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State of the art of catchment-scale residence time: conceptualization, modeling and analysis

January 19-21, 2009 Vienna Austria
IAEA, Vienna International Centre (VIC), Vienna Austria

This workshop focuses on state of the art of watershed residence time conceptualization, modeling and analysis. The workshop will include short invitation-only presentations on residence time (defined as the transit time from the soil surface to the stream channel). The workshop will build towards construction of distributed watershed runoff models that include residence time as output. Topics will include; how to quantify the residence time (RT), its distribution and its uncertainty; how to deal with RT in watershed hydrology models (and related mixing assumptions) and how to think about RT as landscape scaling metric. Discussion topics will be aimed at identifying gaps in knowledge and new work necessary to move the field to a new level. All invited speakers will contribute to a white paper (planned to be published as an HP Commentary) that will articulate these needs to the broader community.

Theme 1: Residence time introduction and basics: Classical approaches

Translating tracers into residence time: Definitions, tracer types, standard methods
Kip Solomon, University of Utah

Lumped parameter approach in single- and double-porous media.
Piotr Maloszewski, German Research Center for Environmental Health (GmbH)

Classic lab and field experiments: From Horton and Hawkins to the Gardsjön covered roof
Allan Rodhe, Uppsala U

Catchment travel time distributions -- how should we define, measure, and interpret them?
Jim Kirchner, ETH Zurich

Theme 2: Theoretical controls on residence time: New theoretical constructs

Travel, residence and lifetime distributions in river basins
Andrea Rinaldo, EPFL Lausanne

Hillslope Peclet numbers, slope geometry and theoretical basis for RT
Peter Troch, U Arizona

Quantification and mapping of solute travel times in catchments: spatial, statistical and source/flow-specific distributions
Gia Destouni , U Stockholm

Theme 3: Physical controls on residence time: Recent field experimental results

Different residence time estimates from 18-O and Tritium: Case studies at Pukemanga and Tutaeuaua catchments
Mike Stewart, Aquifer Dynamics Ltd.

Does topography control catchment transit time?
Kevin McGuire, Virginia Tech

Scaling relationships revisited: how soil drainage class trumps terrain and incorporation into models
Chris Soulsby, Aberdeen U

Scaling relationships in a sedimentary basin: preliminary results from Luxembourg
Laurent Pfister, Lippmann Institute

How does landscape structure influence catchment transit time across different geomorphic provinces?
Doerthe Tetzlaff , University of Aberdeen

Theme 3 cont’: Physical controls on residence time: Recent field experimental results

Using hydrograph recession as a proxy for RT across scale
April James, NC State University

The observed nature of solute residence time distributions in stream networks and how these compare with a compartmental representation of a watershed
Anders Wörman , Royal Institute of Technology, Stockholm

Virtual watershed residence time and virtual preferential flow effects
Markus Weiler, Freiburg U

Theme 4: Parameterizing mixing into our watershed rainfall-runoff models?

Simple catchment models - complex transit time distributions
Jan Seibert, ETH Zurich

A space-time accounting scheme to capture RT in watershed models
Taka Sayama, Kyoto University

Integrating tracer data with conceptual models for hypothesis development
Sarah Dunn, McCauley Institute

Mixing assumptions, uncertainty, equifinality
Keith Beven, Lancaster U




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