The landscape just south of Port Augusta (ie., after Port Pirie ) is quite different to the landscape north of Port Augusta on the way to Woomera. It is a study in contrasts: farmland and desert.
The Princess Highway, south of Port Augusta, runs between Spencer Gulf and the lower Flinders Ranges, and the country between the highway and the Flinders Ranges is primarily farmland. The landscape looked very green and lush after all the winter and spring storms and rains.
The electricity grid that extends down to Adelaide is very obvious in the landscape. Port Augusta is a transport hub and a crossroads. The old coal-fired power stations (the Playford A and Northern Power Stations) have been closed, as has the Leigh Creek coal mine. There is a community pushfor a transition from coal to renewable energy (solar thermal plants) and to make Port Augusta a renewable energy power hub.
Since the stops to take photos would be few and far between due to time constraints, I choose to sit in the back of the LandRover Discovery on the Mildura to Pimba leg of our road trip to Lajamanu. It was going to be traveling all day with an occasional stop. I sat in the back so I could take snaps of the landscape through the window.
The picture below is of pastoral/grazing country on the Goyder Highway in South Australia, on route to Port Augusta. This highway is an east-west link through the Mid-North region of South Australia, and this is the landscape between the River Murray at Morgan and Burra in the mid-north of South Australia.
It is sparse, saltbush country with a few small trees. It looked strange and I wondered what would it have looked prior to grazing? Would there have been more trees? Probably a mallee woodland.
This landscape is north of an imaginary line that separates the land in South Australia that receives 300 mm or more rainfall per year from the land that receives less than 300 mm per year. The imaginary line is named after George Goyder, a government surveyor who first identified and mapped Goyder’s Line.
This line indicates the northern limit of climatic suitability for intensive agriculture in South Australia. North of Goyder’s Line, annual rainfall is usually too low to support reliable cropping, with the land only being suitable for grazing.