 |
| Titel |
Multi-objective automatic calibration of hydrodynamic models utilizing inundation maps and gauge data |
| VerfasserIn |
N. V. Dung, B. Merz, A. Bárdossy, T. D. Thang, H. Apel |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 4 ; Nr. 15, no. 4 (2011-04-29), S.1339-1354 |
| Datensatznummer |
250012756
|
| Publikation (Nr.) |
 copernicus.org/hess-15-1339-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| Automatic and multi-objective calibration of hydrodynamic models is –
compared to other disciplines like e.g. hydrology – still underdeveloped.
This has mainly two reasons: the lack of appropriate data and the large
computational demand in terms of CPU-time. Both aspects are aggravated in
large-scale applications. However, there are recent developments that
improve the situation on both the data and computing side. Remote sensing,
especially radar-based techniques proved to provide highly valuable
information on flood extents, and in case high precision DEMs are present,
also on spatially distributed inundation depths. On the computing side the
use of parallelization techniques brought significant performance gains. In
the presented study we build on these developments by calibrating a
large-scale 1-dimensional hydrodynamic model of the whole Mekong Delta
downstream of Kratie in Cambodia: we combined in-situ data from a network of
river gauging stations, i.e. data with high temporal but low spatial
resolution, with a series of inundation maps derived from ENVISAT Advanced
Synthetic Aperture Radar (ASAR) satellite images, i.e. data with low
temporal but high spatial resolution, in an multi-objective automatic
calibration process. It is shown that an automatic, multi-objective
calibration of hydrodynamic models, even of such complexity and on a large
scale and complex as a model for the Mekong Delta, is possible. Furthermore,
the calibration process revealed model deficiencies in the model structure,
i.e. the representation of the dike system in Vietnam, which would have been
difficult to detect by a standard manual calibration procedure. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|