Sturt National Park

1974 - 1989



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Landcover change for an area straddling the Qld/NSW border and including Sturt National Park. The earlier scene was acquired during an episodically wet time. The claypans and playa lakes were brimful of turbid water that has a cobalt blue colour in the FCC image. The later image is dry. The Difference FCC is dominated by changes in landcover greenness and the loss of water from the claypans. Careful examination of all three FCC images will show that the Queensland parts of the scene have lost cover, ie they are darker in the Difference image. Careful examination of the 1989 and Difference FCC images will show fenceline contrast in the amount of landcover.

Image size: 95 x 80 km or 7600 km2.


This scene covers most of Sturt National Park in the northwest corner of New South Wales. The park came into existence in the early 1970s, not long before the first image of the sequence was acquired. The area had previously been under pastoral landuse (sheep) and was in very poor condition. The change in landcover over the period 1974 to 1989 is captured in the FCC images, but is not easily interpreted.

The difficulty has two origins. The first is that February 1974 was a very wet month of a very wet year. The second is that two very different landscape types occupy the image - the dark, stone covered (gibber) plain and a reddish sandplain. Drainage lines and occluded lakes or clayplans cover the scene, which is divided almost in half by the border of NSW and Queensland. This state boundary is visible because of a track running along the dingo fence. The states are visible because of landuse consequences.

The Difference FCC is dominated by widespread and substantial changes in landcover greenness, particularly in the drainage lines. In 1989, the rainfall was a lot less than in 1974, a point reinforced by the amount of casual water in the lakes and claypans. Nonetheless, careful examination of all three images will show that parts of the scene in Queensland have lost cover. These are the areas that remain under pastoral landuse (cattle). Similar boundary effects with the southern neighbours of Sturt National Park cannot be detected, but the interpretation of this lack of difference can be ambiguous.