2011 NeFSMA Conference - FEMA RiskMAP Product, Multi-Frequency Grids for Lincoln

FEMA RiskMAP Product – Multi-Frequency Grids for City of Lincoln, Nebraska, William Zung, CFM Greenhorne & O’Mara, Jason Schneider, P.E., CFM Greenhorne & O’Mara, Ben Higgins, P.E. City of Lincoln, Nebraska

As one of FEMA’s Risk MAP Early Demonstration Projects Greenhorne & O’Mara completed Multi-Frequency Grids for the Little Salt Creek Basin.  The Little Salt Creek Basin is made up of 72 miles of new detail study completed by the City of Lincoln as a Cooperating Technical Partner (CTP).  Greenhorne & O’Mara leveraged this existing detail study to create the following Flood Risk Datasets:  Depth grids as the 10%, 4%, 2%, 1%, and 0.2% annual chance floods, percent annual chance flood grids, percent chance of being flooded in a 30 year grid, water surface elevation grids, and velocity grids.  These products were presented to the City of Lincoln for outreach materials to help communicate risk to stakeholder.