Flow to horizontal and slanted drains in anisotropic unconfined aquifers

The Laplace-transformed solution for the problem of flow to horizontal and slanted drains in. an anisotropic unconfined aquifer is provided. The point source solution is integrated and normalised to obtain the drawdown of a finite length drain. Additionally; the Laplace domain solution is converted to the real time domain and type curves for the drawdown around, and the discharge to, horizontal and slanted drains at any given tune are computed. The sensitivity of type curves on piezometer location, specific storage, horizontal drain elevation, aquifer delay index, slanted well slope angle and drain length is tested. Also, the variation of the flow to the drains for different drain lengths and slope angles is derived. These type curves can be used for interpretation of drainage data.