The filtrating pipes are installed in different drillings executed in the same reduced area, separated from the coastline the distance specified by administrative and urban provisions, by drilling the subsoil towards offshore up to the aquifer geological formation previously selected. This permeable formation, due to porosity and/ or fracturization, ensures the permanent recharge of the sea-aquifer, as well as the continual extraction of large flows of water.
The open intake allows seawater intake by means of inlet pipes of large diameters and lengths (several kilometers), to get to 30-60m bathymetry. In such depth the water has perfect physic-chemical conditions suitable for its treatment, but it gets exposed to a possible external contamination.
The existence of posidonia prairies and other protected biotopes are an obstacle to execute excavations works and drainages of the seabed. Neodren®, and the Horizontal Directional Drilling technology are the solution for the inlet pipe intake and installation, required in case of abrupt orographies at the seabed
Demographic and urban growths make coastal freshwater aquifers be under high pressure due to water extractions through vertical wells. Their depletion entails intrusion of seawater into them and therefore the freshwater collection system fails.
Water supply for desalination plants via vertical wells placed by the seashore affects the contact surface between continental freshwater and seawater. Neodren® avoids freshwater collection and affection, since filtering stretches are exclusively places under the seabed, far away from the fresh-seawater interphase.
Seawater collection in low-permeability aquifers does not supply large water flows. This entails drilling more vertical wells.
Neodren®, as it is installed under the seabed and is recharged continuously, maximises flow-yield
Pol. Ind. Santa Anna I, km. 4,2
08251 Santpedor - Barcelona (Spain)