Monday, 22 May 2000

Opening of Symposium: Ferdinand Eberle, Vice-Governor, Province of Tyrol

0920-1020 h Chair: Robert A. Bindschadler

Session 1: Snow Cover

T Baunach, C. Fierz, P. K. Satyawali and M. Schneebeli: A model for kinetic grain growth

P. M. B. Fohn: Simulation of surface-hoar layers for snow-cover models

E. Guseva-Lozinski: Modelling snow crystal transformations within snow-cover and frozen soil as a result of surface crystal variations

1050-1230 h Chair: Sergey Sokratov

Session 2: Snow Cover

P. Etchevers, Y. Durand, F. Habets, E. Martin andj. Noilhan: Impact of spatial resolution on the hydrological simulation of the Durance high-Alpine catchment, France

Y. Durand, G. Guyomarc'h and L. Merindol: Numerical experiments of wind transport over a mountainous instrumented site: I. Regional scale

J.-L. Michaux, F. Naaim-Bouvet and M. Naaim: Drifting-snow studies over an instrumented mountainous site: II. Measurements and numerical model at small scale

Wei Wenshou, Qin Dahe and Liu Mingzhe: Properties and structure of the seasonal snow cover in the continental regions of China

H. H. Christiansen: Snow-cover depth, distribution and duration data from northeast Greenland obtained by continuous automatic digital photographing

1400-1520 h Chair: Rand Decker

Session 3: Modelling Snow Cover

S. A. Sokratov and A. Sato: The effect of wind on the snow cover

P. Bartelt and M. von Moos: Small strain, low strain-rate, microstructure-based snow viscosity and elasticity laws

O. Abe: Creep experiments and numerical simulations of very light artificial snowpacks

K. Kleemayr and S. Wieshofer: Two and three dimensional approach of snow-cover modelling

1550-1730 h Chair: Perry Bartelt

Session 4: Avalanche Control

A. Jonsson and E. Hestnes: The proposed open-pit protection of Bolungarvik, Iceland

G. P. Giani, S. Silvano and G. Zanon: Avalanche of 18 January 1997 on Brenva Glacier, Mont Blanc Group, Western Italian Alps: an unusual process of formation

R. Decker, R. Patterson, G. Merrill, R. Rice and L.T. Wells: Adapting Kolktalfeln for avalanche hazard reduction at the Milepost 151 avalanche, Jackson, Wyoming

N. Jensen, R. Decker and D. Howlett: Full scale measurements and analysis of snow avalanche velocities

F. Louchet: A transition in dry-now slab avalanche triggering modes

Tuesday, 23 May 2000

0840-1020 h Chair: Jiirg Schweizer

Session 5: Hazard Mapping

V. P. Blagoveshchenskiy and M. E. Eglit: Avalanche hazard mapping with the use of mathematical models

U. Gruber and S. Margreth: Winter 1999: a valuable test of the avalanche-hazard mapping procedure in Switzerland

M. Barbolini and F. Savi: Estimate of uncertainties in avalanche hazard mapping

G. Harbitz, A. Harbitz and F. Nadim: On probability analysis in snow avalanche hazard zoning

R. Rice, R. Decker, N. Jensen, R. Patterson, S. Singer, G Sullivan and L. Wells: Avalanche hazard reduction for transportation corridors using real-time detection and alarms

1050-1230 h Chair: Yasuaki Nohguchi

Session 6: Avalanche Dynamics

E. Surifiach, G. Furdada, F. Sabot, B. Biescas and J. M. Vilaplana: On the characterization of seismic signals generated by snow avalanches for monitoring purposes

B. Sovilla, F. Sommavilla and A. Tomaselli: Measurements of mass balance in dense snow avalanche events

M. Schaer and D. Issler: Particle densities, velocities and size distributions in large avalanches from impact-sensor measurements

T. Nagasaki, K. Izumi, S. Kobayashi andT. Yamada: Prediction of avalanche paths deviated from the stream by centre-ofmass model

Y. C Tai, S. Noelle, J. M. N.T. Gray and K. Hutter: An accurate shock-capturing finite-difference method to solve the Savage—Hutter equations in avalanche dynamics

1400-1730 h Chair: Kolumban Hutter

Session 7: Posters

N. Maeda, S. Kobayashi, K. Izumi, S. Kohno and M. Amenomori: Prediction of rainfall and snowfall by a neural network method

B. Kohl, M. Fuchs, G. Markart and G. Patzelt: Heavy rain on snow cover

M. Ishizaka: An evaluation of precipitation efficiency of densely rimed snowflakes in falling snow particles

A. Hachikubo: Numerical modelling of sublimation on snow and comparison with field measurements

I. Takei and N. Maeno: The low-frequency conductivity of snow near the melting temperature

C Pielmeier, M. Schneebeli andT. Stucki: Snow texture: a comparison of empirical versus simulated texture index for Alpine snow

