OZCAR-RI H+ Larzac - France

Basic Information
Site Name
OZCAR-RI H+ Larzac
Short name
H+_LZ
Country
France
Web Address
Network of hydrogeological research sites
Operating Organisation
UMS3282 OSU-OREME
UMR5243 GEOSCIENCES MONTPELLIER
Site Manager
Cedric Champollion
Funding Agency
Région Occitanie
French seismological and geodetic network (RESIF)
Université de Montpellier
Agence Nationale de la Recherche (ANR)
Site Description
It is located in the region of the Grand Causses, south of the Massif Central. The karstic aquifer of Durzon represents a surface of 100 km² which feeds the spring of Durzon. This spring supplies the drinking water of the Aveyron part of Larzac. The observatory has a set of sites dedicated to gravimetric, inclinometric and hydro-geodesic observations, as well as a flow tower for evapotranspiration measurements.
Relationships to other sites
This site belongs to:
Last modified
2024-09-09 08:09:48

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General Characteristics and Status
Site Status
Operational
Year Established
2010
Observed properties
Affiliation and Network Specific Information
Affiliation
ILTER✔This site is a verified "ILTER" member.
OZCAR RI✔This site is a verified "OZCAR RI" member.
LTER Europe✔This site is a verified "LTER Europe" member.
LTER France✔ (CZO_EU_FR_202)This site is a verified "LTER France" member.
Critical Zone Collaborative Network (CZ Net)✖The affiliation of this site with "Critical Zone Collaborative Network (CZ Net)" is not verified by the network on DEIMS-SDR.
Projects
eLTER PLUS (H2020) - RA
eLTER PLUS (H2020) - TA
Photos
Building of the Larzac Observatory in dry autumn conditions
Building of the Larzac Observatory in dry autumn conditions
Geographic
View in site map
Centroid/Representative Coordinates

Latitude: 43.970038 Longitude: 3.221694

Size
ca. 100000.00ha
Elevation (average)
750.00msl
Elevation (min)
800.00msl
Elevation (max)
700.00msl
Download

Site information [.json]

Centroid/representative coordinates [.shp] [.kml]
Bounding Box [.shp] [.kml]
Boundaries [.shp] [.kml]
GEO-BON Biome
Terrestrial
Biome
Grasslands
Ecosystem Type
Grasslands
Temperate grasslands, savannas, and shrublands
Biogeographical Region
Mediterranean Bio-geographical Region
EUNIS habitat
Grasslands and lands dominated by forbs, mosses or lichens (E)
Grasslands and lands dominated by forbs, mosses or lichens (E) » Alpine and subalpine grasslands (E4)
Grasslands and lands dominated by forbs, mosses or lichens (E) » Alpine and subalpine grasslands (E4) » Calcareous alpine and subalpine grassland (E4.4)
Air Temperature: Average Annual
12.00°C
Precipitation Annual
1000.00mm
Geology
Durzon is composed of karstified carbonates of the Jurassic. Two thick series can be found on this causse: the series of the Hettangian (from a total power from 50 to 300 m) and the series from Dogger to Malm (with a total power up to 600 m). These two series are separated by a marl series (black and laminated marls) deposited at the Domérien and Toarcien. They play an important role in the hydrology of the Duzon by constituting respectively a waterproof barrier and base.
Vegetation
The vegetation is essentially reduced to low grass, with low transpiration and shallow setting
Soils
Soil depth is too heterogeneous in our karstic site to provide one parameters and we do not have a complete map. All the parameters of the soil are not well adapted to our site.
Hydrology
Located at an altitude of 533m, the source of the Durzon will deliver an average discharge of 1.5 m3/s over the period 2008 to 2014. The min discharge may reach 0.7 m3/s as in the summer 2011 and the max discharge may reach until 16 m3/s.
The bassin area is estimated between 98 and 117 km2 depending on the authors and based on a mass bilan.
Overflows of many of the surrounding epikarst aquifers during extreme events can lead to the formation of temporary lakes.
Protection Level (IUCN category)
Category V – Protected Landscape/Seascape/Area
Site Type
Stationary land-based site
Design of Experimentation
mainly experimentation
Scale of Experimentation
beyond catchment scale
Design of Observation
mainly observation
Scale of Observation
beyond catchment
Permanent Power Supply
Yes
Equipment
Observation devices » Measurement tower » Less than 10 m above canopy
Observation devices » Temperature Controlled Container
Data infrastructure » Data services » Web Map Service (WMS)
Data infrastructure » Data services » Other data services
Data infrastructure » Data services » Data portal
Data infrastructure » Data storage » Structured file
Data infrastructure » Data storage » Spatial database (GIS)
Data infrastructure » Data storage » Spatial data file (GIS)
Data infrastructure » Data storage » Relational database
Data infrastructure » Data storage » Proprietary file format
Supporting infrastructure » Lodging at site » No lodging possible
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (from site) » Cable based
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (from site) » Telephone line
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (from site) » Radio transmission system (repeaters. receivers. centralstation)
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (from site) » GMS/UMTS
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (within site) » Telephone line
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (within site) » Radio transmission system (repeaters, receivers, centralstation)
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (within site) » GMS/UMTS
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (within site) » Cable based
Energy and data transmission infrastructure » Energy supply » Permanent Power Supply Location » Central station(s)
Accessible All Year
Yes
All parts of Site Accessible
Yes
Access Type
regular car
Permanent Operation
Yes
Site Visit Interval
30
Maintenance Interval
30
General Data Policy
Formal acknowledgement of the dataset providers
The opportunity to collaborate on the project using the dataset
LTER Site Classification
Master
There is EURO-CORDEX climate scenario data available for this site:
Projected Near Surface Specific Humidity ChangeRCP26RCP45RCP85
Projected Precipitation ChangeRCP26RCP45RCP85
Projected Sea Level Pressure ChangeRCP26RCP45RCP85
Projected Surface Downwelling Shortwave RadiationRCP26RCP45RCP85
Projected Near-Surface Wind SpeedRCP26RCP45RCP85
Projected Near-Surface Air TemperatureRCP26RCP45RCP85
Projected Daily Maximum Near-Surface Air TemperatureRCP26RCP45RCP85
Projected Daily Minimum Near-Surface Air TemperatureRCP26RCP45RCP85

You can also download the entire climate scenario dataset for this site from the EUDAT B2SHARE data store.