The Quick2 program was programed before geographical information system (GIS) software and is designed to calculate a Base Flood Elevation (BFE) by inputting:
- station and distance values
- a discharge value
- bank stations
- Manning's N values
- and a slope value
Once entered a water surface elevation is generated that can meet FEMA minimum BFE requirements. When reading FEMA 265 - the Zone A document for Quick2 - the mapping references are now all GIS processes.
The attached BFE Worksheet provides a place to collect the information and values needed in this process. Once all the values above are entered into the Workbook, they are formatted into a Quick2 formatted file that is imported. Once imported, the slope is entered and a result screen is displayed. The result screen references a WS ELEV (water surface elevation) that is calculated from a referenced discharge.
The discharge is referenced from the USGS StreamStats program for the stream location. Depending on the state and USGS study an entire range of discharge values is available and can include the 1% annual chance discharge value. It is this value that can be used to calculate a FEMA BFE for Zone A's.
The value of this Worksheet is for the utility of collecting the individual variables and to format a text file for input into Quick2.
Download HERE
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