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| Titel |
Quantification of the effects of the streambed on the advection of heat along the stream |
| VerfasserIn |
M. C. Westhoff, T. A. Bogaard, H. H. G. Savenije |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250022579
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| Zusammenfassung |
| To investigate the potential of heat as a tracer to quantify lateral inflows in space and time, an
energy balance model has been developed. We confronted this model with high resolution
temperature observation made with DTS (Distributed Temperature Sensing) in a first order
stream in Luxembourg.
One important aspect of the energy balance model is the advection of heat along the stream.
The discharge in the stream is small and the cross-sectional area consists of abundant platy
and angular pebbles and cobbles. Therefore, the stream water flows through the rock clasts
present in the streambed. Consequently, the transport of heat is slower than that of the stream
discharge. This is the result of the fact that in the modeling schematization the storage of heat
is in the whole cross-sectional area, while storage of solutes is only in the part of the
cross-sectional area which is water. We hypothesized that quantifying and implementing the
effect of the streambed on the advection of heat in our model, will improve the modeling
results significantly.
In this research we carried out a tracer experiment in the stream to determine the advection of
heat. We doubled the discharge in the stream for ca. 20 minutes, by emptying a reservoir
upstream. Three tracers were added to the reservoir, namely deuterium, salt and heat (the
temperature of the reservoir was 0 |
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