Y Nohguchi and K. Kawashima: Self-organized dirt slope by snowmelt

M. Schneebeli and G Kriisi: Three-dimensional reconstruction of snow using serial sections

D. Daudon, E. Flavigny and D. Peyrede: Away of studying snow-slab stability by numerical modelling

A. Mishra, L. Singh, D. N. Sethi and B. R. Kaushik: A uniaxial constitutive law based on delayed elasticity accounting for grain size effect and multi-step loading

R. Bintanja, H. Lilienthal and H. Tug: Observations of snowdrift over Antarctic snow and blue-ice surfaces

Y Takeuchi, S. Kobayashi, T Sato, K. Izumi, K. Kosugi, Wang Xin, Zhang Jiapin and Peng Yongheng: The effect of wind direction on drift control by snow fences

D. Font, T Sato, K. Kosugi, A. Sato andj. M. Vilaplana: Mass-flux measurements in a cold wind tunnel: comparison of the mechanical traps with a snow-particle counter

D. Font, G. Furdada andJ.M. Vilaplana: Aeolian susceptibility maps: methodology and applications

C. Jaedicke and T Thiis: Acoustic snowdrift measurements: experiences and results from the FLOWCAPT instrument

D. Marks, T. Link, A. Winstral and D. Garen: Simulating snowmelt processes during rain-on-snow over a semi-arid mountain basin

P.-E. Mellander and K. Bishop: Snow cover, soil frost and spring water stress on a plot scale manipulation in a young Scots pine stand

S. Ikeda, R. Nitta and K. Sekino: The fir trees surviving surface avalanches

H. Schaffhauser, P. Sampl and R. Sailer: Simulation of Galtiir avalanche 1999: 2D and 3D coupled simulation with SAMOS

J. McElwaine and K. Nishimura: Ping-pong ball avalanche experiments

J. Marturia, P. Oiler, A. de Paz and G. Marti: Automatic avalanche mapping for large areas

G. Volk and K. Kleemayr: Application of a 2D model on several well-documented events of Feb. 1999 in Austria

E. Martin, G. Giraud, Y Lejeune and G. Boudart: Impact of a climate change on avalanche hazard

M. Christen, P. Bartelt, U. Gruber and D. Issler: AVAL-ID: an avalanche dynamics program for the practice

Y C. Tai, J. M. N.T. Gray, K. Hutter and S. Noelle: Flow of dense avalanches past obstructions

R. Sailer, F. Daschek, P. Sampl and H. Schaffhauser: The sensitivity of SAMOS (Snow Avalanche Modelling and Simulation) to changes in the resolution of DEMs

M. N. Petrooshina: Landscape structure as an indicator of avalanche activity

Y Nohguchi and H. Ozawa: Similarity on the shape of granular avalanches

A. N. Bozhinsky, A. N. Nazarov and P. A. Chernouss: Avalanches: a probabilistic approach to modelling

N. Mihnevski andT Andreeva: Heightened risk of avalanches and atmospheric circulation in Bulgarian mountains

Y. Sventek, T. Glazovskaya, Y. Seliverstov, A. Soloviev, Yu. Soloviev and A. Suchilin: Mapping of territories prone to avalanches and slushflows in the GIS Khibiny project

E. Troshkina, T. Glazovskaya, N. Kondakova and V. Sokolov: Zoning of snowiness and avalanching in the mountains of westernTranscaucasia

K. Kleemayr and A. Moser: Regional avalanche prediction in Austria

D. Issler, U. Gruber and N. M. Dawes: Doppler radar and video measurements of avalanche velocities at the Vallee de la Sionne test site

P. Baumgartner: Avalanche events February 1999

P. Ferrer, G. Furdada andj. M. Vilaplana: Snow avalanche cadastre organisation in Andorra, central Pyrenees

K. Kawashima,T. Endo, S. Iikura,T. Fujii and S. Kobayashi: Observation of heterogeneous structure of snow cover in melt season

T. Nagler and H. Rott: Synergistic use of synthetic aperture radar and optical satellite images for monitoring the Alpine snow cover

S. Marshall, R. J. Oglesby and A.W. Nolin: Effect of western U.S. snow cover on climate

A. Gagnati, M. Valt, R. Gasacchia, F. Lauta and R. Salvatori: Radiometric investigation on different snow covers at

Ny-Alesund (Svalbard) and at Terra Nova Bay (Antarctica)

V. Sapunov, G. G. Sapunov, T. Glazovskaya and Y. Seliverstov: Landscape differentiation in distribution of snow cover in Subarctic mountains (Khibina mountains)

G. Genthon, M. Fily and E. Martin: Numerical simulations of Greenland snowpack and comparison with passive microwave spectral signatures

M. Shimizu and O. Abe: Recent fluctuation of snow cover on mountainous areas injapan

Wednesday, 24 May 2000

0840-1020 h Chair: Yih-ChinTai

Session 8: Avalanche Dynamics

H. Schreiber, W. L. Randeu, H. Schaffhauser and L. Rammer: Avalanche dynamics measurement by pulsed Doppler radar

S. H. Haraldsdottir, H. Olafsson, Y Durand, L. Merindol and G. Giraud: SAFRAN-Crocus snow simulations in an unstable and windy climate

