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Perennial névés and the hydrology of rock glaciers
Author(s) -
Tenthorey Geneviève
Publication year - 1992
Publication title -
permafrost and periglacial processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.867
H-Index - 76
eISSN - 1099-1530
pISSN - 1045-6740
DOI - 10.1002/ppp.3430030313
Subject(s) - geology , rock glacier , permafrost , hydrology (agriculture) , glacier , geomorphology , geotechnical engineering , oceanography
From 1986 to 1990 water tracing was carried out in three rock glaciers in the Upper Val de Réchy. Results indicate different patterns of circulation depending on the size and degree of activity of the rock glaciers. Two rock glaciers show rapid superficial flow and one has slow interstitial flow. This is analogous to supra‐ and subglacial flow. Intra‐flow is also seen in one rock glacier. The importance of perennial névés at the roots of rock glaciers is demonstrated. Meltwater supplies the risings and, by refreezing, probably also increases the ice mass of the rock glaciers.