Sproščanje gradiva na erozijskih žariščih v flišu v slovenski Istri
DOI:
https://doi.org/10.3986/AGS.6721Ključne besede:
geomorfologija, geomorfni procesi, erozijski procesi, sproščanje gradiva, umikanje pobočij, geografija, slovenska Istra, SlovenjaPovzetek
Prispevek obravnava sedemletne meritve sproščanja fliša z erozijskega žarišča Strane v povirju Rokave. Meritve sproščanja kamninskega gradiva smo opravljali s pomočjo erozijskih polj, meritve umikanja flišne stene pa tudi s pomočjo erozijskih žebljičev. V analizo smo vključili podatke izbranih meteoroloških časovnih vrst s postaje Portorož– letališče. Izračuni kažejo, da je bila v obdobju 2008–2015 (149 meritev) intenzivnost sproščanja fliša 36kg/m²/leto, stena pa se je umaknila za 146mm oziroma 21mm/leto. Količina sproščenega gradiva je zmerno pozitivno povezana s številom dni med meritvami (r=0,51) ter številom dni s prehodom temperature zraka preko/pod 0°C med dvema meritvama (r=0,56), manj z višino padavin (r=0,45), medtem ko s povprečno dnevno temperaturo (r=–0,29) in povprečno minimalno temperaturo zraka (r=–0,30) kaže nizko negativno povezanost. S povprečno hitrostjo vetra količina ne kaže statistično značilne povezanosti.
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