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| Titel |
Use of satellite data to assess the impacts of irrigation withdrawals on Upper Klamath Lake, Oregon |
| VerfasserIn |
Q. Tang, E. A. Rosenberg, D. P. Lettenmaier |
| 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 ; 13, no. 5 ; Nr. 13, no. 5 (2009-05-20), S.617-627 |
| Datensatznummer |
250011861
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| Publikation (Nr.) |
 copernicus.org/hess-13-617-2009.pdf |
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| Zusammenfassung |
| Competition for scarce water resources in the Upper Klamath River Basin,
Oregon has generated conflict among its stakeholders, as demonstrated by
recent regulations on withdrawals from Upper Klamath Lake. Information on
agricultural water usage can help assess the hydrologic impacts of irrigation
and support operational decisions. This paper presents an experimental
satellite-based evapotranspiration estimation system that is combined with
the Variable Inflitration Capacity (VIC) hydrological model to estimate
irrigation consumption, which is then used to assess the effects of irrigated
agriculture on lake storage volumes and water levels. The hydrological model
is calibrated with streamflow observations and used to estimate unmeasured
lake inflows and guide water budget calculations. When combined with the VIC
model, the satellite-based evapotranspiration estimation system shows that
irrigation caused a decline of 0.3 m in average annual water levels and 0.5 m
in mean October water levels, and an increase of 0.5 m in annual water level
ranges at the lake from 2001 to 2005. The results demonstrate the potential
of satellite data for agricultural water resource management at the regional
scale. |
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