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Standardizirani padavinski indeks - izračun in analiza za Slovenijo
ID Dornik, Matej (Author), ID Šraj, Mojca (Mentor) More about this mentor... This link opens in a new window

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MD5: 9C1E8590C72DEC14784944225BDB7831
PID: 20.500.12556/rul/351b3464-f45b-4fd0-8dfa-1d609fb3aac1

Abstract
V zadnjih letih so ekstremni hidrološki dogodki vse pogostejši in izrazitejši. Suša je v primerjavi s poplavo precej bolj kompleksen pojav, saj je težko ugotoviti njen začetek in konec, njeno pojavljanje pa je prostorsko in časovno zelo težko omejiti. Prav tako povzroča veliko gospodarsko škodo. Na splošno je osnovni vzrok suše pomanjkanje padavin ter čas, porazdelitev in intenzivnost primanjkljaja padavin na nekem območju. Obstajajo različni kazalniki, s katerimi določamo časovne in prostorske dimenzije suše. Eden od pogosteje uporabljenih je standardizirani padavinski indeks (SPI), za izračun katerega potrebujemo le podatke o količini padavin za vsaj 30-letno obdobje. V nalogi smo izračunali vrednosti indeksa SPI za obdobje 1951-2014 na šestih časovnih skalah za dvajset izbranih meteoroloških postaj v Sloveniji. Ugotovili smo, da se na krajših časovnih skalah pojavlja večje število sušnih dogodkov, vendar pa od leta 1990 opažamo daljša sušna obdobja z večjo jakostjo. Suša se ne pojavlja enotno in istočasno na celotnem območju Slovenije. Pojavlja pa se v podobnih vzorcih pri podobnih prostorskih in klimatskih pogojih.

Language:Slovenian
Keywords:Suša, padavine, jakost, gama porazdelitev, standardiziran padavinski indeks, časovna skala, Slovenija
Work type:Undergraduate thesis (m5)
Typology:2.11 - Undergraduate Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2016
Publisher:[M. Dornik]
Place:Ljubljana
PID:20.500.12556/RUL-83129 This link opens in a new window
UDC:519.2:556.12(497.4)(043.2)
COBISS.SI-ID:7480929 This link opens in a new window
Publication date in RUL:07.06.2016
Views:1883
Downloads:446
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Secondary language

Language:English
Title:Standardized precipitation index - calculation and analysis for Slovenia
Abstract:
In recent years extreme hydrological events are becoming more frequent and pronounced. In comparison with flood drought is a much more complex phenomenon because it is difficult to determine its beginning and end; furthermore its occurrence is very difficult to limit in time and space. It also causes considerable economic damage. In general the primary cause of drought is the lack of rainfall, and at the same time also time of the occurrence of the rainfall deficit, its distribution and intensity in a specific area. There are various indicators that determine time and space dimensions of drought. One of the most frequently used is the standardized precipitation index (SPI), the calculation of which requires only data of rainfall for at least a period of 30-years. In the thesis we calculated the values of SPI index for twenty selected meteorological stations in Slovenia for the period 1951 to 2014 on six time scales. We found that on shorter time scales larger number of drought appeared, but since 1990 increased drought periods with greater intensity were observed. Drought does not occur uniformly and simultaneously throughout Slovenia, however it occurs in similar patterns at similar spatial and climatic conditions.

Keywords:Drought, precipitation, intensity, gama distribution, standardised precipitation index, times scale, Slovenia

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