M. Clement-Rastello: A study on the size of snow particles in powder-snow avalanches

M. A. Kern, L. Vulliet and W. J. Ammann: Inverse grading as function principle of the avalanche airbag

J. Schweizer and G. Gamponovo: The skier's zone of influence in triggering slab avalanches

1050-1230 h Chair: Richard Bintanja

Session 9: Snow Cover

M. Stahli, A. Papritz, P. Waldner and F. Forster: Time—space linear regression analysis of the snow cover in a pre-Alpine semiforested catchment

M. J. Tribbeck, R. J. Gurney, E. M. Morris and D. Pearson: Modelling the influence of vegetation on the seasonal snowcover

B. Brabec and R. Meister: A nearest-neighbor model for regional avalanche forecasting

K.W. Birkeland, C.J. Mock andJ.J. Shinker: Avalanche extremes and atmospheric circulation patterns

J. Vallet, U. Gruber and F. Dufour: Photogrammetric avalanche volume measurements at Vallee de la Sionne, Switzerland

Thursday, 25 May 2000

0840-1020 h Chair: Paul M. B. Fohn

Session 10: Snow Drifting

R. Bintanja: Buoyancy effects induced by drifting snow particles

J. Doorschot, N. Raderschall and M. Lehning: Measurements and one-dimensional model calculations of snow transport over a mountain ridge

J. McElwaine: Saltation modelling

M. Lehning, N. Raderschall andj. Doorschot: Preferential deposition of snow precipitation: the most important process in Alpine snow drift?

F. Naaim-Bouvet, M. Naaim andJ.-C. Francais: Integration of wind and drifting snow numerical models in GIS snowdrift risk on roads: a tool for engineering

1050-1230 h Chair: David M. McGlung

Session 11: Snow Drifting and Snow Pack

T. Sato, K. Kosugi and A. Sato: Saltation-layer structure of drifting snow observed in wind tunnel

K. Kosugi, T. Sato, A. Sato, K. Sugiura, K. Nishimura and N. Maeno: Saltation lengths of drifting snow particles over hard snow surfaces

D. Issler, M. Schaer, M. Clement-Rastello and F. Rapin: Comparison of three powder-snow avalanche models of different complexity

L. Vidal and M. Naaim: Physical modeling of snowpack stability topography influence and weak layer behaviours

P. A. Chernouss and Yu. Fedorenko: Application of statistical simulation for avalanche-risk evaluation

1400-1520 h Chair: Horst Schaffhauser

Session 12: Forests and Snow

D. M. McClung: Characteristics of terrain, snow supply and forest cover for avalanche initiation caused by logging

P. Bartelt and V. Stockli: The influence of tree and branch fracture, overturning and debris entrainment on snow avalanche flow

P. Holler: The influence of the forest on night-time snow surface temperature

Elena Guseva-Lozinski: Modelling snow-cover parameters in mountain forest-covered area 1550-1730 h CHAIR: Dieter Issler

Session 13: Slushflows and Snow

J. Jenik, M. Kocianova, V. Spusta and T Frantik: Avalanche activity and vegetation of the High Sudetes

D. Scherer, L. Groebke and E. Parlow: Photogrammetric analysis of a slush torrent in the Karkevagge, northern Sweden

T Sidorova, N. Belaya and V. Perov: Distribution of slush flows in northern Europe and their potential change due to global warming

T Johannesson: Run-up of two avalanches on the deflecting dams at Flateyri, northwestern Iceland

Friday, 26 May 2000

0840-1020 h Chair: Hansueli Gubler

Session 14: Snow Properties

B. Jamieson and C. D. Johnston: Evaluation of the shear frame test for weak snowpack layers

W. L. Randeu, M. Schonhuber, P. Vaxevanakis and H. Schreiber: Detailed point-monitoring of snowfall properties and finestructure by 2D-video-distrometer

C. Camponovo andj. Schweizer: Rheological measurements of the viscoelastic properties of snow

W.L. Randeu and H. Schreiber: Radar tools for reliable avalanche detection and winter road signalling and protection

C. Rixen and V. Stockli: Vegetation and soil under artificial snow

1050-1210 h Chair: Kolumban Hutter

Session 15: Snow Properties

C. Coleou, B. Lesaffre, J.-B. Brzoska, W. Ludwig and E. Boiler: Three-dimensional snow images by X-ray microtomography

S. A. Sokratov, A. Sato and Y. Kamata: Water vapor in the pore space of snow

V. N. Golubev and A. D. Frolov: On the correlation between tensile strength and stress wave velocities of dry coherent snow based on its structural model

A. Sato and Y Kamata: Observation of the depth hoar growth by a time lapse motion picture