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PORTAIL D'INFORMATION GÉOGRAPHIQUE

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  • Tie channel sedimentation rates, oxbow formation age and channel migration rate from optically stimulated luminescence (OSL) analysis of floodplain deposits
  • and allow the exchange of water and suspended sediment between the two. In all 3 river systems, OSL dating allowed the determination of vertical accretion rates, tie channel advancement rates, and oxbow lake ages.
  • The Be 7/Pb 210 ratio as an indicator of suspended sediment age or fraction new sediment in suspension
  • Presented here is a model which uses the Be 7/Pb 210 ratio in suspended sediments to determine the time since the particles were tagged by precipitation-derived radionuclides (i.e. the age of the suspended sediment). In addition, an alternative
  • The AA. consider the importance of the lithosphere flexural strength on the isostatic response of the system to erosion. Using a numerical method to solve the heat transport equation in 3 dimensions, the AA. show how a synthetic age distribution can
  • be computed and how it is affected by their assumption about the isostatic response of the lithosphere to surface unloading. The AA. then investigate whether the age distribution is sensitive to the assumed erosional response time. Finally they use