The illusion of diffusion: Field evidence for depth-dependent sediment transportстатья из журнала
Аннотация: Research Article| December 01, 2005 The illusion of diffusion: Field evidence for depth-dependent sediment transport Arjun M. Heimsath; Arjun M. Heimsath 1Department of Earth Sciences, Dartmouth College, Hanover, New Hampshire 03755, USA Search for other works by this author on: GSW Google Scholar David Jon Furbish; David Jon Furbish 2Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee 37235, USA Search for other works by this author on: GSW Google Scholar William E. Dietrich William E. Dietrich 3Department of Earth and Planetary Sciences, University of California, Berkeley, California 94720, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Arjun M. Heimsath 1Department of Earth Sciences, Dartmouth College, Hanover, New Hampshire 03755, USA David Jon Furbish 2Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee 37235, USA William E. Dietrich 3Department of Earth and Planetary Sciences, University of California, Berkeley, California 94720, USA Publisher: Geological Society of America Received: 18 May 2005 Revision Received: 12 Aug 2005 Accepted: 15 Aug 2005 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2005) 33 (12): 949–952. https://doi.org/10.1130/G21868.1 Article history Received: 18 May 2005 Revision Received: 12 Aug 2005 Accepted: 15 Aug 2005 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Arjun M. Heimsath, David Jon Furbish, William E. Dietrich; The illusion of diffusion: Field evidence for depth-dependent sediment transport. Geology 2005;; 33 (12): 949–952. doi: https://doi.org/10.1130/G21868.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Soil-covered upland landscapes are common in much of the habitable world, and our understanding of their evolution as a function of different climatic, tectonic, and geologic regimes is important across a wide range of disciplines. Erosion laws direct quantitative study of the processes shaping Earth's surface and form the basis of landscape evolution modeling, but are based on limited field data. Here we use in situ–produced cosmogenic 10Be and 26Al concentrations from granitic saprolite to quantify an exponential decline in soil production with increasing soil thickness for a new field site in Point Reyes, California. Results are similar to soil production functions from two different, previously studied field sites, and are used with extensive measurements of soil thickness to quantify depth-integrated sediment transport flux. Plots of calculated sediment fluxes against the product of soil depth and hillslope gradient provide the first field-based evidence that soil transport is a nonlinear, depth-dependent function. Data from all sites suggest that the widely used linear diffusion equation is only appropriate for shallow gradient, convex-up regions, while the depth-dependent transport law is more broadly applicable. Quantifying both the mobile soil thickness and landscape morphology is therefore critical to understanding how landscapes evolve. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Год издания: 2005
Авторы: Arjun M. Heimsath, David Jon Furbish, W. E. Dietrich
Издательство: Geological Society of America
Источник: Geology
Ключевые слова: Geology and Paleoclimatology Research, Soil erosion and sediment transport, Landslides and related hazards
Открытый доступ: closed
Том: 33
Выпуск: 12
Страницы: 949–949