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| Titel |
Distributed hydrologic modeling of a sparsely monitored basin in Sardinia, Italy, through hydrometeorological downscaling |
| VerfasserIn |
G. Mascaro, M. Piras, R. Deidda, E. R. Vivoni |
| 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 ; 17, no. 10 ; Nr. 17, no. 10 (2013-10-24), S.4143-4158 |
| Datensatznummer |
250085970
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| Publikation (Nr.) |
 copernicus.org/hess-17-4143-2013.pdf |
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| Zusammenfassung |
| The water resources and hydrologic extremes in Mediterranean basins are
heavily influenced by climate variability. Modeling these watersheds is
difficult due to the complex nature of the hydrologic response as well as
the sparseness of hydrometeorological observations. In this work, we present
a strategy to calibrate a distributed hydrologic model, known as TIN-based
Real-time Integrated Basin Simulator (tRIBS), in the Rio Mannu basin (RMB),
a medium-sized watershed (472.5 km2) located in an agricultural area in
Sardinia, Italy. In the RMB, precipitation, streamflow and meteorological
data were collected within different historical periods and at diverse
temporal resolutions. We designed two statistical tools for downscaling
precipitation and potential evapotranspiration data to create the hourly,
high-resolution forcing for the hydrologic model from daily records. Despite
the presence of several sources of uncertainty in the observations and model
parameterization, the use of the disaggregated forcing led to good
calibration and validation performances for the tRIBS model, when daily
discharge observations were available. The methodology proposed here can be
also used to disaggregate outputs of climate models and conduct
high-resolution hydrologic simulations with the goal of quantifying the
impacts of climate change on water resources and the frequency of hydrologic
extremes within medium-sized basins. |
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