Meteorološka vodna bilanca v vegetacijskem obdobju 1961-2018 za izbrane meteorološke postaje v Sloveniji

diplomsko delo

Katarina Dolinšek (Author), Zalika Črepinšek (Mentor)

Abstract

Za obdobje 1961–2018 (Bilje od 1963 dalje, Portorož od 1993 dalje) smo analizirali meteorološko vodno bilanco na letni skali, v vegetacijskem obdobju (april-september) in za poletje (junij-avgust) za meteorološke postaje Bilje (55 m), Celje (241 m), Godnje (320 m), Ljubljana (299 m), Murska Sobota (188 m), Novo mesto (220 m), Portorož (2 m) in Slovenj Gradec (455 m). Podatki za mesečne padavine in referenčno evapotranspiracijo so iz arhiva Agencije Republike Slovenije za okolje. Za vsa obdobja in postaje smo izračunali povprečne vrednosti, minimume, maksimume ter variacijski razpon za padavine, evapotranspiracijo in vodno bilanco. Med obravnavanimi lokacijami in leti obstaja velika spremenljivost v količini zapadlih padavin, evapotranspiraciji in vodni bilanci. Na letni skali je povprečna vodna bilanca pozitivna na vseh postajah, z izjemo Portoroža, kjer je dolgoletno povprečje vodne bilance ⠒122 mm. Povprečna vodna bilanca poleti je pozitivna samo v Ljubljani in Celju, na ostalih postajah je povprečni primanjkljaj v obravnavanem obdobju od ⠒17 mm v Godnjah do ⠒286 mm v Portorožu. Povprečna vrednost vodne bilance v vegetacijski dobi je negativna v Murski Soboti (⠒98 mm) in Portorožu (⠒353 mm), za ostale postaje je pozitivna, vendar je značilno, da po letu 2000 v tem obdobju prevladuje negativna vodna bilanca na vseh postajah. Izhlapevanje se je povečalo relativno bolj v vegetacijski dobi kot na letni ravni. V vegetacijskem obdobju imata v povprečju največje izhlapevanje Portorož (815 mm) in Murska Sobota (566 mm). Primerjava padavin za obdobji 1961-1990 in 1991-2018 za vsa tri obdobja (leto, poletje, vegetacijska doba) je pokazala, da se na splošno količina padavin v drugem obdobju nekoliko zmanjšuje. Evapotranspiracija je v drugem obdobju povsod višja, največja sprememba je v Biljah (122 mm).

Keywords

vodna bilanca;1961-2018;Slovenija;evapotranspiracija;padavine;

Data

Language:	Slovenian
Year of publishing:	2020
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[K. Dolinšek]
UDC:	551.506:551.57(497.4)(043.2)
COBISS:	29495555
Views:	368
Downloads:	104
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Meteorological water balance in vegetation period 1961-2018 for selected meteorological stations in Slovenia
Secondary abstract:	For the period 1961-2018 (Bilje since 1963, Portorož since 1993) we analyzed meteorological water balance on an annual scale, in vegetation period (April-September) and for summer (June-August) for meteorological locations Bilje (55 m), Celje (241 m), Godnje (320 m), Ljubljana (299 m), Murska Sobota (188 m), Novo mesto (220 m), Portorož (2 m) and Slovenj Gradec (455 m). Data for monthly precipitation and reference evapotranspiration are from archive of Slovenian Environment Agency. For all periods and stations, we calculated average, minimum, maximum and variation range for precipitation, evapotranspiration and water balance. Between the considered locations, there were large differences between precipitation, evapotranspiration and water balance patterns. On an annual scale, average water balance was positive at all stations, with the exception of Portorož, where long-term average for water balance was negative, ⠒122 mm. Average water balance in summer is positive in Ljubljana and Celje, for others stations the water deficit in the period considered ranged from ⠒17 mm in Celje to ⠒286 mm in Portorož. The average water balance in vegetation period is negative in Murska Sobota (⠒98 mm) and Portorož (⠒353 mm), for other stations is positive. However, after the year 2000 negative water balance prevails at all locations. Evapotranspiration increased relatively more during the growing season that on the annual level. On average, Portorož (815 mm) and Murska Sobota (566 mm) have the highest evapotranspiration during vegetation period. A comparison of precipitation for the periods 1961-1990 and 1991-2018 for annual, summer and vegetation period showed that, in general, the amount of precipitation in the second period decreases slightly. Evapotranspiration is higher at all stations in the second period, the largest change is in Bilje (122 mm).
Secondary keywords:	water balance;Slovenia;evapotranspiration;precipitation;
Type (COBISS):	Bachelor thesis/paper
Study programme:	0
Thesis comment:	Univ. v Ljubljani, Biotehniška fak., Oddelek za agronomijo
Pages:	IX, 34 f.
ID:	12038913