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## Conceptual models > Constant-head test >## One well pumped at a constant drawdown |

Analytical equations and methods for aquifer test analysis

Unsteady-state flow equations 1. Solution for nonleaky aquifer (aquifers of infinite lateral extent) Laplace transform solution:
Alternative non-steady state equation for nonleaky aquifer (Sternberg) (aquifers of infinite lateral extent) Simplified solution for nonleaky aquifer(Mishra–Guyonnet) (aquifers of infinite lateral extent) 2. Solution for leaky aquifer (aquifers of infinite lateral extent) Laplace transform solution:
Alternative non-steady state equation for leaky aquifer (Sternberg) (aquifers of infinite lateral extent) 3. Radially heterogeneous aquifer main zone Laplace transform solution:
wellbore zone где
Laplace transform solution:
3. Unconfined aquifer (Laplace transform solution) piezometer zp = LTp. Fully penetrating observation well
Methods of analysis and parameters being estimated
For leaky aquifer case, leakage factor B is included in parameters matching. For radially heterogeneous aquifer – T1, a1, T2, a2 |