SavedAdd your journal

Journals / Gazi University Journal of Science / 2007 / Cilt: 20 - Sayı: 3

Effect of the Voellmy Coefficients on Determining Run-out Distance: A Case Study at Uzungöl, Turkey

Önder KOÇYİĞİT
İbrahim GÜRER
Pages
79–85
Publication Date
2010-03-29
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Key Words: Voellmy coefficients, Run-out distance, Avalanche dynamic, UzungÖl

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, the traditional Voellmy model which has been widely applied since 1956 for all types of avalanches was used in defining the path length to compute the run-out distance of avalanches that occurred in UzungÖl.
📊
Key Findings & Data:UzungÖl, a village which is located in a valley of North-Eastern Anatolia was chosen as a pilot project area since some fatal snow avalanches occurred in this area in the 1992 winter season.
💡
Conclusion & Impact:Key Words: Voellmy coefficients, Run-out distance, Avalanche dynamic, UzungÖl
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Voellmy coefficients · Run-out distance · Avalanche dynamic

Abstract

In this study, the traditional Voellmy model which has been widely applied since 1956 for all types of avalanches was used in defining the path length to compute the run-out distance of avalanches that occurred in UzungÖl. UzungÖl, a village which is located in a valley of North-Eastern Anatolia was chosen as a pilot project area since some fatal snow avalanches occurred in this area in the 1992 winter season. Due to limited data and field observations, dynamic and turbulence friction coefficients were taken as µ= 0.155 and ξ= 500 m/s2,respectively, for well defined slopes. Although it wasn’t possible to check most of the computed values which need to be measured during an avalanche, the run-out distance was found to be determined quite accurately. A number of the Voellmy coefficients were tested to compute the run-out distance, and the effect of those coefficients on the hydraulic parameters of the avalanche, such as discharge, velocity and depth, was investigated. Key Words: Voellmy coefficients, Run-out distance, Avalanche dynamic, UzungÖl

🔖

Cite This Article

KOÇYİĞİT, Ö., GÜRER, İ. (2010). Effect of the Voellmy Coefficients on Determining Run-out Distance: A Case Study at Uzungöl, Turkey. Gazi University Journal of Science, Cilt: 20 - Sayı: 3, 79–85. https://ajindex.com/articles/255235

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (13)

  1. Margreth, S., “Avalanche Forecasting, Mapping, Zoning and Paravalanche Construction Technologies”, Turkish-French-Swiss Tesearch and Development Project Report 2, General Directorate of Disasters Affairs, Ankara, 22 p., (1994).
  2. Buser, O. and Frutiger, H., “Observed Maximum Run-out Distance of Snow Avalanches and The Determination of The Friction Coefficients µ and ξ”, Journal of Glaciology, 26(94): 121-130 (1980).
  3. Voellmy, A., “Uber die Zerstoerunskraft von Lawinen: Schweizerische Bauzeitung”, Jahrg. 73, No:12, (English translation by R.E. Tate: On the Destructive Force of Avalanche: U.S. Department of Agriculture, Forest Service, Alta Avalanche Study Center Translation No 2, 1964), (1955).
  4. Salm, B. and Gubler, H.U., “Calcul Des Avalanches: Une Methode Didactique Pour le Calcul Pratique”,, Tradiction d’une Publication de Eigdenössichen Institut Für Schnee Und Lawinenforschung, Nr. 47, CEMAGREFNivologie, 26p. (1990).
  5. Salm, B., “Fliessübergange Und Aslaufstrecken von Lawinen”, Interner Bericht des Eidg. Institutes für Schnee und Lawinenforschung, Nr. 566, 45p., (1979).
  6. Bozhinskiy, A.N. and Losev, K.S., “The Fundamentals of Avalanche Science”, Mitteilungen des Eidgenössischen Institutes für Schnee und Lawinenforschung, 55, 280 p. (Translation of “Osnovy Lavinovedeniya”, by C. Bartelt Leningrad, Gidrometeoizdat), (1998).
  7. Kozik, S.M., “Computing Snow Avalanche Motion (in Russian)”, Gidrometeoizdat, Leningrad, 76 p., (1962) Salm,B., “A Short and Personal History of Snow Avalanche Dynamics”, Cold Region Science and Technology, 39: 83-92 (2004).
  8. Barbolini M., Gruber U., Keylock, C.J., Naaim, M. and Savi, F, “Application of Statistical and Hydraulic-continuum Dense-snow Avalanche Models to Five Real European Sites”, Cold Regions Science and Technology, 31:133-149, (2000).
  9. Grigorian, S., Eglit, M. and Yakimov, Y., “A new Formulation and Solution of the Problem of the Motion of Snow Avalanches”, Trudy Vycokogornogo Geofizicheskogo Instituta (in Russian), 12:104-113, (1967).
  10. Perla, R., Cheng, T. and McClung, D., “A Twoparameter Model of Snow Avalanche Motion”, Journal of Glaciology, 26(94): 197-207, (1980).
  11. Brugnot, G. and Pochat, R., “Numerical Simulation Study of Avalanches”, Journal of Glaciology, 27(95): 77-88, (1981).
  12. Maeno, N. and Nishimura, K., “Numerical Computation of Snow Avalanche Motion in a Three-dimensional Topography, Low Temperature Science, 46: 99-110, (1987).
  13. Norem, H., Irgens, F. and Schieldrop, B., “A Continuum Model for Calculating Snow Avalanc