Item: Detection and registration of water waves in a natural snow cover
Title: Detection and registration of water waves in a natural snow cover
Proceedings: Proceedings of the 1992 International Snow Science Workshop, Breckenridge, Colorado, USA
Authors: A. Denoth
Abstract: Based on multiple years experience with long-term water percolation measurements made on columns of repacked snow, dielectric sensors have been developed to automatically record the local water content at various depths. Recent long-term measurements of timely and spatial variations in snow wetness are reported. The experiments have been carried out in the Stubai Alps, 3000 m a.s.l, and at the Seegrube, 2000 m a.s.l., near Innsbruck, Austria. The field experiments have been made using simultaneously operated dielectric probes, installed at different depths in a natural snow cover. Percolating melt- and rainwater waves have been detected. At higher water flow rates produce a by a short but heavy rainfall on a relatively wet snow cover - the formation and movement of water shock fronts has been observed. In addition, the distribution and daily variation of wetness in the uppermost layers of a natural snow cover have been recorded with a high spatial resolution: 4 sensors have been installed with a vertical spacing of only 10 cm, and with a horizontal displacement of 20 cm.
Keywords: sensors, wetness, rainfall, snow cover
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