Report and analysis of the BULLION forced-gradient experiment Page: 81 of 190
This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
Report and Analysis of the BULLION Forced-Gradient Experiment
4.2 Dual-Porosity Analysis
Dual-porosity analysis provides much improved curve fits for the very
early-time data. The parameters returned by this analysis include
separate fracture (K, meters per day) and matrix (K', meters per day)
conductivity values, and apportionment of the storage into fracture
(Ss, one per meter) and matrix (Ss', one per meter) components. This
analysis was also done using the AQTESOLV software, which
implements a dual porosity model included in Moench (1984). The best
fit for the Well ER-20-6 #1 response is illustrated in Figure 4-8, for the
Well ER-20-6 #2 response in Figure 4-9, and for the Well ER-20-6 #1 to
#2 response in Figure 4-10. The calculated transmissivities are similar
to the Theis-analysis values for transmissivity, and the matrix
conductivities are much lower than the fracture conductivities,
supporting the expectation that fracture flow dominates groundwater
movement. The sum of the storage coefficients for fractures and matrix
are similar to the storage coefficient from the Theis solution, as would
be expected. In later time, the dual-porosity solution curves merge
with the Theis solution curves.Figure 4-8
ER-20-6 #1 Dual Porosity Analysis4.0 Analysis of Hydraulic Response
1.
0.1
S0.01
00
K = 2.57 n/day
0.00 Ss 2.1639E-0RS
K' 0 .0007787 rt/day
Ss'z 4.5611E-06E
a~a000
0.001 0.01 0.1 1.
Time (days)4-7
Upcoming Pages
Here’s what’s next.
Search Inside
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Report and analysis of the BULLION forced-gradient experiment, report, August 1, 1998; United States. (https://digital.library.unt.edu/ark:/67531/metadc677665/m1/81/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.