Ocena ogroženosti naselja Belca pred drobirskim tokom

Kostevc, Miha (author), Kobal, Milan (mentor)

Raziskava je bila izvedena na območju naselja Belca na Gorenjskem. Terensko delo je zajemalo snemanje (posnetki RGB) območja skalnega podora z uporabo brezpilotnega letalnika. V programu Pix4D Mapper je bil izdelan oblak točk ter pravi ortofoto posnetek (TOF), v programu ArcMAP pa digitalni model reliefa (DMR). Na območju proženja je bila na podlagi posnetkov RGB ter TOF in DMR ocenjena potencialna količina podornega gradiva (118.000 m3), ki se lahko še sprosti. Glede na rezultate modela r.avaflow se lahko v strugi hudournika Belca ob potencialnem podoru odloži 116.000 m3 podornega gradiva. Ta količina je bila v nadaljevanju raziskave uporabljena kot vhodni podatek za izvedbo modeliranja drobirskega toka (r.avaflow). Pri modeliranju je bilo preverjenih 10 različnih scenarijev drobirskega toka (glede na volumsko koncentracijo drobirja v toku in glede na količino sproženega gradiva). Rezultati kažejo, da obstaja možnost nadaljnjega proženja skalnega gradiva ter možnost nastanka drobirskega toka, ki lahko ogrozi naselje Belca.

• Language: Slovenian
• Keywords: drobirski tok, skalni podor, Belca, pobočni procesi, brezpilotni letalnik, modeliranje, simulacija drobirskega toka, r.avaflow
• Work type: Bachelor thesis/paper
• Organization: BF - Biotechnical Faculty
• Year: 2018
• PID: 20.500.12556/RUL-103165
• COBISS.SI-ID: 5180582
• Publication date in RUL: 14.09.2018

Secondary language

• Language: English
• Title: Risk assessment of debris flow in settlement Belca

Abstract

The research has been conducted in the area of the settlement Belca in Gorenjska region. The field work included the monitoring (RGB images) of rockfall site using unmanned aerial vehicle. In the Pix4D Mapper, a cloud of points and a true orthophoto (TOF) were generated and in the ArcMAP software a digital elevation model (DEM) was created. On the basis of the RGB, TOF and DEM recordings, the potential amount of rocky material which can still detach was estimated (118,000 m3) at the rockfall site. According to the results of the r.avaflow model, 116,000 m3 of rocky material can be deposited in the Belca torrent. This amount was later used as an input data for the debris flow modeling (r.avaflow). In total, 10 debris flow scenarios were tested (depending on the volume of debris in the debris flow and the amount of triggered material). The results have shown us that there is still a possibility of further detaching of rocky material and that there is a possibility of a debris flow event that could endanger the Belca settlement.

• Keywords: debris flow, rockfall, Belca, slope processes, unmanned aerial vehicle, modeling, debris flow simulation, r.avaflow