The first two input fields in the Aquifer pathway dialog describe the overall geometry of the pathway.
Length: This is the length of the pathway. Note that the length can change dynamically to represent processes such as erosion.
Area: This is the total cross-sectional area of the pathway. If an infill medium is specified, it fills the area.
Note: If a non-zero Source Zone Length is defined, the Aquifer Length and Area must be static (cannot change dynamically).
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