{"title":"Jonkershoek Valley - South Africa","id":{"prefix":"https:\/\/deims.org\/","suffix":"276274c0-e5f4-4f51-aa12-c5008f6e401e"},"type":"site","created":"2012-12-25T19:34:42+01:00","changed":"2025-05-23T13:15:25+02:00","attributes":{"affiliation":{"networks":[{"network":{"name":"GERI","id":{"prefix":"https:\/\/deims.org\/networks\/","suffix":"c3abdc60-49f1-49db-81fe-863b7dbb21d3"}},"siteCode":null,"verified":true},{"network":{"name":"ILTER","id":{"prefix":"https:\/\/deims.org\/networks\/","suffix":"1aa7ccb2-a14b-43d6-90ac-5e0a6bc1d65b"}},"siteCode":null,"verified":true},{"network":{"name":"SAEON","id":{"prefix":"https:\/\/deims.org\/networks\/","suffix":"bce17afa-e548-4410-99d2-4eade740c9a9"}},"siteCode":"LTER-SAF-ZA-11","verified":true}],"projects":[{"label":"UNESCO World Heritage Site","uri":"https:\/\/whc.unesco.org\/en\/about\/"}]},"contact":{"siteManager":null,"operatingOrganisation":[{"type":"organisation","name":"South African Environmental Observation Network (SAEON)","url":"http:\/\/www.saeon.ac.za\/","ror":"https:\/\/ror.org\/041j42q70"}],"metadataProvider":[{"type":"organisation","name":"South African Environmental Observation Network (SAEON)","url":"http:\/\/www.saeon.ac.za\/","ror":"https:\/\/ror.org\/041j42q70"}],"fundingAgency":null,"siteUrl":[{"title":"SAEON Fynbos Node\/Table Mountain Chain","value":"http:\/\/www.saeon-fynbos.org\/#!site-descriptions\/c1mek"}]},"general":{"abstract":"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 valley, was the site of fire experiments in the 1970s and 80s. ","citation":null,"relatedIdentifiers":null,"status":{"label":"Operational","uri":"http:\/\/vocabs.lter-europe.net\/elter_cl\/10772"},"yearEstablished":1935,"yearClosed":null,"relatedSites":null,"siteName":"Jonkershoek Valley","shortName":"JNHK-V","siteType":"Platform","protectionLevel":null,"landUse":null,"images":[{"url":"https:\/\/deims.org\/sites\/default\/files\/photos\/SDC16336.JPG","alt":"not defined"}]},"environmentalCharacteristics":{"airTemperature":{"yearlyAverage":14.6,"monthlyAverage":null,"unit":"\u00b0C","referencePeriod":null},"precipitation":{"yearlyAverage":893.89,"monthlyAverage":null,"unit":"mm","referencePeriod":null},"biogeographicalRegion":null,"biome":"freshwater_rivers","ecosystemType":[{"label":"Agricultural","uri":null},{"label":"Large river headwaters","uri":null},{"label":"Rivers","uri":null}],"eunisHabitat":[{"label":"Habitat complexes (X)","uri":null},{"label":"Intensively-farmed crops interspersed with strips of natural and\/or semi-natural vegetation (X07)","uri":null}],"landforms":null,"geoBonBiome":["Fresh water rivers","Terrestrial"],"geology":"Sandstone and quartzite with intermittent shale bands of Table Mountain Group, underlain by Cape granite","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","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","vegetation":"The site is predominantly fire-prone mountain fynbos. Riparian zones and screes are dominated by afrotemperate forest"},"geographic":{"boundaries":null,"coordinates":"POINT (18.950891 -33.979355)","country":["South Africa"],"elevation":{"avg":880,"min":239,"max":1560,"unit":"msl"},"size":{"value":14635,"unit":"ha"},"relatedLocations":null},"focusDesignScale":{"experiments":{"design":"no experimentation","scale":"na"},"observations":{"design":"mainly observation","scale":"entire catchment"},"observedProperties":[{"label":"atmospheric parameter","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/20937"},{"label":"atmospheric pressure","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22060"},{"label":"ecosystem parameter","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/20939"},{"label":"precipitation intensity","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22204"},{"label":"runoff amount","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/30032"},{"label":"species turnover","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22288"},{"label":"suspended solids","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22293"},{"label":"water level","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/30025"},{"label":"water parameter","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/20945"},{"label":"water quality","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22312"},{"label":"water temperature","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22313"}]},"infrastructure":{"accessibleAllYear":true,"accessType":"dirt road  (4WD)","allPartsAccessible":true,"maintenanceInterval":30,"permanentPowerSupply":true,"operation":{"permanent":true,"notes":null,"siteVisitInterval":30},"notes":null,"collection":[{"label":"Data portal","uri":null},{"label":"Other transmission types","uri":null},{"label":"XML database","uri":null}],"data":{"policy":{"url":[{"title":null,"value":"https:\/\/repository.saeon.ac.za\/index.php\/s\/nscR6iaHcy4LYds"}],"rights":["Formal acknowledgement of the dataset providers"],"notes":null}}},"relatedResources":null,"projectRelated":{"lter":{"lterSiteClassification":"Master Site"}}}}