Analiza suše na območju Slovenije v obdobju od 1940 do 1950

Vezonik, Vid (author), Brenčič, Mihael (mentor)

Diplomsko delo obsega celovito proučevanje pojava ekstremne suše na območju Slovenije ter na mejnem območju z Avstrijo, Italijo, Madžarsko in Hrvaško v letih med 1940 in 1950. V tem opazovanem obdobju je bilo v preteklih zapisih na merilnih mestih v Sloveniji in bližnji soseščini zabeleženo dolgotrajno pomanjkanje padavin, kar se je izrazilo v ekstremno sušnem dogodku. Ekstremno sušno obdobje lahko naknadno izračunamo s standardiziranim padavinskim indeksom (SPI), ki nam na podlagi mesečnih meritev višine padavin pove intenziteto suše v določenem obdobju. SPI lahko računamo za različno dolga obdobja (za 1, 3, 6, 12, 24 in 48 mesecev). V konkretnem primeru SPI3 uporabimo za prikaz kratkotrajnih sušnih obdobij v času treh mesecev, SPI48 bomo uporabili za obdobje 48 mesecev in s tem razkrili dolgotrajne suše, ki na trimesečni ravni opazovanja niso tako izrazite. Ekstremno sušo lahko definiramo, kadar je izračunana vrednost SPI ? - 2.00. Zaradi lepšega pregleda nad ekstremno sušnim obdobjem bomo za izračun uporabili podatke z izbranih merilnih mest od leta 1940 do 1950. Podatkom z merilnih mest bomo določili povprečne letne vrednosti količine padavin. Podatki o količinah mesečnih padavin, ki so potrebni za izračun SPI se nahajajo na spletni strani HISTALP, kjer so zabeležene mesečne vrednosti z različnih merilnih postaj za več kot 100 let. Kasneje bomo v prosto dostopnim programom QGIS-u z interpolacijo prikazali, kje na proučevanem območju je bila suša najintenzivnejša in zavzemala največje območje.

• Language: Slovenian
• Keywords: ekstremna suša, Slovenija, SPI, HISTALP, QGIS
• Work type: Bachelor thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2020
• PID: 20.500.12556/RUL-117443
• COBISS.SI-ID: 23911171
• Publication date in RUL: 10.07.2020

Secondary language

• Language: English
• Title: Historical drought analysis in Slovenia during period between 1940 and 1950

Abstract

The diploma work includes a comprehensive study of the phenomenon of extreme drought in the territory of Slovenia and in the border area with Austria, Italy, Hungary and Croatia between 1940 and 1950. During that period, a long-term lack of rainfall was detected at measuring points in Slovenia and the neighboring neighborhood leading to extreme drought. The extreme dry period can be subsequently calculated by means of i.e. standardized precipitation index (SPI), which tells us the drought intensity in a given period based on monthly rainfall measurements. SPI can be calculated for different long periods (by 1, 3, 6, 12, 24 and 48 months). In the specific case, SPI3 is used to display short-term drought periods over three months, SPI48 will be used for a period of 48 months, thus revealing long-lasting droughts, that are not so pronounced at the three-month observation level. Extreme drought can be defined when the calculated SPI value is 䁤 - 2.00. Due to a better overview of the extreme drought period, we will use the data from the selected measuring points from 1940 to 1950 for the calculation. The data from the measuring points will determine the average annual values of precipitation. Data on the amount of monthly precipitation required for the calculation of the SPI can be found on the HISTALP website, where monthly values from different measuring stations are recorded for more than 100 years. Later, with the free-access QGIS program, the interpolation command will show where in the study area the drought was most intense and occupied the largest area.

• Keywords: extreme drought, Slovenia, SPI, HISTALP, QGIS