Investigating Land Subsidence and Earth Fissure Hazards August 29, 2011 | Arizona Geological Survey "The Arizona Land Subsidence Interest Group, a cadre of Earth scientists, geotechnicians, and geological engineers,... Fire-Related Debris Flows in Arizona November 1, 2011 | Arizona Geological Survey Over one million acres of land in Arizona was damaged by wildfires in 2011. ... Sea-Level Rise, Subsidence, and Wetland Loss September 14, 2011 | USGS on YouTube "This video describes causes of wetland loss in the Mississippi River Delta. Rapid land subsidence... Mapping Alluvium and Subflow of the San Pedro River April 27, 2011 | Arizona Geological Survey "The purpose of these investigations is to document and map the extent of Holocene channel... |