In 2009, the excavation of a Roman shaft in the northeast of the town of Béziers (34) resulted in an underground tunnel dug in the Miocene molasses. The whole reception a perched water table and harvested percolation fine droplets contained in the sandstone aquifer. In 2011, two new Roman shafts were excavated a few hundred meters further north. Again, the archaeological work shows a similar pattern of operation. Already observed in the last century in some archaeological publications Biterroises this operating technique of groundwater wells gallery knows many similarities with the structures identified in Roman pole and larger scale throughout the Mediterranean. These millennia-hydraulic systems are grouped under the generic term «qanat » ...