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The use of the rainfall compound analysis in the process of the design discharge estimation in Slovenia : master thesis no.: 97//II. VOI-FRM
ID Serwińska, Agata (Author), ID Bezak, Nejc (Mentor) More about this mentor... This link opens in a new window, ID Šraj, Mojca (Comentor)

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Abstract
Compound events for a long time did not get enough scientific attention, due to the complexity of these occurrences. Yet, taking synchronisation of various natural process into account can significantly improve the reliability and accuracy of modelling, design and prediction of natural disasters. In this thesis the topic of compound events, especially spatial and temporal clustering of precipitation is addressed. The analysis of the rainfall clustering is performed for the Sava River catchment in Slovenia. For the investigation hourly precipitation values obtained from ARSO (Slovenian Environment Agency) were used. Afterwards, hydrological modelling of the Sava River catchment up to the Čatež gauging station was performed using GR4H model with included snow module. Analysis of temporal clustering shown, that 3 hours period before the extreme precipitation event is the most crucial in terms of contributing into antecedent rainfall amount. Spatial clustering analysis performed on both hourly and daily data shown a distinctive clustering of rainfall in space: very strong clustering pattern in the western are of the catchment with rapid drop in clustering radius towards the eastern part. The results from both clustering analysis and hydrological modelling were used in order to obtain a design rainfall event that could be used as an input for hydrological modelling in ungauged catchments. The design rainfall event was obtained by the use of Huff and intensity-duration-frequency (IDF) curves. Final results show that even on such a small area (i.e., around 10,000 km2), very distinctive precipitation clustering patterns, both in space and time, can be noticed and as such they should be included in the future design of the rainfall events in the flood studies of this area. Overall, it is also highly recommended to keep in mind and pay attention to including possible synchronisation of natural events more frequently in scientific research.

Language:English
Keywords:civil engineering, master thesis, compound events, spatial and temporal precipitation clustering, rainfall event design
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Place of publishing:Ljubljana
Publisher:[A. Serwińska]
Year:2022
Number of pages:55 str.
PID:20.500.12556/RUL-139886-7ae744bc-0c94-b20d-809a-6a5d089d276f This link opens in a new window
UDC:551.577.37:7.021.5(043.3)
COBISS.SI-ID:122121475 This link opens in a new window
Publication date in RUL:08.09.2022
Views:643
Downloads:86
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Secondary language

Language:Slovenian
Title:Uporaba analiz sočasnosti pojava padavin pri določanju projektnih pretokov v Sloveniji : master thesis no.: 97//II. VOI-FRM
Abstract:
Zaradi kompleksnosti pojava sestavljeni dogodki dolgo časa niso bili deležni dovolj znanstvene pozornosti, vendar pa lahko upoštevanje sočasnosti pojava različnih naravnih procesov bistveno izboljša zanesljivost in natančnost modeliranja, načrtovanja in napovedovanja naravnih nesreč. V magistrskem delu je obravnavana tematika sestavljenih dogodkov, predvsem prostorskega in časovnega nastopa padavin. Analiza sočasnosti nastopa padavin je bila izvedena za porečje reke Save v Sloveniji. Za raziskavo so bile uporabljene urne vrednosti padavin, pridobljene od Agencije RS za okolje (ARSO). Dodatno je bil izdelan hidrološki model porečja reke Save do vodomerne postaje Čatež z uporabo modela GR4H z vključenim snežnim modulom. Analiza sočasnosti nastopa padavin je pokazala, da je obdobje treh ur pred ekstremnim padavinskim dogodkom ključno pri upoštevanju predhodne količine padavin. Analiza sočasnega prostorskega nastopa, izvedena na urnih in dnevnih podatkih, je pokazala značilno lastnost padavin na območju Slovenije: relativno izrazit vzorec sočastnosti nastopa v zahodnem delu porečja in nekoliko manj izrazit vzorec v vzhodnemu delu. Rezultati analize sočasnosti nastopa padavin in rezultati hidrološkega modeliranja so bili uporabljeni za določitev projektnega padavinskega dogodka, ki se ga lahko uporabi kot vhodni podatek za hidrološki model v primeru nemerjenih porečij. Skupna količina padavin in porazdelitev med dogodkom je bila določena z uporabo Huffove krivulje in krivulje intenzivnosttrajanje-povratna doba (ITP). Končni rezultati kažejo, da je že na relativno majhnem območju (tj. okoli 10.000 km2) mogoče opaziti zelo izrazite vzorce sočasnosti nastopa padavin, tako v prostoru kot v času, in jih je kot take treba vključiti v določanje projektnih padavinskih dogodkov pri izdelavi hidroloških študij. Na splošno je tudi zelo priporočljivo upoštevati in biti pozoren na pogostejše vključevanje morebitne sočasnosti naravnih procesov v znanstvene raziskave.

Keywords:gradbeništvo, magistrska dela, VOI, sestavljeni dogodki, prostorske in časovne analize, projektni padavinski dogodek

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