By not trading as much anymore until they ask for what they want?
A the southwest isnt an area that is fully populated yet due to the land layout and the weather and lack of jobs
Answer:
One of Joburg's largest rivers, the Jukskei flows northwards, meandering through Bedfordview and moving back to Joburg before it joins the Crocodile River flowing into the highly eutrophic Hartbeespoort Dam