Jonkershoek Valley - South Africa

Basic Information
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Site Name
Jonkershoek Valley
Short name
JNHK-V
Country
South Africa
Web Address
SAEON Fynbos Node/Table Mountain Chain
Operating Organisation
South African Environmental Observation Network (SAEON)
Site Description
The Jonkershoek Valley site is located in a mountain catchment in the Cape Floristic Region and is the source of the Eerste River. The site was originally dominated by Boland Granite fynbos and Kogelberg Sandstone fynbos with patches of afrotemperate forest. From the 1930s, first order catchment experiments were established in the valley by the Jonkershoek Forestry Research Centre (JFRC) under the auspices of the South African Forestry Research Institute (SAFRI). The catchments were sequentially planted to pine species. Gauged weirs were built in the experimental catchments. Long term records exist for five gauged pine planted catchments and one natural fynbos catchment. The Swartboskloof catchment, located in the Jonkershoek ...
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Last modified
2020-06-29 10:06:17

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General Characteristics and Status
Site Status
Operational
Year Established
1935
Observed properties
water parameteratmospheric parameterchemical parameterecosystem parameterrunoffamountwaterlevelwaterqualitywatertemperatureatmosphericpressureprecipitationintensitysuspendedsolidsspeciesturnover
Affiliation and Network Specific Information
Affiliation
ILTER✔This site is a verified "ILTER" member.
SAEON✔ (LTER-SAF-ZA-11)This site is a verified "SAEON" member.
GERI✔This site is a verified "GERI" member.
Projects
UNESCO World Heritage Site
Photos
not defined
not defined
Geographic
Marker
300 km
200 mi
View in site map
Centroid/Representative Coordinates

Latitude: -33.979355 Longitude: 18.950891

Size
ca. 14635.00ha
Elevation (average)
880.00msl
Elevation (min)
239.00msl
Elevation (max)
1560.00msl
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Site information [.json]

Centroid/representative coordinates [.shp] [.kml]
GEO-BON Biome
Fresh water rivers
Terrestrial
Biome
Fresh Water Rivers
Ecosystem Type
Agricultural
Rivers
Large river headwaters
EUNIS habitat
Habitat complexes (X)
Habitat complexes (X) » Intensively-farmed crops interspersed with strips of natural and/or semi-natural vegetation (X07)
Air Temperature: Average Annual
14.60°C
Precipitation Annual
893.89mm
Geology
Sandstone and quartzite with intermittent shale bands of Table Mountain Group, underlain by Cape granite
Vegetation
The site is predominantly fire-prone mountain fynbos. Riparian zones and screes are dominated by afrotemperate forest
Soils
Mixed colluvial soils with major forms being Hutton, Magwa and Nomanci. They are acid sandy loams, low in organic matter and phosphorus. Soils have high infiltration capacity and are well-drained
Hydrology
Jonkershoek valley falls in a predominantly winter rainfall (April to September) regime with 75 % of annual rain falling in this period. Streamflow has been measured from 6 catchments in the valley from 1938
Site Type
Platform
Design of Experimentation
no experimentation
Scale of Experimentation
not applicable
Design of Observation
mainly observation
Scale of Observation
entire catchment
Permanent Power Supply
Yes
Equipment
Data infrastructure » Data services » Data portal
Data infrastructure » Data storage » XML database
Energy and data transmission infrastructure » Data transmission » Data Transmission Type (from site) » Other transmission types
Accessible All Year
Yes
All parts of Site Accessible
Yes
Access Type
dirt road (4WD)
Permanent Operation
Yes
Site Visit Interval
30
Maintenance Interval
30
General Data Policy
Formal acknowledgement of the dataset providers
Data Policy URL
http://saeon.dirisa.org/management/it-governance/G373.2%20Policy%20and%20Guidel…
LTER Site Classification
Master