This technical report illustrates preliminary results of lysimeter experimentation. Tests concern a pyroclastic soil sample of Nocera Inferiore that involved in a rapid flowslide on 4th of March 2005. By means of its behaviour real-time monitoring, it will be possible to define exactly properties of soil and to understand how it responds to rainfalls, in terms of water pressure and volumetric water content of the soil. In order to validate and to interpret lysimeter outputs, a mathematical model of lysimeter is developed using the software SEEP/W. Seepage analyses studying can give more information about hydraulic properties of the soil sample, so it can be useful to understand the sequence of events occurred on 4th March 2005.