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VERSION:2.0
PRODID:-//Memento EPFL//
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SUMMARY:Effects of variable sediment - water fluxes on water quality in la
 kes and oceans
DTSTART:20141021T161500
DTEND:20141021T171500
DTSTAMP:20260427T215429Z
UID:0502fe541f096a5cbc4a1d13df85e20344de5aba4c99faf6e153112e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Lee Bryant\, Research Unit for Water\, Environment and Infr
 astructures Resilience\, Dept of Architecture and Civil Engineering\, Univ
 ersity of Bath\, UK\nAbstract:\nDynamic turbulence in the bottom boundary 
 layer can have significant influence on thevertical distribution of dissol
 ved oxygen (O2)and other solutes at the sediment-water interface.  In mar
 ine environments\, O2 penetration into the sediment is strongly affected b
 y transport processes such as wave-driven turbulence and molecular diffusi
 on.  In lacustrine environments\, which typically have decreased turbulen
 ce and less-permeable sediments\, transport of O2 through the diffusive bo
 undary layer controls sediment O2 uptake.  While turbulence in marine sys
 tems is often much greater than in lakes and reservoirs due to tidal motio
 n\, it is becoming apparent that sediment O2 uptake in lacustrine systems 
 may vary in response to turbulence much more extensively than previously t
 hought.  Results will be presented from several studies that focus on how
  turbulence and sediment composition affects sediment O2 uptake\, nutrient
  fluxes\, and subsequent water quality in both lacustrine and marine envir
 onmentsusing simultaneous in-situ current velocity and concentration measu
 rements.  This presentation will highlight the 1) transient nature of sed
 iment-water fluxes and 2) similarities and differences in the processes co
 ntrolling these fluxes in lacustrine and ocean environments.Short biograph
 y:\nOriginally from Knoxville\, Tennessee\, USA\, I obtained my Bachelor o
 f Science degree in Civil Engineering at the University of Tennessee in 20
 00.  I performed graduate work on biogeochemical cycling and drinking wat
 er quality at Virginia Tech (USA) and Eawag (Master of Science in Geotechn
 ical Engineering in 2003 and PhD in Civil and Environmental Engineering in
  2010).  I worked as a US NSF Earth Science Postdoctoral Fellow at Duke U
 niversity (USA) and ETH Zurich from 2010-2012 studying biogeochemical cycl
 ing of manganese. I am currently working at the Helmholtz Centre for Ocean
  Research Kiel (Germany) researching oxygen and nutrient fluxes in oceanic
  oxygen minimum zones.  I will begin a faculty position within the Depart
 ment of Architecture and Civil Engineering at the University of Bath (UK) 
 in September 2014.
LOCATION:GR A3 31 http://plan.epfl.ch/?room=GR%20A3%2031
STATUS:CONFIRMED
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