Length-scale dependence of relief along the south eastern border of Massif Central (France)

Details Length-scale dependence of relief along the south eastern border of Massif Central (France) Length-scale dependence of relief along the south eastern border of Massif Central (France)

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.1823l&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 14, p. 1823-1826

Mathematics

Logic

4

Hydrology: Geomorphology

Scientific paper

Relief has been calculated over four orders of length-scales (75 m to 800 km) for several drainage basins along the south-eastern border of Massif Central, an asymmetric plateau edge feature. Relief is not uniform over the length-scale domain, but rather appears as smooth at small and large scales, and rough at meso-scale. This heterogeneous behavior is interpreted as a consequence of the different processes that shape topography at such ranges of scales. The threshold between small and meso scales is rather well constrained for all basins (400-500 m), and may represent the limit where channel networks appear, while the threshold between meso-scale and large scale varies with geological context: where relief is fault controlled (Mediterranean drainage basins), the threshold value is of the order of 15-20 km. Where topography is flexurally controlled (Atlantic drainage basins), the threshold value is different (40-80 km).

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