 |
| Titel |
The benefits of gravimeter observations for modelling water storage changes at the field scale |
| VerfasserIn |
B. Creutzfeldt, A. Güntner, S. Vorogushyn, B. Merz |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 14, no. 9 ; Nr. 14, no. 9 (2010-09-01), S.1715-1730 |
| Datensatznummer |
250012420
|
| Publikation (Nr.) |
 copernicus.org/hess-14-1715-2010.pdf |
|
|
|
|
|
| Zusammenfassung |
| Water storage is the fundamental state variable of hydrological systems.
However, comprehensive data on total water storage changes (WSC) are
practically inaccessible by hydrological measurement techniques at the field
or catchment scale, and hydrological models are highly uncertain in
representing the storage term due to the lack of adequate validation or
calibration data. In this study, we assess the benefit of temporal
gravimeter measurements for modelling WSC at the field scale. A simple
conceptual hydrological model is calibrated and evaluated against records of
a superconducting gravimeter (SG), soil moisture, and groundwater time series. The
model is validated against independently estimated WSC based on lysimeter
measurements. Using gravimeter data as a calibration constraint improves the
model results substantially in terms of predictive capability and variation
of the behavioural model runs. Thanks to their capacity to integrate over
different storage components and a larger area, gravimeters provide
information on total WSC that can be used to constrain the overall status of
the hydrological system in a model. The general problem of specifying the
internal model structure or individual parameter sets can, however, not be
solved with gravimeters alone. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|