cl_maintenanceAndUpdateFrequency

asNeeded

382 record(s)
 
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    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

  • The spawning grounds of the sea lamprey Petromyzon marinus are located within the perimeter of the Sélune Observatory. As this species is migratory, its colonisation of the Sélune river and its tributaries will probably be influenced by the removal of the Sélune dams. The spawning grounds are characterised by a depression accompanied by a sediment ejection dome immediately downstream. The stones returned to the dome are lighter, making the nests easily visible and identifiable for up to several weeks after spawning.

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    Objectives : Impact of the urbanisation of lands on the atmospheric temperature inside woodlots distributed along a rural-urban gradient (Rennes, Brittany, France). Method: Tinytags. Time series.

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    Objectives : Impact of the urbanisation of lands on carabid beetles' communities. Method: censuses (from may to july) of carabid beetles' communities of small woodlots distributed from the center of the city of Rennes to its more rural surroundings. Time series.

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    The dataset includes BLUM and long base tiltmeter data.

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    This dataset includes vadose zone data (temperature,water content and suction) and flux tower data (air pressure,air specific humidity,air temperature,co2 flux,evapotranspiration,h2o flux,latent heat flux,wind direction,wind speed).

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    This borehole hydrogeophysical logging data include optical imaging,acoustic logging,induction and electrical resistivity,natural and spectral gamma radioactivity,fiber optic measurements and multiparameter probe logs.

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    This dataset includes vadose zone data (temperature,water content and suction) and flux tower data (air pressure,air specific humidity,air temperature,co2 flux,evapotranspiration,h2o flux,latent heat flux,wind direction,wind speed).

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    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.

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    This borehole hydrogeophysical logging data include optical imaging,acoustic logging,induction and electrical resistivity,natural and spectral gamma radioactivity,fiber optic measurements and multiparameter probe logs.