Ground penetrating radar ice thickness measurements of Dokriani bamak (glacier), Garhwal Himalaya

Ice thickness measurements of Dokriani bamak (glacier) were carried out wit h a ground penetrating radar (GPR) pulse EKKO TV Sensor Software, Canada. T his is the first attempt to estimate the ice thickness of an Indian Himalay an glacier by GPR. Profiling by GPR was carried out at a central frequency of 12.5 MHz with 2 m step size. Three distinct reflection patterns were obs erved; (i) glacier ice (GI), (ii) subglacial lodgment till (SLT) produces c omplex series of reflections; and (iii) bedrock (BR). Crevasses are disting uished by the laterally compressed synclinal hyperbolas stacked one over th e other. The glacier ice thickness measured by GPR ranged from 15 m to 120 m. Ice thickness calculated theoretically and by GPR were very close. The c omputed total volume of glacier ice was 283.6 x 10(6) m(3).