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You searched for: Author "Bodvarsson, G.S." Remove constraint Author: "Bodvarsson, G.S."
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1. Scale dependency of the effective matrix diffusion coefficient

Author:
Bodvarsson, G.S.,   et al.   ; Liu, H.H.; Zhang, G.;     Show all 3 Authors
Source:
Vadose zone journal 2004 v.3 no.1 pp. -
ISSN:
1539-1663
Subject:
vadose zone; diffusivity; soil transport processes; solutes; radionuclides; hazardous waste; waste disposal; rocks; soil pollution; mathematical models
Abstract:
... It has been recognized that matrix diffusion is an important process for retarding solute transport in fractured rock. Based on analyses of tracer transport data from a number of field tests, we demonstrate for the first time that the effective matrix-diffusion coefficient may be scale dependent and generally increases with test scale. A preliminary theoretical explanation of this scale dependency ...

2. Field-scale effective matrix diffusion coefficient for fractured rock: Results from literature survey

Author:
Bodvarsson, G.S.,   et al.   ; Zhou, Q.L.; Liu, H.H.; Molz, F.J.; Zhang, Y.Q.;     Show all 5 Authors
Source:
Journal of contaminant hydrology 2007 v.93 no.1-4 pp. 161-187
ISSN:
0169-7722
Subject:
aquifers; rocks; groundwater flow; diffusion; diffusivity
DOI:
10.1016/j.jconhyd.2007.02.002

3. The active fracture model: its relation to fractal flow patterns and an evaluation using field observations

Author:
Bodvarsson, G.S.,   et al.   ; Liu, H.H.; Zhang, G.;     Show all 3 Authors
Source:
Vadose zone journal 2003 v.2 no.2 pp. -
ISSN:
1539-1663
Subject:
vadose zone; unsaturated flow; soil transport processes; mathematical models; soil pore system; Nevada
Abstract:
... The active fracture model (AFM) (Liu et al., 1998) has been widely used in modeling flow and transport in the unsaturated zone of Yucca Mountain, Nevada, a proposed repository of high-level nuclear wastes. This study presents an in-depth evaluation of the AFM, based on both theoretical arguments and field observations. We first argue that flow patterns observed from different unsaturated systems ( ...

4. Evaluating the Moisture Conditions in the Fractured Rock at Yucca Mountain: The Impact of Natural Convection Processes in Heated Emplacement Drifts

Author:
Bodvarsson, G.S.,   et al.   ; Birkholzer, J.T.; Webb, S.W.; Halecky, N.; Peterson, P.F.;     Show all 5 Authors
Source:
Vadose zone journal 2006 v.5 no.4 pp. 1172-1193
ISSN:
1539-1663
Subject:
simulation models; waste disposal; radionuclides; fluid mechanics; hazardous waste; water content; soil water; heat transfer; water vapor; Nevada
Abstract:
... The energy output of the high-level radioactive waste to be emplaced in the proposed geologic repository at Yucca Mountain, NV, will strongly affect the thermal-hydrological (TH) conditions in the near-drift fractured rock. Heating of rock water to above-boiling conditions will induce large water saturation changes and flux perturbations close to the waste emplacement tunnels (drifts) that will la ...
DOI:
10.2136/vzj2005.0147

5. Flow focusing in unsaturated fracture networks: a numerical investigation

Author:
Bodvarsson, G.S.,   et al.   ; Zhang, K.; Wu, Y.S.; Liu, H.H.;     Show all 4 Authors
Source:
Vadose zone journal 2004 v.3 no.2 pp. -
ISSN:
1539-1663
Subject:
simulation models; unsaturated conditions; infiltration (hydrology); unsaturated flow; vadose zone; soil water movement; Nevada
Abstract:
... A numerical modeling study is presented to investigate flow-focusing phenomena in a large-scale fracture network, constructed using field data collected from the unsaturated zone of Yucca Mountain, Nevada, the proposed repository site for high-level nuclear waste. The two-dimensional fracture network for an area of 100 by 150 m contains more than 20000 fractures. Steady state unsaturated flow in t ...

6. A mountain-scale model for characterizing unsaturated flow and transport in fractured tuffs of Yucca Mountain

Author:
Bodvarsson, G.S.,   et al.   ; Wu, Y.S.; Lu, G.; Zhang, K.;     Show all 4 Authors
Source:
Vadose zone journal 2004 v.3 no.3 pp. -
ISSN:
1539-1663
Subject:
waste disposal; radionuclides; simulation models; soil pollution; hazardous waste; pollutants; porous media; unsaturated flow; vadose zone; tuff; soil water movement; Nevada
Abstract:
... We present a large-scale modeling study characterizing fluid flow and tracer transport in the unsaturated zone (UZ) of Yucca Mountain, Nevada, the proposed underground repository site for storing high-level radioactive waste. The modeling study is conducted using a three-dimensional numerical model, which incorporates a wide variety of field data and takes into account the coupled processes of flo ...

7. Simulating infiltration tests in fractured basalt at the Box Canyon Site, Idaho

Author:
Bodvarsson, G.S.,   et al.   ; Unger, A.J.A.; Faybishenko, B.; Simmons, A.M.;     Show all 4 Authors
Source:
Vadose zone journal 2004 v.3 no.1 pp. -
ISSN:
1539-1663
Subject:
simulation models; porosity; infiltration (hydrology); hydrogeology; basalt; hydrologic models; saturated flow; Idaho
Abstract:
... The results of a series of ponded infiltration tests in variably saturated fractured basalt at Box Canyon, Idaho were used to build confidence in conceptual and numerical modeling approaches used to simulate infiltration in fractured rock. Specifically, we constructed a dual-permeability model using TOUGH2 to represent both the matrix and fracture continua of the upper basalt flow at the Box Canyo ...