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• W1566989920 abstract "Pumping tests belong to the most common techniques of hydrogeological site assessment. While the steady state drawdown is determined by the distribution of transmissivity alone, the transient behavior is also influenced by the storativity field. In geostatistical inverse modeling the spatial distributions of both transmissivity and storativity are inferred from the drawdown curves and prior information on the spatial correlation of the parameter fields. So far, however, transient data have hardly been analyzed by geostatistical inverse methods because the computational effort is rather high. In the present study, we characterize the drawdown by its temporal moments. We present moment‐generating equations and corresponding equations to compute the sensitivity of the temporal moments of drawdown with respect to the distributions of transmissivity and storativity. We utilize these equations to infer the transmissivity and storativity fields from transient pumping tests using the quasi‐linear geostatistical approach of inverse modeling. Considering temporal moments rather than full drawdown curves drastically reduces the computational effort of the estimation procedure. In test cases we show that the first two temporal moments are sufficient to characterize the drawdown curves. We investigate how erroneous assumptions regarding the spatial variability of storativity affect the estimate of the transmissivity field, and we analyze the effect of truncating the measured drawdown curves." @default.
• W1566989920 created "2016-06-24" @default.
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• W1566989920 date "2005-08-01" @default.
• W1566989920 modified "2023-10-13" @default.
• W1566989920 title "Geostatistical inverse modeling of transient pumping tests using temporal moments of drawdown" @default.
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• W1566989920 doi "https://doi.org/10.1029/2004wr003874" @default.
• W1566989920 hasPublicationYear "2005" @default.
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