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Semi-infinite aquifer

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Semi-infinite aquifer

Semi-infinite aquifer

 

Assumptions:

aquifer is confined, anisotropic on the vertical plane, of semi-infinite extent and thickness;

boundary is vertical or lateral, straight, of infinite length;

drawdown in the aquifer can be calculated at any distance from the pumping well.

 

Two kinds of boundary conditions are considered: 1) lateral recharge boundary (Dirichlet); 2) lateral or profile no-flow boundary (Neumann).

 

a                b                c        d

Schematic cross-sections of semi-infinite aquifer.

a – profile boundary – top of the aquifer; b – profile boundary – bottom of the aquifer; c – lateral recharge boundary; d – lateral no-flow boundary.