Pregled in uporaba metod določanja sintetičnega histograma padavin

Brezočnik, Samo (author), Šraj, Mojca (mentor)

V prvem delu diplomske naloge so predstavljene različne metode določanja sintetičnega histograma padavin, ki se v svetu uporabljajo najpogosteje. Na kratko je povzeta teorija statistične analize padavinskih dogodkov in statistična orodja, ki jih potrebujemo pri določanju sintetičnega histograma padavin. Predstavljene so krivulje intenziteta-trajanje-povratna doba (ITP) in Huffove krivulje, ki jih potrebujemo pri določanju sintetičnih histogramov padavin. V praktičnem delu diplomske naloge so narejeni primeri različnih sintetičnih histogramov padavin za padavinsko postajo Šmartno pri Slovenj Gradcu z uporabo različnih metod za določanje projektnih padavin, nakar smo le-te uporabili za izračun visokovodnih valov s programom HEC-HMS za porečje Velunje. Predstavljen je tudi vpliv izbire časovnega intervala in vpliv postavitve konice padavin pri določanju sintetičnega histograma na rezultate modeliranja površinskega odtoka. Analiza rezultatov je pokazala razlike med posameznimi metodami. Ugotovili smo razlike med konico površinskega odtoka, časom pojava le-te ter volumnom odtoka. Pri metodah, pri katerih lahko določimo časovni interval, izbira le tega ni imela velikega vpliva na celoten površinski odtok. Ugotovili smo tudi, da lahko pri metodah, ki omogočajo izbiro postavitve konice vrha histograma padavin, vplivamo na pojav konice hidrograma odtoka.

• Language: Slovenian
• Keywords: padavine, sintetični histogram padavin, projektne padavine, hidrološko modeliranje
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [S. Brezočnik]
• Year: 2016
• PID: 20.500.12556/RUL-82907
• UDC: 556.12(043.2)
• COBISS.SI-ID: 7475809
• Publication date in RUL: 03.06.2016

Secondary language

• Language: English
• Title: Review and application of methods for developing synthetic storm hyetographs

Abstract

The first part of this thesis presents the most used synthetic hyetograph methods worldwide. A short summary of statistical analysis of precipitation events is made and the statistical tools needed for designing synthetic hyetographs are presented. The term project storm as well as the IDF and Huff curves are introduced. In the practical part of this thesis synthetic hyetograph were made using different methods for rainfall station Šmartno pri Slovenj Gradcu. They were then used in HEC-HMS hydrological model for computing flood waves of the Velunja River. The influence of the selected time interval and the position of the peak of the precipitation is also presented. Results show the differences amoung considered methods. Differences in peak discharge, time to peak and runoff volume were demonstrated. Methods having the option of choosing the time interval gave similar results for different time intervals. On the other hand, results show that changing the time of the peak of the hyetograph can significantly influence on the time and the peak of the runoff hydrograph.

• Keywords: Rainfall, synthetic hyetograph, design rainfall, hydrological modeling