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SUMMARY:Wind Tunnel Studies of Shear-Stress Partitioning in Live Plant Can
 opies
DTSTART:20130426T111500
DTEND:20130426T120000
DTSTAMP:20260427T215254Z
UID:7ae5467779f66f8b5164623849dd8ef0aed79a021a56301355feac36
CATEGORIES:Conferences - Seminars
DESCRIPTION:Le lauréat du Prix Ryhming : Dr. Benjamin Walter\nBio : Insti
 tute for Snow and Avalanche Research SLF\nOrganisational unit: \nSnow and
  Permafrost\nSnow cover and Micrometeorology\nEducation\n    2002 – 2
 008 Physics\, University Karlsruhe (KIT)\n    2007 – 2008 Diploma The
 sis at Fraunhofer ISE in Freiburg\n    2005 – 2006 Kungliga Tekniska 
 Högskolan (KTH) Stockholm\nResearch interests\n    Vegetation-Atmosphe
 re Interaction\n    Wind Erosion\, Transport and Deposition Processes\n
     Turbulent Boundary Layer Flow over Snow and Vegetation\n    Shea
 r stress partitioning\nThe main objective of this study was to improve the
  understanding and the prediction of the sheltering capability of live  p
 lant canopies against sediment erosion. Such investigations are particular
 ly important in times of global warming\, where increasing desertification
  and land degradation\, mainly driven by sediment erosion\, became major p
 roblems in more and more countries worldwide. Previous wind tunnel investi
 gations on shear stress partitioning (a method to quantify the sheltering 
 effect) exclusively used rigid plant imitations like cylinders or blocks f
 or the experiments\, which poorly reflect the aerodynamical behaviour of l
 ive plants. The influences of the live plants flexibility and porosity on 
 the sheltering effect were investigated by means of surface shear stress m
 easurements. The surface shear stress on the ground beneath the plant cano
 pies determines the onset and the degree of sand\, soil or snow erosion\, 
 and was measured with relatively high spatial and temporal resolution. The
  data was further used to improve a theoretical model which allows the pre
 diction of the sheltering capability of vegetation canopies. The results a
 re also relevant for practical applications\, e.g. to identify suitable an
 d sustainable counteractive measures against wind erosion for example.
LOCATION:ME B10 http://plan.epfl.ch/?room=ME%20B1%20B10
STATUS:CONFIRMED
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