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Partially penetrating well: LINEAR SOURCE IN A CONFINED AQUIFER
Pumping and observation wells are partially penetrating. The length of the pumping well screen is less than aquifer thickness. The aquifer is, by default, anisotropic (Kz is different from Kr), however the presented formulas in this chapter, for simplicity, describe isotropic aquifer. Drawdown can be calculated for observation wells and piezometers (i.e. small diameter pipe that is open only at its bottom).
In case of anisotropic aquifer the following substituting should be made:
Conceptual schemes
Aquifer of infinite extent and thickness
Combination of a recharge and a no-flow boundaries