Ryggfonn - Options for reconstruction of the test site. Deliverable of the NFR-Snow research programme SIP-6

Abstract

Norges Forskningsråd (NFR)

Options for reconstructing NGI's full-scale avalanche test site at Ryggfonn are discussed for different assumed levels of funding. If full funding can be obtained, it is recommended that the proposal for the equipment of a European avalanche test site as elaborated by the SAME project be realized. For lower funding levels, the optimum equipment depends strongly on the specific avalanche-dynamics problems that the experiments shall address. The choice of those questions depends in turn on the practical problems for which tools are to be developed. A pressure-sensor based, inexpensive method for measuring density and velocity inside a powder-snow avalanche is suggested, and the quantities to be measured for investigating avalanche impact on the dam are derived. Only general concepts are presented at this stage, and substantiall more detailed feasibility studies will be needed before decisions are made.