Two-dimensional geoelectrical imaging across a septic tank

The septic tank system is one of the most common, cheapest and most suitable means of sewage disposal in developing countries. The tank is constructed to store faeces and other solid materials, while the excess water is displaced into a seepage or soakaway pit. The soakaway pit is designed to permit the effluents to seep into the surrounding soil readily. In this paper, the use of numerical modellig and inversion of apparent resistivity data to simulate the environmental imapct of a septic tank (and the effluents emanating from it) on the environment is reported.