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| Titel |
Interpretation of residence time from bed elevation measurements |
| VerfasserIn |
Rina Schumer, Hal Voepel, Marwan Hassan, Gary Parker |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250075053
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| Zusammenfassung |
| Transport rates of individual particles are affected by residence time in the bed. Similarly,
virtual velocity of bulk sediment is affected by residence time distribution. Residence time of
a particle at level z in a bed is the elapsed time between the movement of the bed surface
above z (deposition) and return to z (erosion). Thus, fine-scale LIDAR or sonar transducer
tracked bed elevations provide direct measurement of residence time with depth in the bed.
We describe observations and models for residence time distributions using continuous bed
elevation readings from ten flume experiments conducted under equilibrium conditions: five
using well-sorted sediment on plane-bed morphology under low flow regime, and five using
poorly-sorted sediment on large-scale bedform morphology under high flow regime. |
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