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 (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

Source https://deims.org/731f3ced-148d-4eb5-aa46-870fa22be713
Related Identifier https://deims.org/geoserver/deims/wms?service=WMS&version=1.1.0&request=GetMap&layers=deims:deims_all_sites&styles=&bbox=-180,-90,180,90&width=768&height=363&srs=EPSG:4326&format=application/openlayers
Metadata Access https://deims.org/api/sites/731f3ced-148d-4eb5-aa46-870fa22be713
Publisher CNRS - University Rennes 1
Contributor DEIMS-SDR Site and Dataset registry deims.org
Publication Year 2016
Rights No conditions apply to access and use; no limitations to public access
OpenAccess true
Contact office(at)lter-europe.net
Language English
Format text/html
Discipline Environmental Research; Geosciences; Land Use; Natural Sciences
Spatial Coverage (-3.510W, 47.733S, -3.413E, 47.776N)