“…An updated report by Hill et al (2015) indicated that more than 1500 km of canals, ditches, and laterals have been mapped, with some canals reaching as far as 16 km from the river. Authors have described the morphology of canals (Woodbury, 1960; Howard, 1993; Huckleberry, 2015); the likelihood that saline or waterlogged soils impacted Hohokam agriculture (Hodge, 1893; Halseth, 1936; Schroeder, 1943) or that soil salinization was not a significant factor affecting Hohokam agriculture (Ackerly, 1988); the effort required in canal construction and maintenance (Hayden in Schroeder, 1943; Woodbury, 1961; Doolittle, 1991; Howard, 1993); the possibility that the maintenance and management of complex Hohokam canal systems required significant social coordination (Masse, 1981; Hunt et al, 2005); and the surmise that Hohokam canals were objects to be controlled and a symbol of wealth and power indicative of political evolution. Archaeologists have also studied the morphology of river channels to suggest how their structures might reflect past flood events and, by inference, Hohokam agriculture (Woodson 2014).…”