Author(s): I. Mayer; O. Starosolszky
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Keywords: No Keywords
Abstract: Problems of the traditional measurement of ice thickness on rivers and lakes may cause inaccurate estimation of ice cover characteristics, including surface roughness of ice bottom. The subsurface radar may increase the accuracy by continuous profiling of ice cover in cross-sections and longitudinal profiles. The principle of the instrument is the reflections of the electromagnetic pulses from interfaces of different materials. Subsurface radar was used under different conditions and two applications for the measurement of ice jams on Hungarian rivers are introduced. Reproducibility of the measurement was studied on a lake and from several profiles a quite satisfactory data could be derived, the values are within 1 cm range. It is therefore suggested that instrument can be applied when electromagnetic constant of ice and water can be determined by local testing by manual measurement through one borehole drilled in the ice. The constant depends on the structure of the ice and rather variable in ice jams.
Year: 1984