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| Reference : Morphometric dating of the fluvial landscape response to a tectonic perturbation |
| Scientific journals : Article | |||
| Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography | |||
| http://hdl.handle.net/2268/130688 | |||
| Morphometric dating of the fluvial landscape response to a tectonic perturbation | |
| English | |
Demoulin, Alain  [Université de Liège - ULg > Département de géographie > Unité de géographie physique et quaternaire (UGPQ) >] | |
| 2012 | |
| Geophysical Research Letters | |
| American Geophysical Union | |
| 39 | |
| L15402 | |
| International | |
| 0094-8276 | |
| 0094-8276 | |
| Washington | |
| DC | |
| [en] geomorphometry ; tectonic uplift ; uplift dating ; landscape evolution ; river incision | |
| [en] Despite constant progress in numerical and field studies
of landscape evolution, time evolution is still poorly constrained in many uplifted areas where low denudation rates prevent the use of low temperature thermochronology, especially outside high relief mountainous areas. Here, I show that regional statistics of the landscape metric R involving hypsometric integrals at three nested levels of a catchment are able to isolate the time effect on landscape geometry during the latter’s transient response to a tectonic perturbation. Analysis of 210 catchments from 9 regions of known uplift age worldwide shows that the regionally characteristic, R-derived SR index is in inverse power law relation with the time elapsed since a base level lowering. Suggesting a response time of 5 My, this finding has important implications for quantifying the rate of landform evolution and determining whether a landscape has reached steady-state form. | |
| Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS | |
| Researchers ; Students | |
| http://hdl.handle.net/2268/130688 |
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