I n s t r u m e n t s

a n d

M e t h o d s

The mud flow alarmstationhas sofarturned on the
alarminonecasewhereseveralhundredm³ofgravel
finally blocked the road.

CONCLUSIONS

Remote measurements close to andwithin release zones
significantly improve local avalanchewarning andprotec-
tion.Remote stations located in places that represent the
developmentofthesnowcoverwithinaregionhelp to
improve regional avalancheforecast. Alarm systems allow
to reduce the risk ofavalanche accidents on traffic lines.
Remote GAZ-EX control combined with measurements of
snow accumulation, fracture height etc. within the release
zone improve the availability and reliability of the method
ofartificialavalancherelease.Standardizedelectronics,
instrumenttowersandsoftwareagainincrease system
reliability and decrease maintenance costs.

REFERENCES

Bolognesi (R.), 1994 - Local avalanche forecasting in Switzer-
land:Strategyandtools.TobepublishedinProceedingsof
ISSW1994, ALTA,USA.

Gubler(H.), Hiller(M.), Weilenmann(P.),1988- Remote on-
linesnowcoverprofilinginavalanchereleasezonesusing
microwaveradar,Proceedings of the International SnowSci-
ence Workshop, Whistler, Canada, pp. 166-174.

Gubler(H.), Hiller (M.), Weilenmann(P.), 1991- New Instru-
ments and their possible use in avalanche warning,Proceed-
ings of Symposium de Chamonix 1991,pp.83-91, ANENA, 15
rue Ernest Calvat 38000GrenobleFrance.

Gubler(H.), 1992- Slabavalancheformation,new measure-
mentsandresults,ProceedingsoftheInternationalSnow
ScienceWorkshop,Breckenridge,ColoradoU.S.A.,pp.134-
149.

136