07 colate detritiche_deposizione_en
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The document discusses debris flow deposition and effects. It notes that as a debris flow's velocity decreases due to a declining slope, solid particles will begin to deposit. The deposition rate and runout area depend on flow velocity - higher velocities result in larger runout areas. Where debris flows reach flat areas or channels, large deposition fans can form. Examples show debris flows destroying structures in their path and burying infrastructure like roads.
07 colate detritiche_deposizione_en
- 1. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows Debris Flow: the deposition
- 2. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows When the bed slope decreases the component of weight force normal to the flow increases and the flow velocity decreases entailing the decrease of the buoyancy force. Therefore, the buoyancy force cannot oppose to the component of weight force normal to the flow so that solid particles begin to deposite. Deposition rate depend on the flow velocity. The larger the velocity the higher the debris flow runout area. The extension of the deposition area depend on the flow velocity and on the solid volume. The higher the flow velocity and the solid volume, the larger in length and width the run out area. Debris flow of large size that reach the valley bottom with high velocity need large area to stop. The impact of the debris flow on the obstacle it come across depends on the flow velocity and concentration of the solid phase. The higher the larger the destruptions. Deposition
- 3. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows Deposition on slopes - 1 Deposits on the scree beneath Punta Dina (San Vito di Cadore) of the debris flow occurred the 4th of August 2015
- 4. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows Deposition on slopes - 2 Deposits on the woods overhanging Tre Croci Pass (Three crosses pass) given by the debris flow occurred the 29th of July 2019
- 5. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows Deposition on slopes - 3 Deposits on the scree of Val Giralba (Auronzo) given by the debris flow occurred the 8th of August 2009
- 6. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows Debris flow occurred at Rovina di Cancia the 23th of July 2015 Deposits on flat area built for stop debris flow Debris flow occurred at Rovina di Cancia the 4th of August 2015
- 7. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows Fiames, SS 51 km 108 Fiames, SS 51 km 109 Deposition on channel - 1
- 8. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows Deposition on channel - 2 Debris flow occurred at Rovina di Cancia the 23th of July 2015
- 9. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows Deposits of debris flow occurred the 17th of July 2015 on the Gere torrent Deposition on channel - 3
- 10. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows The effect of a debris flow - 1 Val Pola
- 11. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows Chieppena torrent (Trentino) November 1966 Venzo e Largaiolli (1968) The effect of a debris flow - 2
- 12. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows The village of Chiapuzza (San Vito di Cadore, BL) after the debris flow of the 4th of November 1966 The effect of a debris flow - 3
- 13. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows The effect of a debris flow - 4 Debris flow deposits after the event of 7 August 1996 in Borca di Cadore (Cancia debris flow)
- 14. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows The effect of a debris flow - 5 Val Pola Nusdorf Debant, Drava Valley, Lienz, Austria - After the debris flow occurred on August 1997 (Fuchs et al., 2007)
- 15. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows The effect of a debris flow - 6 Val Pola Results from the spilling of mud water from the retaining basin upstream Borca di Cadore (BL) the 18th of July 2009 Retaining wall
- 16. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows The effect of a debris flow - 7 Val Pola Hamlet of Campolongo di Baselga di Pin竪 (TN) after the debris flow occurred the 15th of August 2010
- 17. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows The effect of a debris flow - 8 Val Pola The National Road SS. 51 (km 97.500) between Cortina dAmpezzo and San Vito di Cadore (BL) flooded by the debris flow occurred the 8th of August 2015.
- 18. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows The effect of a debris flow - 7 Val PolaBayi watershed (Longxi river), Wenchuan , China; after the big earthquake of 2008 intese rainfall triggered several debris flows the 13-14th of August 2010
- 19. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows The effect of a debris flow - 8 Val Pola Bayi watershed (Longxi river), Wenchuan , China; after the big earthquake of 2008 intese rainfall triggered severa debris flows the 13-14th of August 2010
- 20. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows The effect of a debris flow - 9 Val Pola Bayi watershed (Longxi river), Wenchuan , China; after the big earthquake of 2008 intese rainfall triggered several debris flows the 13-14th of August 2010
- 21. Carlo Gregoretti26/5/2017 Mekelle University - Debris Flows Reference Fuchs, S., Heiss, K., Huebl J., 2007. Towards an empirical vulnerability function for use in debris flow risk assessment. Nat. Hazards Earth Syst. Sci. 7, 495-506.