The Ploemeur-Guidel observatory (Britanny, France) is focusing on surface-depth relationships in a fractured crystalline geological context and oceanic climate. It is built on 2 sub-sites, one highly anthropized, the other in natural state. In Ploemeur, groundwater has been pumped since 1991, supplying more than 1 million m3 of clean drinking water annual at a sustainable rate. Such high productivity is explained the specific fractured network in granite and micaschists, draining deep geological layers (~400 m). Extracted water quality is very good, with limited nitrate concentration, in a region that has been strongly affected by widespread pollution. Guidel site is in a similar, but natural context. Deep iron-rich groundwater is upflowing, creating surface and deep groundwater-dependent ecosystems, and feeding a classified coastal wetland. Both sites have a very dense equipment to study rapid to long-term surface-depth exchanges: a flux tower, unsaturated zone monitoring, a network of ~50 shallow (<10m) and deep boreholes (>80m), hydrochemical, temperature and deformation. An well-characterized fractured experimental site offers the possibility to conduct experiments to test innovative instruments and develop new methodologies

Available data include monitoring data (weather parameters,piezometric levels and pumping flow rates).

Available data include monitoring data (weather parameters,piezometric levels and pumping flow rates).

Available dataset includes monitoring data anions,cations,dic,doc,dissolved gases and isotopes

Available data include monitoring data (flow rates in springs or tunnels,weather parameters,piezometric levels and pumping flow rates).

Available data include monitoring data (weather parameters,piezometric levels and pumping flow rates).

Available data include monitoring data (weather parameters,piezometric levels and pumping flow rates). Note that soil and flux tower parameters are available in the dataset Soil-atmosphere exchange.

Available dataset includes monitoring data anions,cations,dic,doc,dissolved gases and isotopes

Available data include monitoring data (weather parameters,piezometric levels and pumping flow rates).

Available data include monitoring data (weather parameters,piezometric levels and pumping flow rates).