Periglacial Geomorphology by Abrahams Athol D.;Dixon John C.;

Author:Abrahams, Athol D.;Dixon, John C.; [Abrahams, John C. Dixon and Athol D.]
Language: eng
Format: epub
Publisher: Taylor & Francis Group
Published: 2020-03-21T00:00:00+00:00

Table 7.2. Yearly Potential Runoff Volumes from Slopes Adjacent to the Three Selected Rock Glaciers

Rock Glacier Catchment Area (m2) Volume of Water (liters)

California 9.25 × 105 3.57 × 108

Lost Lake 1.62 × 105 6.09 × 107

Dutch Creek 3.94 × 105 1.48 × 108

Actual discharges of the streams issuing from the rock glaciers were measured hourly from 0600 to 1800 hours. Sampling was conducted during periods with overcast skies, clear skies, and rainstorms in an effort to understand how discharge responds to input. Stream discharge values were estimated utilizing channel cross-sections and stream velocity measurements (Gregory and Walling, 1973). Local rock was used to construct weirs. Channel profiles at the sampling sites were surveyed and velocity measurements were obtained with a current meter. Because the volume of the water in the stream issuing from the frontal slope of the Lost Lake Rock Glacier was less than the minimum level required for use of the current meter, velocity was estimated by timing the movement of a cork. The discharge data are shown in Figure 7.8.

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