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| Titel |
Using the nonlinear aquifer storage–discharge relationship to simulate the base flow of glacier- and snowmelt-dominated basins in northwest China |
| VerfasserIn |
R. Gan, Y. Luo |
| 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. 9 ; Nr. 17, no. 9 (2013-09-25), S.3577-3586 |
| Datensatznummer |
250085933
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| Publikation (Nr.) |
 copernicus.org/hess-17-3577-2013.pdf |
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| Zusammenfassung |
| Base flow is an important component in hydrological modeling. This process is
usually modeled by using the linear aquifer storage–discharge relation
approach, although the outflow from groundwater aquifers is nonlinear. To
identify the accuracy of base flow estimates in rivers dominated by snowmelt
and/or glacier melt in arid and cold northwestern China, a nonlinear
storage–discharge relationship for use in SWAT (Soil Water Assessment Tool)
modeling was developed and applied to the Manas River basin in the Tian Shan
Mountains. Linear reservoir models and a digital filter program were used
for comparisons. Meanwhile, numerical analysis of recession curves from 78
river gauge stations revealed variation in the parameters of the nonlinear
relationship. It was found that the nonlinear reservoir model can improve
the streamflow simulation, especially for low-flow period. The higher
Nash–Sutcliffe efficiency, logarithmic efficiency, and volumetric efficiency, and
lower percent bias were obtained when compared to the one-linear reservoir
approach. The parameter b of the aquifer storage–discharge function varied
mostly between 0.0 and 0.1, which is much smaller than the suggested value
of 0.5. The coefficient a of the function is related to catchment properties,
primarily the basin and glacier areas. |
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