Channel model of flow through fractured media
On the basis of a review of recent theoretical and experimental studies of flow through fractured rocks, the authors have studied the fluid flow and solute transport in a tight fractured medium in terms of flow through channels of variable aperture. The channels are characterized by an aperture density distribution and a spatial correlation length. Aperture profiles along the channels are statistically generated and compared to laboratory measurements of fracture surfaces. Calculated tracer transport between two points in the fractured media is by way of a number of such channels. Tracer breakthrough curves display features that correspond well with recent data by Moreno et al., which lends support to the validity of our model. Calculated pressure profiles along the channels suggest possible measurements that may be useful in identifying the geometrical characteristics of the channels. Finally, predictions were made for tracer breakthrough curves in the case of single fractures under various degrees of normal stress. These suggest possible laboratory experiments which may be performed to validate this conceptual model.
- Research Organization:
- Lawrence Berkeley Lab., CA
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6353684
- Journal Information:
- Water Resour. Res.; (United States), Journal Name: Water Resour. Res.; (United States) Vol. 23:3; ISSN WRERA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Terrestrial-- Site Resource & Use Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
ENVIRONMENTAL TRANSPORT
FAILURES
FLUID FLOW
FLUID MECHANICS
FRACTURE PROPERTIES
FRACTURES
GEOLOGIC FISSURES
GEOLOGIC STRUCTURES
MASS TRANSFER
MECHANICAL PROPERTIES
MECHANICS
ROCKS
SOLUTES
STRESS INTENSITY FACTORS