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| Titel |
Triple diagram model of level fluctuations in Lake Van, Turkey |
| VerfasserIn |
A. Altunkaynak, M. Özger, Z. Sen |
| 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 ; 7, no. 2 ; Nr. 7, no. 2, S.235-244 |
| Datensatznummer |
250004531
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| Publikation (Nr.) |
 copernicus.org/hess-7-235-2003.pdf |
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| Zusammenfassung |
| This paper presents a triple diagram method (TDM) based on the Kriging
technique for predicting future lake levels from two antecedent measurements, which are
considered as independent variables. The experimental semivariograms (SV) for three lags
are obtained, and the most suitable theoretical SV for the three cases is the Gaussian
type. Based on these theoretical SVs, the contour lines of the dependent variable are
constructed by Kriging. The resulting maps are referred to as the TDM model for lake
level fluctuation. It is expected that this model will be used more extensively than the
Markov or ARIMA (AutoRegressive Integrated Moving Average) models commonly available for
stochastic modelling and predictions. The TDM does not have restrictive assumptions such
as the stationarity and ergodicity which are preliminary requirements for the stochastic
modelling. The TDM is applied to monthly level fluctuations of Lake Van in eastern Turkey.
In the prediction procedure lags, one, two and three are considered. Interpretations from
these three basic diagrams help to identify properties of lake level fluctuations. It is
observed that the TDM preserves the statistical properties. These diagrams also help to
make predictions with less than 10 % relative error.
Keywords: fluctuation, hydrologic budget, lake level, Kriging, prediction |
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