Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Fracture (geology)"'
Publikováno v:
Water Resources Research. 37:2481-2491
Laboratory experiments were conducted to study solute transport along preferential flow paths in unsaturated, inclined fractures. Qualitative aspects of solute transport were identified in a miscible dye tracer experiment conducted in a transparent r
Autor:
C. F. Tsang, Y. W. Tsang
Publikováno v:
Water Resources Research. 37:831-835
A particle-tracking method has been developed to calculate tracer transport in fractures with diffusion into finite rock matrix blocks. The method is an extension of the work of Yamashita and Kimura [1990], which is only applicable to diffusion into
Publikováno v:
Water Resources Research. 36:3139-3149
The effect of microscale surface roughness in fracture walls is shown to accelerate colloid transport relative to a tracer and to increase colloid capture. These results are from experiments on duplicate laboratory experiments using synthetic, neutra
Autor:
Matthew W. Becker, Allen M. Shapiro
Publikováno v:
Water Resources Research. 36:1677-1686
Extended tailing of tracer breakthrough is often observed in pulse injection tracer tests conducted in fractured geologic media. This behavior has been attributed to diffusive exchange of tracer between mobile fluids traveling through channels in fra
Autor:
O. C. Reedy, Jin-Ping Gwo, William E. Sanford, J. S. Riggs, D. S. Hicks, P. M. Jardine, W. B. Bailey
Publikováno v:
Water Resources Research. 35:2015-2030
A significant limitation in defining remediation needs at contaminated sites often results from an insufficient understanding of the transport processes that control contaminant migration. The objectives of this research were to help resolve this dil
Publikováno v:
Water Resources Research. 48
Investigations of solute transport in fractured rock aquifers often rely on tracer test data acquired at a limited number of observation points. Such data do not, by themselves, allow detailed assessments of the spreading of the injected tracer plume
Autor:
Allen F. Moench
Publikováno v:
Water Resources Research. 31:1823-1835
An exact Laplace transform solution to the problem of dispersion, advection, and adsorption of a tracer due to its injection in a steady, horizontal, radially convergent flow field in a densely fractured, porous formation (double-porosity aquifer) is
Autor:
James R. Hunt, John H. Kessler
Publikováno v:
Water Resources Research. 30:1195-1206
A water-saturated fracture, partially clogged with porous material coating the fracture surfaces, is considered. Fluid flow and contaminant transport in this fracture are significantly altered relative to an unclogged fracture. Analytical expressions
Autor:
K. S. Novakowski, P. A. Lapcevic
Publikováno v:
Water Resources Research. 30:37-44
The results of a tracer experiment conducted in a single fracture are interpreted using a semianalytical model which accounts for advective dispersion, matrix diffusion, mixing in the test zones, and for tortuosity. The experiment was conducted using
Publikováno v:
Water Resources Research. 29:2975-2982
Previous theoretical discussion of flow and transport in a single fracture has led to a difference of opinion as to whether the aperture estimated from a tracer test need always be less than (or greater than) the aperture estimated from a concurrent