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Silver Jackets Project - Chattahoochee River in Helen, Georgia (General)


Authors: Victor Hom
Owners: Victor Hom
Resource type:Composite Resource
Created:Apr 30, 2018 at 4:29 p.m.
Last updated: Apr 30, 2018 at 4:53 p.m. by Victor Hom

Abstract

The purpose of this project was to complete Flood Forecast Inundation Mapping (FFIM) for a reach of the Chattahoochee River through the city of Helen, Georgia. The FFIM project submittals include a geo-referenced HEC-RAS hydraulic model and geo-referenced inundation polygons and depth grids. In addition to this main data submittal, base and supplemental data are required to accompany the mapping products for proper documentation and implementation of the flood mapping outputs. The reach was modeled with 1-D, steady flow hydraulic modeling software, utilizing geo-referenced stream parameters and a 2-m LiDAR dataset. These data will be provided to the National Weather Service (NWS) of the National Oceanic and Atmospheric Association (NOAA) for potential implementation onto the Advanced Hydrologic Prediction Service (AHPS) web interface and connected with the river forecast for HDCG1.

The project area is located in the city of Helen, Georgia, which lies in north-central White County and the Chattahoochee River Watershed. The county is bordered by Towns County to the north, Union and Lumpkin Counties to the west, Habersham County to the east, and Hall County to the south. The project area encompasses an approximate 5.25-mile reach of the Chattahoochee River, beginning at a location approximately 7,600 feet upstream of the Helen, GA corporate limits, and ending at a location approximately 5,800 feet downstream of the Helen, GA corporate limits.

NWSLID: HDCG1
Latitude: 34.700833° N, Longitude: 83.729444° W, Horizontal Datum: NAD83/WGS84

Subject Keywords

Georgia,USACE,Silver Jackets,Chattahoochee River,HDCG1,HUC-03130001,HECRAS,Helen,NOAA NWS AHPS,FEMA,USGS,FIM

How to cite

Hom, V. (2018). Silver Jackets Project - Chattahoochee River in Helen, Georgia (General), HydroShare, http://www.hydroshare.org/resource/e35527ebd1f2497eba2620538eec1a19

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
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Authors

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Name Organization Address Phone Author Identifiers
Victor Hom

Credits

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
USACE Savannah District

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