EGU General Assembly 2008
Session Programme Meeting Programme Personal Programme Search
 
Quick Search
Geomorphology
General Sessions
Landscape Dynamics
Glacial/Periglacial Sessions
Weathering and Mass Wasting
Rivers/Fluvial Processes
Coastal and Marine Sessions
Aeolian Sessions
Man and Landscape
Programme Groups
Union Symposia
Interdivision Sessions
Educational Symposia
Atmospheric Sciences
Biogeosciences
Climate: Past, Present, Future
Cryospheric Sciences
Earth & Space Science Informatics
Energy, Resources & the Environment
Geochemistry, Mineralogy, Petrology & Volcanology
Geodesy
Geodynamics
Geomorphology
Geosciences Instrumentation & Data Systems
Hydrological Sciences
Isotopes in Geosciences: Instrumentation and Applications
Magnetism, Palaeomagnetism, Rock Physics & Geomaterials
Natural Hazards
Nonlinear Processes in Geophysics
Ocean Sciences
Planetary & Solar System Sciences
Seismology
Soil System Sciences
Solar-Terrestrial Sciences
Stratigraphy, Sedimentology & Palaeontology
Tectonics & Structural Geology
Medal Lectures
Great Debates in Geosciences
Short Courses
Keynote Lectures
Townhall Meetings
Division Business Meetings
Editorial Board Meetings
Union Meetings
Splinter Meetings
  Information - GM4.2 Soil erosion as a geomorphological process (co-listed in HS)

Event Information
Soil erosion has been widely studied as an agronomic problem, and as a major constituent of desertification, but has received less attention from geomorphologists, even though identified as one of the most significant erosional processes in many environments. Improved understanding of the detailed processes of runoff generation and sediment transport, and their interaction with vegetation cover, has now reached the stage where there is a good prospect of formally scaling up in time and space to the implications for the long-term evolution of soils and landscapes. Furthermore, spatially explicit datasets on controlling factors (topography, lithology, soils, climate) necessary to apply such approaches are now available on a continental and even global scale.

At present the theory of runoff generation in soil erosion models is based on the Richardsí equation or on the use of infiltration equations. Most experimental studies are for infiltrometer plots or small sub-catchments, providing a growing awareness of the issues of non-uniform production and a general decline in runoff with increasing catchment area, due to factors such as imperfect connectivity and short, localised bursts of intense rainfall. Vegetation plays a key role in creating and maintaining connectivity. Similarly for sediment transport, the strong non-linearity of the process makes forecasting very sensitive to micro-topography, and there is no current theory that examines the dynamic interaction between the details of form and process so that application of current models at the landscape scale remains problematic. As well as the issues of spatial up-scaling, there are comparable issues for up-scaling in time from the finest scales of rainfall measurement to the much coarser data that is widely available, both for current rainfall in many areas, and for forecasts from GCMs for future climate change.

Considering the lack of formal, theoretical approaches to upscaling it is not surprising that current landscape evolution models necessarily generalise these processes in terms of catchment area and gradient. As a consequence, such models are not fully informed by the current developments in soil erosion research. We invite contributions that can begin to mine this rich area, exploring experimental and theoretical approaches that can use the experiences of soil erosion research to improve our understanding of landscape and soil evolution.

Preliminary List of Solicited Speakers

Co-Sponsorship

General Statement
The information contained hereafter has been compiled and uploaded by the Session Organizers via the "Organizer Session Form". The Session Organizers have therefore the sole responsibility that this information is true and accurate at the date of publication, and the conference organizer cannot accept any legal responsibility for any errors or omissions that may be made, and he makes no warranty, expressed or implied, with regard to the material published.



Back to Session Programme

 
 
 
 


©2002-2008 Copernicus Systems + Technology GmbH