OZCAR-RI OHGE Strengbach Watershed OHGE Observatoire Hydro-Géochimique de l'Environnement - France

Basic Information
Site Name
OZCAR-RI OHGE Strengbach Watershed OHGE Observatoire Hydro-Géochimique de l'Environnement
Short name
OHGE
Country
France
Web Address
http://ohge.unistra.fr
Operating Organisation
Université de Strasbourg
Site Manager
Pierret Marie-Claire
Site Description
The Strengbach Watershed is a granitic watershed (80ha) located in NE of France, in the Vosges Mountains at altitudes between 880 and 1150 m (omsl) and with highly incised side slopes (mean 15°). This catchment is situated in a remote area lacking human activities except forest management. The forest covers 90% of the area and corresponds about to 80% spruce (mainly Piceas Abies L.) and 20% beech (Fagus Sylvatica). The climate is temperate oceanic mountainous. The site is managed by Ecole et Observatoire des Sciences de la Terres (University of Strasbourg / CNRS-INSU-France).
Last modified
2025-04-28 10:04:57

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General Characteristics and Status
Site Status
Operational
Year Established
1986
Observed properties
chemical parameteratmospheric parameterwater parameterammoniumnitrateconcentrationbasecationscontentinwaterchemicalcompositionofwaterdissolvedorganiccarboninwaterpHvalueofwaterwateraciditywateralkalinityairhumidityairtemperaturesolarradiationwinddirectionwindspeedelectricalconductivityrainfallvariabilitysurfacerunoffwateralkalinitywatertemperature
Affiliation and Network Specific Information
Affiliation
OZCAR RI✔This site is a verified "OZCAR RI" member.
LTER Europe✔This site is a verified "LTER Europe" member.
GERI✔This site is a verified "GERI" member.
LTER France✔ (CZO_EU_FR_120)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 catalogue
SoilTrEC
Photos
not defined
not defined
Geographic
300 m
1000 ft
View in site map
Centroid/Representative Coordinates

Latitude: 48.213914 Longitude: 7.196789

Size
ca. 79.64ha
Elevation (average)
1000.00msl
Elevation (min)
850.00msl
Elevation (max)
1150.00msl
Related location(s)
Download

Site information [.json]

Centroid/representative coordinates [.shp] [.kml]
Bounding Box [.shp] [.kml]
Boundaries [.shp] [.kml]
GEO-BON Biome
Terrestrial
Biome
Deciduous Forest
Ecosystem Type
Forest
Deciduous Forest
Temperate coniferous forests
Rivers
Small rivers
Biogeographical Region
Continental Bio-geographical Region
EUNIS habitat
Woodland, forest and other wooded land (G)
Woodland, forest and other wooded land (G) » Coniferous woodland (G3)
Air Temperature: Average Annual
6.00°C
Precipitation Annual
1400.00mm
Geology
The bedrock is mainly composed of Hercynian Ca-poor granite (315 ± 7 Myr), which has been subjected to hydrothermal alterations of various levels with main hydrothermal alterations occurring 183,9 My ago. In addition to granite, which is heavily hydrothermally altered on the south-facing slope and less altered on the north-facing slope, small microgranite and gneiss bodies outcrop along the southern and northern slopes, respectively.
Vegetation
The forest covers 90% of the area with approximately 80% of the area including spruce trees (mainly Piceas Abies L.) and of the area 20% supporting beech trees (Fagus Sylvatica). The catchment is used as a commercially managed forest and plantations range in age from 50 to 145 years. Forest decline related to acid precipitation was observed in the Strengbach Catchment in the 1980s.
Soils
brown acidic to ochreous podzolic soils.
Soils of the watershed are brown acidic to ochreous podzolic and are generally roughly 1 meter thick. The soils are very coarsely grained, sandy and rich in gravel. Soil pH levels range from 3.5 at the surface to 4.5 at 1 m deep.
Hydrology
The mean annual discharge at the outlet for the 1986-2015 period is of about 750 mm (24.5 ls-1km-2) with variations ranging from 494 to 1132 mm/yr. The outlet discharge varied between 1 l/s up to 400 l/s during high flow discharge corresponding particularly to rain events associated with snow melting periods.
Site Type
Stationary land-based site
Design of Experimentation
partly experimentation
Scale of Experimentation
plot scale
Design of Observation
mainly observation
Scale of Observation
entire catchment
Permanent Power Supply
Yes
Equipment
Maintenance infrastructure » Snow clearing equipment
Observation devices » Measurement tower » No tower on site
Data infrastructure » Data services » Data portal
Data infrastructure » Data storage » Paper
Data infrastructure » Data storage » XML database
Supporting infrastructure » Staff room at site » 2 - 5 places
Supporting infrastructure » Lodging at site » No lodging possible
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (from site) » Telephone line
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (within site) » Telephone line
Energy and data transmission infrastructure » Energy supply » Permanent Power Supply Location » Central station(s)
Accessible All Year
No
All parts of Site Accessible
No
Access Type
dirt road (4WD)
Permanent Operation
No
Site Visit Interval
14
Maintenance Interval
14
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.