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SUMMARY:Channel evolution after dam removal in a poorly-sorted sediment mi
 xture: experiments and numerical model
DTSTART:20141121T100000
DTEND:20141121T110000
DTSTAMP:20260510T040509Z
UID:3eb2cf1808e19683bf890fa0e5ec10d5e9267e14021d193fb9f3ba9b
CATEGORIES:Conferences - Seminars
DESCRIPTION:Carles Ferrer Boix\nDam removal is commonly used for river res
 toration. However\, there are still some uncertainties associated with dam
  removal\, mainly related to the sediment transport rates released downstr
 eam from the deposit that had previously filled the impoundment. This rese
 arch studies the physical response to dam removal in the antecedent deposi
 t by answering the following questions: a) how does an initial channel exc
 avated into the deposit evolve\, and b) what is the time distribution of t
 he material released during the early stages of the process. These goals a
 re achieved by an experimental campaign using a poorly sorted mixture of s
 ediment in the antecedent deposit. This investigation provides new insight
 s of the width evolution when the sediment is composed of a poorly-sorted 
 mixture. This evolution is linked to the bed degradation rates: channel na
 rrows during a rapid incisional phase\, and subsequently widens when bed d
 egradation rates decrease. These features are modeled through a new numeri
 cal model accounting for mixtures. More specifically\, a set of equations 
 has been derived for the variation of bed elevation\, channel bottom width
  and bed grain size distribution\, that when solved numerically\, describe
  the observed channel processes.\nDr. Carles Ferrer Boix got his MSc and P
 hD in Civil Engineering in the Technical University of Catalonia (UPC) and
  he is currently postdoctoral and teaching fellow at the Department of Geo
 graphy\, at the University of British Columbia (Vancouver\, Canada). His m
 ain interests are sediment transport\, river morphology\, laboratory exper
 iments and numerical modelling. Currently he is mostly performing experime
 ntal research on mountain streams.
LOCATION:GC B2 424 http://plan.epfl.ch/?lang=en&zoom=20&recenter_y=5864231
 .00926&recenter_x=730971.16423&layerNodes=fonds\,batiments\,labels\,inform
 ation\,parkings_publics\,arrets_metro\,transports_publics&floor=2&q=GC_B2%
 204
STATUS:CONFIRMED
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