Assessing the Hydraulic Conductivity Anisotropy and Skin-Effect Based on Data of Slug Tests in Partially Penetrating Wells

A semianalytic and approximate analytical solution is given to the problem of slug test in a partially penetrating well in a confined or unconfined anisotropic aquifer. An asymptotic solution is given to the problem of slug test in a partially penetrating well in an unconfined aquifer. The latter solution, unlike the semiempiric Bouwer–Rice method, takes into account hydraulic conductivity anisotropy and skin effect. Levenberg–Marquardt algorithm was used to develop a method for determining hydraulic conductivity anisotropy and skin effect based on data of slug tests in partially penetrating wells in confined or unconfined aquifer.