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| Titel |
Application of stochastic well testing analysis techniques at the Hydrogeological Experimental Site of Poitiers, France |
| VerfasserIn |
M. Riva, A. Guadagnini, J. Bodin, F. Delay |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250026785
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| Zusammenfassung |
| We provide a geostatistical characterization of the transmissivity distribution of the fractured
limestone aquifer constituting the Hydrogeological Experimental Site of Poitiers, France. We
use cross-hole pumping test information (also referred to as interference testing) collected
during two extensive experimental campaigns performed in 2004 and 2005 and provide an
estimate of the key geostatistical descriptors of the spatial variability of the natural logarithm
of transmissivity at the site, when the latter is interpreted in a continuous porous medium
framework. To do so we apply the stochastic well testing methodology of Neuman et al.
[2004, 2007]. The latter is based on stochastic type-curves of mean drawdown and
associated variance and allows estimating the geometric mean, integral scale, and
variance of local log-transmissivities on the basis of quasi steady state hydraulic
head data collected during a routine pumping test performed within a randomly
heterogeneous aquifer. The reliability of the results is discussed by comparison
against previous deterministic analyses performed at the site. The estimated values
of integral scales and variance of log-transmissivity are then analyzed in light of
multiscale theories which conceptualize the heterogeneity of porous and fractured
systems as hierarchical random processes distributed across a multiplicity of scales. |
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