کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4676567 1634500 2008 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On avalanche measurements at the Norwegian full-scale test-site Ryggfonn
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
On avalanche measurements at the Norwegian full-scale test-site Ryggfonn
چکیده انگلیسی

Avalanche measurements and observations, which were carried out at the Ryggfonn test-site, Norway, on 16 April 2005, are analyzed. The data include pulsed Doppler radar measurements, impact pressure readings from load cells mounted at two locations within the track and stress readings from load plates flush with the upstream slope of a catching dam. The radar measurements are used to deduce velocities and estimates on the retarding accelerations. The retarding accelerations show a wide discrepancy with commonly used model assumptions. Pressure measurements were correlated with velocity measurements. The measurements infer that commonly used drag factors are not sufficient to describe the forces exerted by slow moving wet snow. These measurements also depict transitions in the flow behavior. Measurements with load plates imply plastic failure rather than Coulomb-type friction. Field observations of the avalanche track suggest that erosion/abrasion due to (saltating) particles is one possible entrainment mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cold Regions Science and Technology - Volume 51, Issues 2–3, February 2008, Pages 138–155
نویسندگان
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