U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of
the Technical Meeting Charleston South Carolina March 8-12, 1999--Volume 3
of 3--Subsurface Contamination From Point Sources, Water-Resources
Investigations Report 99-4018C
Computer Simulation of Fluid Flow in Fractured Rocks at
the Mirror Lake FSE Well Field
By Paul A. Hsieh, Allen M. Shapiro, and Claire R. Tiedeman
ABSTRACT
A numerical finite-difference model is developed to simulate fluid
flow in the fractured rock underlying the FSE well field at the
U.S. Geological Survey Fractured Rock Research Site near Mirror
Lake, New Hampshire. Highly transmissive fracture clusters in the
bedrock are represented by model cells of comparatively higher
hydraulic conductivity. The surrounding bedrock containing less
transmissive fractures is represented by model cells of
comparatively lower hydraulic conductivity. The model is
calibrated to drawdown data from a multiple-well hydraulic
test. Calibration results suggest that the highly transmissive
fracture clusters are three to four orders of magnitude more
conductive than the surrounding bedrock with less transmissive
fractures. Relatively good matches between simulated and observed
drawdowns suggest that a heterogeneous continuum model can be
applied to simulate fluid flow in the fractured rock underlying
the FSE well field.
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