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| Titel |
Scale dependency of fractional flow dimension in a fractured formation |
| VerfasserIn |
Y.-C. Chang, H.-D. Yeh, K.-F. Liang, M.-C. T. Kuo |
| 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 ; 15, no. 7 ; Nr. 15, no. 7 (2011-07-13), S.2165-2178 |
| Datensatznummer |
250012886
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| Publikation (Nr.) |
 copernicus.org/hess-15-2165-2011.pdf |
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| Zusammenfassung |
| The flow dimensions of fractured media were
usually predefined before the determination of the hydraulic parameters from
the analysis of field data in the past. However, it would be improper to
make assumption about the flow geometry of fractured media before site
characterization because the hydraulic structures and flow paths are complex
in the fractured media. An appropriate way to investigate the hydrodynamic
behavior of a fracture system is to determine the flow dimension and aquifer
parameters simultaneously. The objective of this study is to analyze a set
of field data obtained from four observation wells during an 11-day
hydraulic test at Chingshui geothermal field (CGF) in Taiwan in determining
the hydrogeologic properties of the fractured formation. Based on the
generalized radial flow (GRF) model and the optimization scheme, simulated
annealing, an approach is therefore developed for the data analyses. The GRF
model allows the flow dimension to be integer or fractional. We found that
the fractional flow dimension of CGF increases near linearly with the
distance between the pumping well and observation well, i.e. the flow
dimension of CGF exhibits scale-dependent phenomenon. This study provides
insights into interpretation of fracture flow at CGF and gives a reference
for characterizing the hydrogeologic properties of fractured media. |
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