 |
| Titel |
Assessing the application of a laser rangefinder for determining snow depth in inaccessible alpine terrain |
| VerfasserIn |
J. L. Hood, M. Hayashi |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 14, no. 6 ; Nr. 14, no. 6 (2010-06-04), S.901-910 |
| Datensatznummer |
250012331
|
| Publikation (Nr.) |
 copernicus.org/hess-14-901-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| Snow is a major contributor to stream flow in alpine watersheds and
quantifying snow depth and distribution is important for hydrological
research. However, direct measurement of snow in rugged alpine terrain is
often impossible due to avalanche and rock fall hazard. A laser rangefinder
was used to determine the depth of snow in inaccessible areas. Laser
rangefinders use ground based light detection and ranging technology but are
more cost effective than airborne surveys or terrestrial laser scanning
systems and are highly portable. Data were collected within the Opabin
watershed in the Canadian Rockies. Surveys were conducted on one accessible
slope for validation purposes and two inaccessible talus slopes. Laser
distance data was used to generate surface models of slopes when snow
covered and snow-free and snow depth distribution was quantified by
differencing the two surfaces. The results were compared with manually
probed snow depths on the accessible slope. The accuracy of the laser
rangefinder method as compared to probed depths was 0.21 m or 12% of
average snow depth. Results from the two inaccessible talus slopes showed
regions near the top of the slopes with 6–9 m of snow accumulation. These
deep snow accumulation zones result from re-distribution of snow by
avalanches and are hydrologically significant as they persist until late
summer. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|