Journal
ENGINEERING GEOLOGY
Volume 116, Issue 1-2, Pages 166-177Publisher
ELSEVIER
DOI: 10.1016/j.enggeo.2010.08.007
Keywords
Fractures; Fracture network model; Crack permeability tensor; Ingrowth-decay transport; Lan-Yu island; Taiwan
Funding
- National Research Council [NSC-98-3114-E-007-015]
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Very efficient and practical models that use a crack tensor in terms of fracture geometry parameters for field rock mass are proposed. A framework of the crack tensor approach combined with the identifying fracture-controlled characteristics was successively used in a hypothetical hydro-geological field for determining the dynamics of flow and transport of nuclides in fractured rock. The modeling results and site-specific data of Lan-Yu Island in Taiwan reveal the characteristics associated with the geometry of fracture networks under the prescribed boundaries. The simulated fracture networks were transformed into a grid-based simulation procedure under consideration of the delaying effect in matrix owing to particle migration. Synthetic flow results indicate that the flowing vector is very sensitive to fracture intensity (P-32); high fracture intensity leads to high velocity. Heterogeneity generated by fractures' field will result in the shortest and the longest transmission distance of 12-fold difference. While taking into consideration of the ingrowth-decay transport, the plumes of the daughter product were relatively tortuous and anomalous to predict. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
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