000153138 001__ 153138
000153138 005__ 20190316234908.0
000153138 0247_ $$2doi$$a10.1016/j.jhydrol.2010.10.021
000153138 02470 $$2ISI$$a000285122000011
000153138 037__ $$aARTICLE
000153138 245__ $$aEffect of raindrop splash and transversal width on soil erosion: Laboratory flume experiments and analysis with the Hairsine-Rose model
000153138 269__ $$a2010
000153138 260__ $$c2010
000153138 336__ $$aJournal Articles
000153138 520__ $$aThe parameter consistency of the one-dimensional Hairsine-Rose (H-R) erosion model under conditions of significant rainfall splash was examined. To account for the splash characteristic length scale and its interaction with the transverse erosion width, experiments were carried out using erosion flumes of the same length (6 m), but different widths, with sediment concentrations measured at the flume exits. Total sediment concentration and the concentration of seven size fractions (< 2, 2-20, 20-50, 50-100, 100-315, 315-1000 and > 1000 µm) were measured at high rainfall intensity (60 mm/h) and with a gentle slope (2.2%). The conditions employed ensured that erosion was predominantly precipitation-driven. The experimental results showed that raindrop splash affected particularly the sediment breakthrough from the wider flumes (flumes 1 and 2, 1- and 0.5-m wide, respectively). However, the raindrop splash effect was less significant in observed sediment concentrations from the narrower flumes (flumes 3 and 4, both 0.25-m wide). For these flumes, the detached sediment was affected by the transversal width of the flume in that an amount of detached sediment adhered to the barriers instead of being removed in the overland flow. The one-dimensional H-R model was fitted to the experimental results and good agreement was found, in particular for the finer size classes. The data for the coarser grain sizes were more scattered, suggesting sediment motion by mechanisms other than as a suspension in the overland flow (e.g., rolling along the soil surface). The optimized parameters indicated that the shield layers (where the shield consists of redeposited eroded sediment) of the wider flumes (1 and 2) developed within 5-10 min from the start of the experiment, whereas in the narrower flumes (3 and 4) they never fully developed. The optimized detachment rates were consistent with previous findings, but the estimated thickness of the deposited layer was too small to provide complete protection of the original soil against raindrop detachment, indicating that the shield was not uniform. The experimental design allowed us to investigate directly the effect of flow non-uniformity on soil erosion by inclusion of an offset drainage point in flume 4. The observations taken during and after the experiment, as well as surface elevation data, confirmed the noticeable impact of non-uniform flow on the erosion process.
000153138 6531_ $$aInterrill erosion
000153138 6531_ $$aSediment concentration
000153138 6531_ $$aRainfall splash
000153138 6531_ $$aBoundary condition asymmetry
000153138 6531_ $$aTransverse width
000153138 6531_ $$aErosion flume
000153138 6531_ $$aDigital terrain model (DTM)
000153138 700__ $$0242872$$g181271$$aJomaa, Seifeddine
000153138 700__ $$0240314$$g169209$$aBarry, David Andrew
000153138 700__ $$0240283$$g175968$$aBrovelli, Alessandro
000153138 700__ $$aSander, Graham C.
000153138 700__ $$aParlange, Jean-Yves
000153138 700__ $$aHeng, B. C. P.
000153138 700__ $$aTromp-van Meerveld, H. J.
000153138 773__ $$j395$$tJournal of Hydrology$$k1-2$$q117-132
000153138 8564_ $$uhttp://www.elsevier.com/wps/find/journaldescription.cws_home/503343/description#description$$zURL
000153138 8564_ $$uhttps://infoscience.epfl.ch/record/153138/files/J%20Hydrol%20Erosion%20Accepted.pdf$$zn/a$$s2505508
000153138 8564_ $$uhttps://infoscience.epfl.ch/record/153138/files/jomaa.pdf$$zn/a$$s1524963
000153138 909C0 $$xU11221$$0252101$$pECOL
000153138 909CO $$ooai:infoscience.tind.io:153138$$qGLOBAL_SET$$particle$$pENAC
000153138 917Z8 $$x169209
000153138 917Z8 $$x169209
000153138 917Z8 $$x169209
000153138 917Z8 $$x169209
000153138 937__ $$aEPFL-ARTICLE-153138
000153138 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000153138 980__ $$aARTICLE