 |
| Titel |
Thermal damping and retardation in karst conduits |
| VerfasserIn |
A. J. Luhmann, M. D. Covington, J. M. Myre, M. Perne, S. W. Jones, E. C. Jr. Alexander, M. O. Saar |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 19, no. 1 ; Nr. 19, no. 1 (2015-01-09), S.137-157 |
| Datensatznummer |
250120585
|
| Publikation (Nr.) |
 copernicus.org/hess-19-137-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| Water temperature is a non-conservative tracer in the environment.
Variations in recharge temperature are damped and retarded as water
moves through an aquifer due to heat exchange between water and
rock. However, within karst aquifers, seasonal and short-term
fluctuations in recharge temperature are often transmitted over long
distances before they are fully damped. Using analytical solutions and
numerical simulations, we develop relationships that describe the
effect of flow path properties, flow-through time, recharge
characteristics, and water and rock physical properties on the damping
and retardation of thermal peaks/troughs in karst conduits. Using
these relationships, one can estimate the thermal retardation and
damping that would occur under given conditions with a given conduit
geometry. Ultimately, these relationships can be used with thermal
damping and retardation field data to estimate parameters such as
conduit diameter. We also examine sets of numerical simulations where
we relax some of the assumptions used to develop these relationships,
testing the effects of variable diameter, variable velocity, open
channels, and recharge shape on thermal damping and retardation to
provide some constraints on uncertainty. Finally, we discuss a multitracer
experiment that provides some field confirmation of our relationships. High
temporal resolution water temperature data are required to obtain
sufficient constraints on the magnitude and timing of thermal peaks
and troughs in order to take full advantage of water temperature as
a tracer. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|