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The Semois valley in southern Ardenne: short-wavelength, large-Amplitude meanders incised into a slaty basement
Petit, François; Hallot, Eric; Houbrechts, Geoffrey
2018In Landscapes and landforms of Belgium and Luxembourg
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Keywords :
Entrenched meanders; Strahler Theory; Slaty cleavage; Elongated meanders; River erosion
Abstract :
[en] The incised meanders of the Semois Valley, in Southern Ardenne, are remarkably elongated, forming a nearly 100-km-long meander belt. Their elongation is conditioned by the relative orientation of the meander loops and the regional slaty cleavage, as theorized by Strahler. These meanders already existed in the Early Quaternary, some cut-off meanders lying more than 100 m above the present floodplain. Although the Quaternary incision rates of the Semois were low ( 0.05 mm/year), several meanders look more entrenched than ingrown, probably because lateral erosion was fairly slow (*0.3–0.5 mm/year), owing to the large quantity of material to evacuate by a rather small river. The combined aesthetic and scientific interests of this particularly well-developed meander belt speak in favour of the preservation of the nicest meanders as geomorphosites.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Petit, François  ;  Université de Liège - ULiège > Département de géographie > Département de géographie
Hallot, Eric ;  Université de Liège - ULiège > Département de géographie > Département de géographie
Houbrechts, Geoffrey  ;  Université de Liège - ULiège > Département de géographie > Département de géographie
Language :
English
Title :
The Semois valley in southern Ardenne: short-wavelength, large-Amplitude meanders incised into a slaty basement
Publication date :
2018
Main work title :
Landscapes and landforms of Belgium and Luxembourg
Publisher :
Springer
ISBN/EAN :
9783319582375
Collection name :
World Geomorphological Landscapes
Pages :
385-394
Peer reviewed :
Peer reviewed
Available on ORBi :
since 30 April 2018

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