Seepage Modeling with SEEP/W - GeoStudio 2007 version 7.22

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Table of Contents SEEP/W Triangular grid regions ................................................................................................ 36 Rectangular grid of quads .......................................................................................... 37 3.4 Surface layers 37 3.5 Joining regions 40 3.6 Meshing for transient analyses 41 3.7 Finite elements 42 3.8 Element fundamentals 43 Element nodes ............................................................................................................ 43 Field variable distribution ............................................................................................ 43 Element and mesh compatibility ................................................................................. 44 Numerical integration .................................................................................................. 46 Secondary variables ................................................................................................... 47 3.9 Infinite regions 47 3.10 General guidelines for meshing 49 Number of elements ................................................................................................... 49 Effect of drawing scale ............................................................................................... 50 Mesh purpose ............................................................................................................. 50 Simplified geometry .................................................................................................... 52 4 Material Models and Properties ........................................................ 53 4.1 Soil behavior models 53 Material models in SEEP/W ....................................................................................... 53 4.1 Soil water storage – water content function 54 Factors affecting the volumetric water content ........................................................... 56 4.2 Storage function types and estimation methods 56 Estimation method 1 (grain size - Modified Kovacs) .................................................. 57 Estimation method 2 (sample functions) .................................................................... 59 Closed form option 1 (Fredlund and Xing, 1994) ....................................................... 60 Closed form option 2 (Van Genuchten, 1980) ............................................................ 61 4.3 Soil material function measurement 62 Direct measurement of water content function ........................................................... 62 4.4 Coefficient of volume compressibility 63 4.5 Hydraulic conductivity 64 4.6 Frozen ground hydraulic conductivity 66 4.7 Conductivity function estimation methods 68 Method 1 (Fredlund et al, 1994) ................................................................................. 68 Method 2 (Green and Corey, 1971) ........................................................................... 69 Page ii
SEEP/W Table of Contents Method 3 (Van Genuchten, 1980) .............................................................................. 70 4.8 Interface model parameters 71 4.9 Sensitivity of hydraulic results to material properties 72 Changes to the air-entry value (AEV)......................................................................... 72 Changes to the saturated hydraulic conductivity ........................................................ 74 Changes to the slope of the VWC function ................................................................ 76 Changes to the residual volumetric water content ..................................................... 78 5 Boundary Conditions ........................................................................ 80 5.1 Introduction 80 5.2 Fundamentals 80 5.3 Boundary condition locations 82 Region face boundary conditions ............................................................................... 83 5.4 Head boundary conditions 83 Definition of total head ................................................................................................ 83 Head boundary conditions on a dam .......................................................................... 85 Constant pressure conditions ..................................................................................... 87 Far field head conditions ............................................................................................ 87 5.5 Specified boundary flows 88 5.6 Sources and sinks 91 5.7 Seepage faces 92 5.8 Free drainage (unit gradient) 94 5.9 Ground surface infiltration and evaporation 95 5.10 Far field boundary conditions 97 5.11 Boundary functions 98 General ....................................................................................................................... 98 Head versus time ........................................................................................................ 99 Head versus volume ................................................................................................. 101 Nodal flux Q versus time .......................................................................................... 102 Unit flow rate versus time ......................................................................................... 103 Modifier function ....................................................................................................... 104 6 Analysis Types ................................................................................ 107 6.1 Steady state 107 Boundary condition types in steady state ................................................................. 108 6.2 Transient 108 Initial conditions ........................................................................................................ 108 Drawing the initial water table .................................................................................. 110 Page iii
Page 1 and 2: Seepage Modeling with SEEP/W An Eng
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SEEP/W Chapter 3: Geometry and Mesh
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SEEP/W Chapter 4: Material Models a
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2 SEEP/W Chapter 4: Material Models
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Chapter 6: Analysis Types SEEP/W ON
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Chapter 6: Analysis Types SEEP/W Fi
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Chapter 6: Analysis Types SEEP/W Fi
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Chapter 6: Analysis Types SEEP/W 6.
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Chapter 6: Analysis Types SEEP/W se
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Chapter 7: Functions in GeoStudio S
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Chapter 8: Numerical Issues SEEP/W
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15 Chapter 9: Flow nets, seepage fo
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Chapter 9: Flow nets, seepage force
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Chapter 11: Modeling Tips and Trick
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Chapter 12: Illustrative Examples S
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Chapter 13: Theory SEEP/W k x k y Q
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Chapter 13: Theory SEEP/W L = a des
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Chapter 13: Theory SEEP/W Table 13-
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Chapter 13: Theory SEEP/W [ C] = wh
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Chapter 13: Theory SEEP/W { Q} = q
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Chapter 13: Theory SEEP/W Figure 13
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Chapter 13: Theory SEEP/W Page 184
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References SEEP/W Figure 14-1 Globa
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References SEEP/W In equation form,
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References SEEP/W Table 14-4 Interp
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References SEEP/W Burland J.B. 1996
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References SEEP/W Swanson, D. 1991.
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SEEP/W Index Adaptive time stepping
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SEEP/W Seepage faces ..............
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Seepage Modeling with SEEP/W - GeoStudio 2007 version 7.22

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