Inspecting a Subsidence Gauge
USGS scientist Dan Kroes checks a subsidence instrument. Normally, this area is either barely under water or completely dry. The instrument is housed at around 7 or 8 feet, and there was just 16 inches between the sensor and water.
In late 2015/early 2016 unusually large rainfall in the Upper Mississippi River Valley led to significant flooding in Arkansas, Illinois, Louisiana, Mississippi, Missouri, and Tennessee. USGS crews responded to the flooding by collecting streamflow and water quality information and providing it to emergency responders.