Quantitative criteria for the use of these analytical solutions are formulated in terms of the source-bed transmissivity and the distance from the well to prescribed-head boundaries other than the stream.
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The head of constant head boundary has also been calibrated in steady-state condition.
This was accomplished by reducing all of the model's constant-head boundary values.
A constant head boundary has been used for the Lake Nyasa shore line (Fig. 5).
In addition, the variable head boundary between −16 and −22 m asl is assigned in SW direction.
The constant head boundary has also been calibrated in the steady-state condition to incorporate the inflow from adjacent aquifer.
Four kinds of boundary conditions must be applied, first of which is a hydraulic head boundary condition [units is (L ], applied to define hydraulic head to node.
More importantly, analytical solutions developed could serve as a tool for calibrating the two boundary parameters defined in the general-head boundary condition for site-specific assessments.
Based on the fact that the boundaries should be taken remote enough from the effect of well fields to be considered as constant head boundaries (Gad 2010), the constant head boundary of 4 m asl is assigned in the NW SE direction parallel to the general fault (F6) which separates MAIWF from the adjacent Pleistocene aquifer.
The closed-form solution for the hydraulic head, derived for the radial groundwater flow equation subject to the constant-head boundary condition at the wellbore, is in an integral form that covers an integration range from zero to infinity.
