Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Allan L. Gutjahr"'
Publikováno v:
Advances in Water Resources. 22:549-555
A recursion formulation for the transport of linearly sorbing solutes undergoing nonequilibrium sorption is developed. Constant or spatially varying sorption kinetics can be modeled using the recursion approach. The sorption and desorption rates are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9fbe70690f8c81f60a35d19c7c4b11c9
https://doi.org/10.1016/s0309-1708(98)00023-2
https://doi.org/10.1016/s0309-1708(98)00023-2
Autor:
A. K Mishra, Allan L. Gutjahr
Publikováno v:
Mathematical Geology. 31:771-791
A recursion formulation for the transverse spreading of a solute is developed, and under conditions of steady flow in a stratified aquifer, the transport of a linearly sorbing solute undergoing nonequilibrium sorption is studied. The effect of spatia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac9eceaeb827a013737e63b865947ab3
https://doi.org/10.1023/a:1007520716287
https://doi.org/10.1023/a:1007520716287
Publikováno v:
Water Resources Research. 35:43-54
With the aid of linear filter theory we analyze 13,824 permeability measurements to empirically address the question, What does an instrument measure? By measure we mean the sample support or sample volume associated with an instrument, as well as ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00754a04d7edb8aed52d96892f20b475
https://doi.org/10.1029/1998wr900011
https://doi.org/10.1029/1998wr900011
Autor:
D. P. Gallegos, Dennis McLaughlin, Allan L. Gutjahr, D. A. Zimmerman, Banda S. RamaRao, A. M. Lavenue, C. L. Axness, Jesús Carrera, C. Ravenne, G. de Marsily, Gedeon Dagan, Shlomo P. Neuman, C. A. Gotway, Rafael L. Bras, J. Jaime Gómez-Hernández, Melvin G. Marietta, A. Galli, R. L. Beauheim, Peter K. Kitanidis, P. Grindrod, P. B. Davies, Yoram Rubin
Publikováno v:
Water Resources Research. 34:1373-1413
This paper describes the first major attempt to compare seven different inverse approaches for identifying aquifer transmissivity. The ultimate objective was to determine which of several geostatistical inverse techniques is better suited for making
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d93356d86e596143197874bc462490b9
https://doi.org/10.1029/98wr00003
https://doi.org/10.1029/98wr00003
Publikováno v:
Mathematical Geology. 29:361-389
A procedure for generating joint statistically homogeneous random fields is examined. The method is based on the spectral representation theorem. It handles large fields easily and is both rapid and flexible. Algorithm development and examples are pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::149cbb8d906c3ab354a1cef5e295eb24
https://doi.org/10.1007/bf02769641
https://doi.org/10.1007/bf02769641
Publikováno v:
Journal of Hydrology. 183:169-190
An efficient cosimulator is developed for generating both random hydraulic property fields and related flow regimes under either saturated or unsaturated conditions. This cosimulator combines a spectral random field generator, based on the Fast Fouri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25c270368070fa122994128c8bb32945
https://doi.org/10.1016/s0022-1694(96)80040-0
https://doi.org/10.1016/s0022-1694(96)80040-0
Publikováno v:
Ground Water. 33:33-41
The importance of field heterogeneities in ground-water pollution problems has been widely recognized during the last few decades. To address the impact of field heterogeneities on ground-water flow and solute transport, many different stochastic met
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::04c556d5134d15df838fc3afae23782c
https://doi.org/10.1111/j.1745-6584.1995.tb00260.x
https://doi.org/10.1111/j.1745-6584.1995.tb00260.x
Publikováno v:
Stochastic Hydrology and Hydraulics. 8:79-108
The use of data to condition single random fields has a well-established history. However, the joint use of data from several cross-correlated random fields is not as well developed. For example, the use of both transmissivity and head data in a stea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b47ce0e2bc282ce61db988e4b644752a
https://doi.org/10.1007/bf01581391
https://doi.org/10.1007/bf01581391
Autor:
Allan L. Gutjahr, Rafael L. Bras
Publikováno v:
Reliability Engineering & System Safety. 42:293-316
Stochastic models of spatial variation as they apply to both saturated and unsaturated flow and transport problems are examined in this paper. Both modeling and data interpretive geostatistical approaches are reviewed and an integrated discussion com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::866dde41d9a7188fe20e1b3ce6d714b8
https://doi.org/10.1016/0951-8320(93)90095-g
https://doi.org/10.1016/0951-8320(93)90095-g
Publikováno v:
Geostatistics for the Next Century ISBN: 9789401043540
Joint conditional simulations of two related stochastic fields is of importance in many cases. This is especially the case in groundwater hydrology where permeability and head, for example are related via a partial differential equation.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce1351810299f29570501dc3214cbb8a
https://doi.org/10.1007/978-94-011-0824-9_23
https://doi.org/10.1007/978-94-011-0824-9_23
