Title: Soil loss rates due to piping erosion
Authors: VERACHTERT ElsMAETENS WillemVAN DEN EECKHAUT MIETDECKERS JozefPOESEN Jean
Citation: EARTH SURFACE PROCESSES AND LANDFORMS vol. 36 no. 13 p. 1715-1725
Publisher: WILEY-BLACKWELL
Publication Year: 2011
JRC N°: JRC66630
ISSN: 0197-9337
URI: http://onlinelibrary.wiley.com/doi/10.1002/esp.2186/abstract
http://publications.jrc.ec.europa.eu/repository/handle/JRC66630
DOI: 10.1002/esp.2186
Type: Articles in Journals
Abstract: Compared with surface soil erosion by water, subsurface erosion (piping) is generally less studied and harder to quantify. However, wherever piping occurs, it is often a significant or even the main sediment source. In this study, the significance of soil loss due to piping is demonstrated through an estimation of soil volume lost from pipes and pipe collapses (n=560) in 137 parcels under pasture on loess-derived soils in a temperate humid climate (Belgium). Assuming a period of 5 to 10years for pipe collapse to occur, mean soil loss rates of 2.3 and 4.6t ha-1 yr-1 are obtained, which are at least one order of magnitude higher than surface erosion rates (0.01-0.29t ha-1 yr-1) by sheet and rill erosion under a similar land use. The results obtained for the study area in the Flemish Ardennes correspond well to other measurements in temperate environments; they are, however, considerably smaller than soil loss rates due to subsurface erosion in semi-arid environments. Although local slope gradient and drainage area largely control the location of collapsed pipes in the study area, these topographic parameters do not explain differences in eroded volumes by piping. Hence, incorporation of subsurface erosion in erosion models is not straightforward.
JRC Institute:Institute for Environment and Sustainability

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