Project Global: Ground


This exploration of our current day metropolitan condition as a system of systems deals with the crust of the Earth as a primary carrying capacitor of human activities, from the extraction of resources deep within the ground, to agricultural operations that barely scratch the surface.

Part 1: Lexicon

Part 2: Atlas



Part 1: Lexicon index

︎ Formation

    ︎ Kaapvaal Craton
    ︎ Johannesburg Dome
    ︎ Vredefort Dome
    ︎ Topsoil
    ︎ Müggelsee


︎ Measurement    ︎ Schwerbelastungskörper
    ︎ Mining Earthquakes
    ︎ Low-tech Soil Testing
    ︎ Soil Texture Triangle
    ︎ Geologic Time Scale 
    ︎ Stratigraphic Colum
    ︎ Geographic Information System
    ︎ Ecotone
    ︎ Cultural Landscape

︎ Prototype
    ︎ Unter den Linden
    ︎ Zoological Landscape
    ︎ Counterculture
    ︎ Cultural Agency
    ︎ Mine-pit Lakes
    ︎ Parliament of Things

︎ Land distribution
    ︎ 1913 Natives Land Act
    ︎ District Six
    ︎ Eavesdropping
    ︎ Reconciliation Policy
    ︎ Land Grabbing
    ︎ Land Acting
    ︎ The Red Ants
    ︎ #PutSouthAfricansFirst
    ︎ Suburban Enclaves
    ︎ Parallel State

︎ Extraction
    ︎ Cullinan Diamond Mine
    ︎ Platinum Group Metals
    ︎ Zamazamas
    ︎ Gold Rush Inertia
    ︎ Sinkhole
    ︎ Maize Doctor
    ︎ Coal Hands

︎ Infrastructure
    ︎ Gautrain
    ︎ Le-guba
    ︎ Lesotho Water Project
    ︎ Deutscher Wald
    ︎ Arrival City

︎ Production
    ︎ Safari Economy
    ︎ Agritourism
    ︎ Rainfall Line
    ︎ Upington Airport
    ︎ Tiergarten Transformation
    ︎ Pivot Irrigation
    ︎ Allotment Garden
    ︎ Bokoni Terracing
    ︎ Johannesburg Forestation
    ︎ Game Farming Cycle

︎ Waste
    ︎ Trümmerberg
    ︎ Fab-Soil
    ︎ Mining Waste Belt
    ︎ Sanitary Landfilling
    ︎ Soil Structure
    ︎ Biogas Technology

︎ Pollution
    ︎ Dry Stacked Tailings
    ︎ Water Pollution
    ︎ Soil Pollution
    ︎ Uranium Sandstorms
    ︎ Poaching

︎ Remediation
    ︎ European Green Belt
    ︎ Conservation Agriculture
    ︎ Airfield Urbanism
    ︎ Solar Park
    ︎ Gold Reef City
    ︎ Mine Pit Lake
    ︎ Loess Plateau
    ︎ Erosion Control




Rainfall Line

“ — ”


South Africa is divided by the 500 mm rainfall line, which runs across the country from Port Elizabeth in the eastern Cape through the middle of the Free State into the western Transvaal. Northwest of this line, annual rainfall often remains below 200mm whereas to the East typically receives 500-900 mm of rainfall per year. A large area of the center of the country receives about 400mm of rain, on average, and there are wide variations closer to the coast. The 400mm "rainfall line" has been significant because land East of the rainfall line is generally suitable for growing crops and; and land West of the rainfall line suitable only for livestock grazing or irrigation-intensive crop cultivation.
        The ability to effectively farm or raise livestock across the South African territories is evidenced in the geographic spread of pre-colonial populations. The dense settlements of iron-using, cultivating, Bantu-speaking African people, who had for centuries made up the bulk of the country's population, lived mostly in the regions east of the rainfall line, unable to penetrate into the more fertile pockets to the west around the Cape Peninsula. The Khoisan hunters, gatherers, and herders largely occupied the western Cape and the drier parts of the interior . Xhosa communities also penetrated into the dry northern Cape in the early nineteenth century. The major exception has been the Tswana chiefdoms whose territories straddied the semi-arid highveld plateau regions in the current Free State and Gauteng territories.  These pre-colonial settlements reveal that more-densely occupied settlements within present-day South Africa before the twentieth century were largely restricted to areas with higher rainfall.




Image source:  Wellington, John H. “Land Utilization in South Africa.” Geographical Review 22, no. 2 (1932): 206. https://doi.org/10.2307/209174.


References
1.   Wellington, John H. “Land Utilization in South Africa.” Geographical Review 22, no. 2 (1932): 205–24. https://doi.org/10.2307/209174.
2.   “South Africa Weather and Climate.” Accessed March 6, 2022. https://www.sa-venues.com/no/weather.htm