Over the last 20 years, the Lower Santa Cruz River watershed (5,000 square miles) has experienced rapid growth. This has led to developments being built in flood-prone areas.
In an effort to encourage development in a large, partially-developed, industrial park in the City of Eloy, Pinal County wanted to remap the “broad-brush” approximate Zone A FEMA floodplains. Our team was tasked with developing a FLO-2D model for a contentious split flow between the Santa Cruz River and the Greene Canal Wash. The total modeling area was approximately 50 square miles and was primarily in agricultural lands. Our team re-delineated over 10 linear miles of floodplain and was able to take a large modeling area to create a FLO-2D model capturing a very detailed and delicate split flow. The hydrologic and hydraulic analyses for this project were also recently approved by FEMA!