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| Titel |
Frozen soil parameterization in a distributed biosphere hydrological model |
| VerfasserIn |
L. Wang, T. Koike, K. Yang, R. Jin, H. Li |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 14, no. 3 ; Nr. 14, no. 3 (2010-03-23), S.557-571 |
| Datensatznummer |
250012229
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| Publikation (Nr.) |
 copernicus.org/hess-14-557-2010.pdf |
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| Zusammenfassung |
| In this study, a frozen soil parameterization has been modified and
incorporated into a distributed biosphere hydrological model (WEB-DHM). The
WEB-DHM with the frozen scheme was then rigorously evaluated in a small cold
area, the Binngou watershed, against the in-situ observations from the WATER
(Watershed Allied Telemetry Experimental Research). First, by using the
original WEB-DHM without the frozen scheme, the land surface parameters and
two van Genuchten parameters were optimized using the observed surface
radiation fluxes and the soil moistures at upper layers (5, 10 and 20 cm
depths) at the DY station in July. Second, by using the WEB-DHM with the
frozen scheme, two frozen soil parameters were calibrated using the observed
soil temperature at 5 cm depth at the DY station from 21 November 2007 to 20
April 2008; while the other soil hydraulic parameters were optimized by the
calibration of the discharges at the basin outlet in July and August that
covers the annual largest flood peak in 2008. With these calibrated
parameters, the WEB-DHM with the frozen scheme was then used for a yearlong
validation from 21 November 2007 to 20 November 2008. Results showed that
the WEB-DHM with the frozen scheme has given much better performance than
the WEB-DHM without the frozen scheme, in the simulations of soil moisture
profile at the cold regions catchment and the discharges at the basin outlet
in the yearlong simulation. |
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