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Götz, Joachim ; Weidinger, Johannes Thomas ; Kraxberger, Stefan ; Hennecke, Anne-Lise ; Buckel, Johannes ; Adhikari, Basanta Raj:
Geomorphologic and Hydrogeologic Characteristics of Populated Rockslide Deposits (Sagarmatha National Park, Khumbu Himal, Nepal).
In: Journal of Water Resource and Protection.
Bd. 7
(2015)
Heft 13
.
- S. 1038-1048.
ISSN 1945-3108
DOI: https://doi.org/10.4236/jwarp.2015.713085
Abstract
Surface morphology and internal composition of large rockslide deposits have been frequently studied, but their hydrogeologic conditions and consequences for (drinking) water quality and quantity on such deposits are largely unknown. In this study we provide first information on this critical relationship for two large rockslide deposits in the Khumbu Himal (Nepal), which are at the same time the main settlement areas in the region. In the first step, we investigated the Lukla and the Namche-Khumjung rockslides with respect to their dimensions and internal composition based on orthophotos and digital elevation models, geomorphologic field mapping, and the analysis of rockslide outcrops. Secondly, we studied their hydrogeologic characteristics by means of spring water mapping, sampling and analyses. As a consequence of the fragmented and highly shattered rockslide material, both deposits are characterized by 1) effective infiltration, 2) short residence times of percolating water and 3) by only small amounts of available spring water and surface runoff at all. Human activity on the studied rockslide deposits can therefore be described as an ambivalent relationship: On the one hand, the rockslide deposits provide a gentle topography and the only available areas for extensive settlements and agriculture in the steep upper DudhKosi catchment; On the other hand, their internal composition accounts for water scarcity---a critical issue for the local population demanding for adaptation strategies, especially in the light of the ever---increasing trekking and expedition tourism in the region.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | Geomorphologic and hydrogeologic mapping; Khumbu Himal; Rockslide hydrology; Rockslide morphology; Water scarcity |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Geomorphologie Fakultäten |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie 900 Geschichte und Geografie > 910 Geografie, Reisen |
| Eingestellt am: | 03 Apr 2019 08:34 |
| Letzte Änderung: | 03 Apr 2019 08:34 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/48531 |