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发表于 2016-8-6 23:41:08
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常用的专业词语:
manual-守则
phreatic surface --浸润面面
;precipitation--仓促;
infiltration-渗透
saturated -饱和
infiltration of precipitation. The transient feature allows you to analyze such problems as the migration of a wetting front and the dissipation of excess pore-water pressure. The following lists the analysis types possible with SEEP/W:
Modelling of saturated and unsaturated flow systems.
SEEP/W is rigorously formulated with hydraulic conductivity and water content as a function of pore-water pressure, thus giving a seamless transition from the saturated to the unsaturated zone(非饱和) in the model. Saturated flow is simply a special case of this formulation, and as such, SEEP/W can model groundwater flow in confined systems.
Steady-state and transient analyses.
Many seepage problems can be adequately modelled using steady-state groundwater flow. In other cases, transient groundwater flow is required. SEEP/W can compute steady state or transient groundwater flow.
Two-dimensional plane or axisymmetric geometry.
The two-dimensional plane geometry is useful for modelling seepage in two-dimensions, such as a vertical cross-sectional plane or a plan view of the system. Axisymmetric geometry is useful for situations where there is symmetry about a vertical axis, such as near a single vertical well.
Boundary Conditions(边界条件)
Multiple boundary condition types.(多类型边界条件)
Multiple boundary condition types are implemented to support virtually all seepage modelling scenarios. In SEEP/W, total head, nodal seepage flux and area seepage flux may be specified.
边界条件内型: 水头边界条件,流量边界,
Transient boundary conditions.(崭态边界条件)
A boundary condition function may be associated with each boundary condition. This feature us useful for specifying boundary conditions that vary with time. In addition, transient boundary conditions may be cycled, allowing specification of transient boundary conditions that repeat themselves with some frequency.
Review boundaries.(检查边界条件)
For certain types of seepage problems, the boundary conditions are a function of the flow process. An example of this is when groundwater leaves the flow system on a seepage face, such as exiting from a slope. Below the point where the phreatic surface intersects the slope, groundwater will exit the seepage face. Above this point, the soil may be wet, but water will not exit because the pore-water pressures are negative with respect to atmospheric pressure.
In these cases, the types of boundary conditions, (specified head or zero flux), to be applied to the seepage face must be solved for using an iterative procedure similar to that required to solve the nonlinear finite element equations. Using the review boundary feature, it is possible for SEEP/W to automatically determine the correct boundary conditions on the seepage face boundary.
Head as a function of volume.
For problems where groundwater is recharged from and discharging to a reservoir with fluctuating levels, the head boundary condition at the reservoir is a function of the reservoir level. To facilitate the application of boundary conditions in these cases, SEEP/W allows head boundary conditions to be a function of the volume of groundwater flow into or out of the system through the group of nodes along the reservoir boundary.
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