 |
| Titel |
Characterization of spatial heterogeneity of groundwater-stream water interactions using multiple depth streambed temperature measurements at the reach scale |
| VerfasserIn |
C Schmidt, M. Bayer-Raich, M. Schirmer |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 10, no. 6 ; Nr. 10, no. 6 (2006-11-16), S.849-859 |
| Datensatznummer |
250008287
|
| Publikation (Nr.) |
 copernicus.org/hess-10-849-2006.pdf |
|
|
|
|
|
| Zusammenfassung |
| Streambed temperatures can be easily, accurately and inexpensively measured
at many locations. To characterize patterns of groundwater-stream water
interaction with a high spatial resolution, we measured 140 vertical
streambed temperature profiles along a 220 m section of a small man-made
stream. Groundwater temperature at a sufficient depth remains nearly constant
while stream water temperatures vary seasonally and diurnally. In summer,
streambed temperatures of groundwater discharge zones are relatively colder
than downwelling zones of stream water. Assuming vertical flow in the
streambed, the observed temperatures are correlated to the magnitude of water
fluxes. The water fluxes are then estimated by applying a simple analytical
solution of the heat conduction-advection equation to the observed vertical
temperature profiles. The calculated water fluxes through the streambed
ranged between 455 Lm−2 d−1 of groundwater discharging to the
stream and approximately 10 Lm−2 d−1 of stream water entering the
streambed. The investigated reach was dominated by groundwater discharge with
two distinct high discharge locations accounting for 50% of the total flux
on 20% of the reach length. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|