NDLI: GEOMORPHOLOGY. Experimental evidence for hillslope control of landscape scale.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Sweeney, K. E. Roering, J. J. Ellis, C.
Description	Author Affiliation: Sweeney KE ( Department of Geological Sciences, University of Oregon, 1272 University of Oregon, Eugene, OR 97403-1272, USA. kristin.e.sweeney@gmail.com.); Roering JJ ( Department of Geological Sciences, University of Oregon, 1272 University of Oregon, Eugene, OR 97403-1272, USA.); Ellis C ( St. Anthony Falls Laboratory and National Center for Earth-Surface Dynamics, College of Science and Engineering, University of Minnesota, 2 Third Avenue SE, Minneapolis, MN 55414-2125, USA.)
Abstract	Landscape evolution theory suggests that climate sets the scale of landscape dissection by modulating the competition between diffusive processes that sculpt convex hillslopes and advective processes that carve concave valleys. However, the link between the relative dominance of hillslope and valley transport processes and landscape scale is difficult to demonstrate in natural landscapes due to the episodic nature of erosion. Here, we report results from laboratory experiments combining diffusive and advective processes in an eroding landscape. We demonstrate that rainsplash-driven disturbances in our experiments are a robust proxy for hillslope transport, such that increasing hillslope transport efficiency decreases drainage density. Our experimental results demonstrate how the coupling of climate-driven hillslope- and valley-forming processes, such as bioturbation and runoff, dictates the scale of eroding landscapes.
ISSN	00368075
Issue Number	6243
Journal	Science
Volume Number	349
e-ISSN	10959203
Language	English
Publisher	American Association for the Advancement of Science (United States)
Publisher Date	2015-07-03
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Multidisciplinary
Content Type	Text
Resource Type	Article
Subject	History and Philosophy of Science

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