SVFlux 2D Overview Cutoff This problem illustrates the ability of the SVFlux solver to refine the mesh in difficult areas in the problem. Two such areas in this problem include the area surrounding the tip of the cutoff itself as well as at the downstream toe of the concrete dam. In both of these areas the SVFlux solver recognized that the gradients in these areas would be high and it refined the mesh to account for this. The contours in the plot represent the solution of the head throughout the problem. Streamtraces are also included to show the direction of flow. The depth of the reservoir was modeled to be 60m Dimmensions: 150m X 40m : Defined: 10 min. : Solved: 1 sec. : Nodes: 841 : Cells: 338 : Error: .0008 Infiltration SVFlux easily handles cases where a problem may undergo infiltration due to a variable or constant flux source. The above case illustrates a slope that has a constant flux rate. Within a transient problem you may write an equation to describe a change in the flux rate with respect to time or head. The following equation would be accepted by SVFlux and specify a rainfall that started at a rate of 2.1e-04 m3/s decreasing to a rate of zero after a 24 hour period. If t <= 24 then -8.75e-06 * t + 2.1e-04 else 0. Defined: 20 min. : Solved: 2 sec. : Nodes: 2212 : Cells: 92 : Error: .006 Unconfined Flow In the above picture the saturated and unsaturated portions of the problem are separated by the contour the black triangles are pointing to. A triangle is the standard symbol used to define a water table in any problem. The flow vectors clearly illustrate that there is flow within the unsaturated region in the problem. It is important that SVFlux accounts for the flow in the unsaturated region as this can be a significant component of the total flow through the problem. Dimensions: 52m X 12m : Defined: 25 min. : Solved: 1 sec. : Nodes: 510 : Cells: 227 : Error: .0009 Flushing Wells This example illustrates how SVFlux will determine the overall flow regime in a problem. The well on the right is an injection will while the well on the left is a pumping well. The blue area represents saturated region and shows the effect the wells have on the water table throughout the problem. It can be seen that the water table rises around the injection well while it is lowered around the pumping well. Flow vectors have been included to help visualize the flow of water in the problem. Defined: 10 min. : Solved: 1 sec. : Nodes: 777 : Cells: 354 : Error: .0009 Dam and Valley This problem illustrates the pressures resulting from a dam including a filter and reservoir in a valley. The problem shows how effective SVFLUX is at describing irregular surfaces that occur in natural geology. It also shows the ability you have to separate portions of the problem to examine smaller areas in more detail. Dimensions: 250m X 160m X 85m : Defined: 45 min. : Solved: 33 sec. : Nodes: 6593 : Cells: 3982 : Error: .002 Pond Infiltation Pond Infiltration illustrates the capability of SVFLUX to handle problems that have infiltration from reservoirs or other standing water supplies. When water overlies a water table, it is not mandatory that the soil between the initial water table and the reservoir become saturated. As time progresses the soil will become saturated, however, in this case the problem has not reached that point and the water table is only mounding towards the level of the reservoir. The horizontal line and the white phreatic surface marker show the initial water table, at time equal to zero. The black phreatic surface markers show the water table at the end of the problem. Dimensions: 23m X 11m : Defined: 30 min. : Solved: 5 sec. : Nodes: 518 : Cells: 141 : Error: .0007 Draw Down This three dimensional analysis illustrates the effect of pumping a well on the water table beneath a slope. The water table in this example is specified to have the same overall shape as the slope itself with an elevation of 30m on the uphill side of the problem and an elevation of 20m on the downhill side. This plot illustrates the shape of the draw down cone resulting from pumping including streamtraces to show the overall direction of the flow throughout the problem. The blue contours show the pressure distribution in the saturated region of the problem while the red contours show the pressure distribution in the unsaturated region. Dimensions: 50m X 50m X 60m : Defined: 30 min. : Solved: 51 sec. : Nodes: 12104 : Cells: 7661 : Error: .0009 SVFlux Example Problems SVFlux is extremely versatile in solving a wide range of seepage-related problems. The purpose of this web page is to provide a group of typical problems which may be solved using the SVFlux software. SVflux 3D - seepage software SVflux 3D Category - seepage analysis |
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