Parent Layer: Savannah 100-Year Storm Hydraulic Model and Canals

Name: Savannah 100-Year Storm Hydraulic Model

Display Field: DRAINAGE_B

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This model layer represents the combined local Engineering Firms drainage studies for each drainage basin displaying the 100 Year Flood Limits by polygon boundaries. This model layer defines the areas that will be subject to development restrictions referenced in the 2018 Field Drainage Prevention Ordinance. This layer is to provide assistance in identifying specific local areas of problematic drainage resulting from a 100 Year 24 hour storm event. This model layer represents the hydraulic study of each drainage basin within the City of Savannah. The results of the detail drainage studies take into account not only the surface runoff calculations, but also the pipe sizes and flow direction of existing underground stormwater conduit pipes including recent CIP Drainage Basin improvement projects that may not have been incorporated into the National DFIRM Flood maps.A calibrated hydrologic / hydraulic study of each of the drainage basin was performed using the Stormwater program XPSWMM and historic local flooding data to produce each of the 100 Year Flood Plain Limit boundaries.THIS LAYER IS EDITED AS NEEDED WHEN NEW BASIN MODELS BECOME AVAILABLE. AVAILABLE FOR DOWNLOAD ON THE SAGIS OPEN DATA WEBSITE (www.sagis.org).

Definition Expression: N/A

Copyright Text: BILBO BASIN STUDY - PUBLISHED SEPT. 2013 - HUSSEY, GAY, BELL & DeYOUNG ENGINEERING SERVICES CASEY NORTH BASIN STUDY - PUBLISHED SEPTEMBER, 2013 - HUSSEY, GAY, BELL & DeYOUNG ENGINEERING SERVICES CASEY SOUTH BASIN STUDY - PUBLISHED JULY, 2011 - EMC ENGINEERING SERVICES PLACENTIA BASIN STUDY - PUBLISHED MAY, 2018 - EMC ENGINEERING SERVICES SPRINGFIELD CANAL BASIN STUDY - PUBLISHED DECEMBER, 2017 - THOMAS & HUTTON ENGINEERING SERVICES OWNER: CITY OF SAVANNAH - STORMWATER DEPT. ROGER RAINES - STORMWATER DEPT. DIRECTOR - (PH. 650-7855) rraines@savannahga.gov ZACK HOFFMAN - STORMWATER DEPT. ENGINEERING CIP ADMINISTRATOR (PH. 644-7762) zhoffman@savannahga.gov BARRIE WILKINS - ARCGIS EDITOR FOR THIS LAYER (PH. 650-7855) bwilkins@savannahga.gov

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Supports Datum Transformation: true

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Spatial Reference: 102100  (3857)

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Supported Operations:   Query   Generate Renderer   Return Updates

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