName	Μπαλτάς, Ευάγγελος	el
heal.committeeMemberName	Νουτσόπουλος, Κωνσταντίνος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Πολιτικών Μηχανικών. Τομέας Υδατικών Πόρων και Περιβάλλοντος	el
heal.academicPublisherID	ntua
heal.numberOfPages	107 σ.
heal.fullTextAvailability	true