diplomska naloga
Anja Vihar (Author), Mojca Šraj (Mentor), Dušan Žagar (Thesis defence commission member), Mitja Brilly (Co-mentor)

Abstract

Vse pogosteje smo priča izrednim hidrološkim dogodkom, ki so posledica različnih slučajnih naravnih pojavov. Na slučajne mehanizme narave, ki takšne dogodke sprožijo, ne moremo vplivati, lahko pa se nanje delno pripravimo z analiziranjem preteklih dogodkov. Takšen dogodek predstavljajo tudi poplave. Poznavanje pojava visokih voda nam omogoča učinkovitejše varstvo pred poplavami, ustreznejše načrtovanje rabe prostora ter na splošno boljše gospodarjenje z vodami. Z verjetnostno analizo visokovodnih valov pridobimo informacijo o povezavi med vrednostjo pretoka in njegovo povratno dobo. Določeni poplavni dogodki pa so posledica več sočasnih slučajnih dogodkov. Poplavljanje pritoka pred sotočjem je lahko posledica povečanega pretoka samega pritoka ter sočasnega povečanega pretoka glavnega vodotoka na sotočju, ki povzroči zajezitev pritoka. V primeru, ko meritev pretoka pritoka pred sotočjem nimamo na voljo, lahko verjetnostno porazdelitev gladin pritoka pred sotočjem izračunamo na podlagi meritev pretoka pritoka gorvodno ter meritev pretoka glavnega vodotoka na sotočju z uporabo koincidenčne verjetnostne analize. V diplomski nalogi smo za izračun koincidenčne verjetnostne analize uporabili program HEC-SSP. Izdelali smo koincidenčno verjetnostno analizo visokovodnih valov na sotočju rek Soče in Vipave, pri čemer smo izračunali verjetnostno porazdelitev gladin Vipave v Sovodnjah na osnovi podatkov o pretoku Vipave v Mirnu ter podatkov o pretoku Soče na sotočju. Na gladino Vipave na odseku od sotočja do naselja Miren ob visokih vodah močno vpliva povečan pretok Soče na sotočju, ki povzroča zajezitev in s tem poplavljanje Vipave. Za zmanjšanje verjetnosti poplavljanja Vipave na tem odseku bi bilo zato najprej potrebno urediti strugo reke Soče, tako da ta ob visokih vodah ne bi povzročala zajezitve Vipave v tolikšnem obsegu.

Keywords

gradbeništvo;diplomska naloga;UNI;VKI;pretok;gladina;verjetnostna analiza;HEC-SSP;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: [A. Vihar]
UDC: 519.2:556.166(497.4)(043.2)
COBISS: 6842977 Link will open in a new window
Views: 1772
Downloads: 397
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Other data

Secondary language: English
Secondary title: Coincident frequency analysis of flood waves at the confluence of the Soča and the Vipava river
Secondary abstract: Increasingly, we are witnessing extreme hydrological events caused by various random natural phenomena. We cannot influence the random nature of the mechanisms, which trigger such events, but we can be partially prepared on them by analyzing past events. Floods represent such an event. Knowing the phenomena of high water allows a more efficient flood protection, appropriate land-use planning and an overall better water management. Frequency analysis of flood waves provides information on the relation between the value of the discharge and its return period. Some flood events are the result of multiple concurrent random events. Flooding on a river tributary, for example, can be influenced by both – discharge on that tributary and backwater effects due to discharge on the main stream. Coincident frequency analysis is used to develop a probability distribution for flood phenomena having no observed record when that phenomena is influenced by other random phenomena with available data. In the thesis we implemented a coincidence frequency analysis using the HEC-SSP program. We made the coincident frequency analysis of flood waves at the confluence of the Soča and the Vipava river, whereby we assessed the probability distribution of water levels of the Vipava river in Sovodnje on the basis of discharge data of the Vipava river in Miren and discharge data of the Soča river at the confluence. The water level of the Vipava river in its lower reach near the confluence is highly influenced by increased discharge of the Soča river at the confluence, which causes the backwater of the Vipava river. In order to reduce the probability of flooding of the Vipava river in its lower reach near the confluence, the stream of the Soča river should be first regulated in such a way, that at high water it would not cause the backwater of the Vipava river in such an extent.
Secondary keywords: graduation thesis;civil engineering;discharge;water level;flood frequency analysis;HEC-SSP;
File type: application/pdf
Type (COBISS): Undergraduate thesis
Thesis comment: Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages: XI, 61 str., [4] pril.
ID: 8708510