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Vodna bilanca dinarskega jelovo-bukovega gozda v Kočevskem Rogu : doktorska disertacija
Vilhar, Urša (Author), Diaci, Jurij (Mentor) More about this mentor... This link opens in a new window, Kajfež-Bogataj, Lučka (Co-mentor), Simončič, Primož (Reviewer), Katzensteiner, Klaus (Reviewer)

URLURL - Presentation file, Visit http://www.digitalna-knjiznica.bf.uni-lj.si/dd_vilhar_ursa.pdf New window

Abstract
V nalogi smo raziskali značilnosti vodnega cikla v procesu naravnega pomlajevanja v dinarskem jelovo-bukovem pragozdu ter v gospodarskem sonaravnemgozdu. Prikazali smo vpliv vrzeli na mikroklimatske razmere ter na posamezne elemente vodne bilance v vegetacijskem obdobju 2003 in 2004 ter pri tem uporabili modeliranje. Uporabili smo "Kloridno metodo" na letni osnovi, kivključuje določitev vsebnosti Cl- v padavinah na prepuščenih padavinah ter vtalni raztopini, enostavnejši model WATBAL, ki računa vodno bilanco z mesečnim časovnim korakom, ter model BROOK90 z dnevnim časovnim korakom. Vremenske spremenljivke smo merili s štirimi meteorološkimi postajami, ki so tekom vegetacijskega obdobja beležile vremenske spremenljivke na izbranih mestih. Ugotovili smo, da je bila dejanska evapotranspiracija največja v sestojih, sledi mladje, najnižja pa je bila v vrzelih. Količine odtoka so bilenajvišje v vrzelih, sledi mladje, najnižje pa so bile v sestojih. Model BROOK90 je na podlagi rezultatov kalibracije, verifikacije in analize občutljivosti modelov najbolje simuliral vodno bilanco na izbranih raziskovalnih ploskvah. Model omogoča spreminjanje številnih parametrov, s katerimi opišemo tip vegetacij, horizontalno in vertikalno zgradbo sestoja terlastnosti tal. Dnevni časovni korak omogoča večjo občutljivost elementov vodne bilance na vremenske razmere, vendar pa model zahteva večje število vhodnih spremenljivk, ki jih ne moremo meriti na terenu.

Language:Slovenian
Keywords:mikroklima gozda, gozdovi, vodna bilanca, modeliranje, naravno pomlajevanje, tvorba vryeli, Kočevski Rog
Work type:Dissertation (m)
Tipology:2.08 - Doctoral Dissertation
Organization:BF - Biotechnical Faculty
Year:2006
Publisher:[Gozdarski inštitut Slovenije]
Number of pages:XLV, 196 str.
Place:Ljubljana
UDC:630*111
COBISS.SI-ID:1646502 Link is opened in a new window
Views:664
Downloads:203
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Secondary language

Language:English
Abstract:
In the current study the water balance in the process of natural regeneration in a managed Dinaric silver fir - beech forest and a virgin forest remnant wasinvestigated. We were interested in how managed and virgin forests influence the microclimate and water balance components. The influence of forest gaps on the microclimate and water balance components was shown for growing seasons in 2003 and 2004 with microclimatic process models. We used the chloride balance on a yearly basis, which needs analysis of Cl- concentrations in throughfall and soil solution, a simple water balance model (WATBAL), which calculates water balance on monthly basis and the BROOK90 model, which calculates water balance on daily basis. Meteorological data werecollected during growing seasons with four weather stations at selected locations. Simulated actual evapotranspiration was highest in the forest stand, lower for the regeneration stand and lowest in the gaps. Simulated drainage flux was highest in the gaps, followed by the regeneration stand and lowest in forest stands. According to calibration and verification based on measured throughfall fluxes and soil moisture contents and sensitivity analysis the BROOK90 model proved best at simulating water balance at selectedresearch sites. The model performed well in a number of options regarding vegetation type, horizontal and vertical structure of forest stand description as well as division of soil into more horizons. Daily intervals make the components of water balance more sensitive to weather conditions but in return increase the number of needed input parameters, which are rarely available for forest stands in remote areas.

Keywords:forest microclimate, water balance, modeling, natural regeneration, gap formation

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