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Evidence from archaeological excavation, intensive surface survey, geoarchaeological investigations, and remote sensing conducted in fall 2002 establishes parameters for the long-term history of human-environment interaction on the eastern margins of the Upper Khuzestan plains. During the 6th-4th millennia BCE (the Susiana and Protoliterate periods), human settlement in this region was dispersed, intermittent, and shifting, due in part to a subsistence economy based on opportunistic floodwater farming and small-scale sheep and goat herding. Dense settled occupation of the region began only in the later 2nd millennium BCE (during the Middle Elamite period), though little is yet known about land use practices at this time. By the early 1st millennium CE, large-scale canal irrigation is already well developed on the plains and has significantly altered their morphology. Observations along the modern Gargar …