Information - SSS14 Improving spatial predictions of soil erosion (co-listed in HS & GM)
Much current work seeks to predict sediment yield at catchment outlets, for both applied and scientific objectives without any true consideration of the accuracy of spatial predictions within catchments. The problem of ‘spatial equifinality’ in soil erosion modelling, where numerous predicted patterns of soil erosion could all lead to the same sediment yield prediction at the catchment outlet, is rarely considered, despite the obvious need to evaluate catchment (or even hillslope) scale models in a spatial manner.
This session will focus on three key areas where progress needs to be made in order to move on from the existing (and often misleading) application of soil erosion models at catchment scales. These areas are; (1) field observations of spatial variability in soil erosion rates within catchments/hillslopes, including tracing experiments to describe patterns and spatial distribution of erosion and deposition, (2) laboratory experiments to refine understanding of spatial variability of erosion at small scales and (3) numerical modelling in a spatially explicit fashion with evaluation against spatial datasets (both qualitative and quantitative) describing patterns of soil erosion.
The session will promote discourse between modellers, field scientists and laboratory scientists to improve spatial soil erosion predictions and the representation and evaluation of spatial variability at a range of scales from the plot to catchment/watershed and landscape scale.
Preliminary List of Solicited Speakers
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