We published a new report today, authored by Jon Fuller, that examines avulsion, the process by which flow is diverted out of an established channel into a new course on the adjacent floodplain, in Maricopa County. The report is available at the online AZGS Document Repository for free downloading.
Ref: Fuller, J.E., 2011, Evaluation of Avulsion Potential on Active Alluvial Fans in Maricopa County, Arizona Geological Survey, Contributed Report CR-11-B, 82p.