Sezonskost mesečnih pretokov v Sloveniji

Povzetek

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Jezik:	Slovenski jezik
Leto izida:	2008
Izvor:	Ljubljana
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL FGG - Fakulteta za gradbeništvo in geodezijo
Založnik:	[T. Zgonik]
UDK:	556.535(497.4)(043.2)
COBISS:	3885921
Št. ogledov:	1838
Št. prenosov:	446
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Seasonality of monthly discharges in Slovenia
Sekundarni povzetek:	Runoff regimes are good indicators of climate changes. The graduation thesis discusses the definition of runoff regime types for selected rivers in the period from 1971 – 2000. The method of "discriminant periods" is used, as it was in the study of the Danube catchment. Regarding to the chosen method, 7 regime types were determinated in Slovenia. Regarding to this determination the stability, as it was proposed by Nováky (2001), was computed for all the used water gauging stations. The results had shown that maximum hydrological events have more influence on the stability of a certain regime, then the minimum hydrological events. In the second part the up mentioned method was compared with the method for hierarchical clustering, with which the last grouping of Slovenian rivers in to discharge regimes was made, using the period from 1961 to 1990. Discharge regimes were also defined for the period from 1971 to 2000, using the same clustering method. Besides this the grouping was also made for both periods together. The similarity among gauging stations was calculated on the basis of the Manhattan distance, but for their clustering in to groups the Ward’s method was used. The comparison between two periods and two methods has shown important climate changes and with that the time distribution of high and low waters, changes of type of precipitation due to higher temperatures and lesser differences between regime types. Finally we wanted to determinate the Nováky’s empirical classes of runoff regime stability so that they would have an arithmetic background. To reach that, we compared them with Pearson’s coefficients of correlation. With their modeled values, we proposed new stability classes.
Sekundarne ključne besede:	runoff regime;water regime;hydrology;seasonality;river discharges;Slovenia;statistical analysis
Vrsta datoteke:	application/pdf
Vrsta dela (COBISS):	Diplomsko delo
Komentar na gradivo:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Strani:	XIV f., 115 str., pril.
Vrsta dela (ePrints):	thesis
Naslov (ePrints):	Seasonality of monthly discharges in Slovenia
Ključne besede (ePrints):	odtočni režim;vodni režim;hidrologija;sezonskost;pretoki rek;Slovenija;statistična analiza
Ključne besede (ePrints, sekundarni jezik):	runoff regime;water regime;hydrology;seasonality;river discharges;Slovenia;statistical analysis
Povzetek (ePrints):	Odtočni režimi so dobri pokazatelji klimatskih sprememb. Diplomska naloga obravnava določitev le-teh na izbranih slovenskih vodotokih za obdobje 1971 - 2000 po zgledu študije porečja Donave in v njej uporabljene metode "diskriminantnih period". Glede na izbrano metodo smo v Sloveniji določili 7 režimskih tipov. Glede na pripadnost določenemu režimskemu tipu, smo nato uporabljenim vodomernim postajam določili še njihovo stabilnost z uporabo enačb Novákya (2001), pri čemer se je izkazalo, da na stabilnost določenega odtočnega režima bolj vplivajo maksimalni kot minimalni hidrološki dogodki. Metodo smo v drugem delu primerjali z metodo hierarhičnega grupiranje, s katero je bila izvedena zadnja členitev slovenskih vodotokov v pretočne režime za obdobje 1961 – 1990. Z metodo hierarhičnega grupiranja smo določili pretočne režime tudi za obdobje 1971 – 2000, poleg tega pa smo to grupiranje izvedli tudi za obe obdobji hkrati. Podobnost med vodotoki smo računali na podlagi razdalje Manhattan, njihovo razvrščanje v skupine pa z Wardovo metodo. Primerjava med obdobji in metodami je pokazale pomembne spremembe klime in s tem razporeditve deževnih in sušnih obdobij, spremembe oblike padavin zaradi povečanja temperatur in vedno manjše razlike med posameznimi režimskimi tipi. Nazadnje smo želeli mejam, ki jih je Nováky podal za določanje kategorij stabilnosti, določiti računsko ozadje. To smo storili s primerjavo s Pearsonovimi koeficienti korelacije. Z njihovim modeliranjem smo predlagali nove meje kategorij stabilnosti.
Povzetek (ePrints, sekundarni jezik):	Runoff regimes are good indicators of climate changes. The graduation thesis discusses the definition of runoff regime types for selected rivers in the period from 1971 – 2000. The method of "discriminant periods" is used, as it was in the study of the Danube catchment. Regarding to the chosen method, 7 regime types were determinated in Slovenia. Regarding to this determination the stability, as it was proposed by Nováky (2001), was computed for all the used water gauging stations. The results had shown that maximum hydrological events have more influence on the stability of a certain regime, then the minimum hydrological events. In the second part the up mentioned method was compared with the method for hierarchical clustering, with which the last grouping of Slovenian rivers in to discharge regimes was made, using the period from 1961 to 1990. Discharge regimes were also defined for the period from 1971 to 2000, using the same clustering method. Besides this the grouping was also made for both periods together. The similarity among gauging stations was calculated on the basis of the Manhattan distance, but for their clustering in to groups the Ward’s method was used. The comparison between two periods and two methods has shown important climate changes and with that the time distribution of high and low waters, changes of type of precipitation due to higher temperatures and lesser differences between regime types. Finally we wanted to determinate the Nováky’s empirical classes of runoff regime stability so that they would have an arithmetic background. To reach that, we compared them with Pearson’s coefficients of correlation. With their modeled values, we proposed new stability classes.
Ključne besede (ePrints, sekundarni jezik):	runoff regime;water regime;hydrology;seasonality;river discharges;Slovenia;statistical analysis
ID:	8309023