Table : Roughness Coefficients Flooding Source Channel Overbank “n” “n” Culvert Creek 0.040-0.060 0.040-0.080 Inundation River 0.040-0.060 0.040-0.080 North Fork Inundation River 0.080-0.100 0.040-0.080 South Fork Inundation River 0.030 0.030-0.035 5.3 Coastal Analyses For the areas of Flood County that are impacted by coastal flooding processes, coastal flood hazard analyses were performed to provide estimates of coastal BFEs. Coastal BFEs reflect the increase in water levels during a flood event due to extreme tides and storm surge as well as overland wave effects. The following subsections provide summaries of how each coastal process was considered for this FIS Report. Greater detail (including assumptions, analysis, and results) is available in the archived project documentation. summarizes the methods and/or models used for the coastal analyses. Refer to Section 2.5.1 for descriptions of the terms used in this section. Table : Summary of Coastal Analyses Date Analysis Flooding Study Limits Study Limits Hazard Model or was Source From To Evaluated Method Used Completed Entire Entire coastline of coastline of Big Ocean Storm Surge ADCIRC 99/99/9999 Flood Flood County County Entire Entire Direct coastline of coastline of Big Ocean Wave setup Integration 99/99/9999 Flood Flood Method (DIM) County County Entire Entire coastline of coastline of Statistical Big Ocean JPM 99/99/9999 Flood Flood Analyses County County Entire Entire coastline of coastline of Wave Big Ocean TAW 99/99/9999 Flood Flood Runup County County Entire Entire coastline of coastline of Wave Big Ocean ACES 99/99/9999 Flood Flood Generation County County
Table : Roughness Coefficients Flooding Source Channel “n” Overbank “n” Culvert Creek 0.040-0.060 0.040-0.080 Inundation River 0.040-0.060 0.040-0.080 North Fork Inundation River 0.080-0.100 0.040-0.080 South Fork Inundation River 0.030 0.030-0.035 5.3 Coastal Analyses For the areas of Flood County that are impacted by coastal flooding processes, coastal flood hazard analyses were performed to provide estimates of coastal BFEs. Coastal BFEs reflect the increase in water levels during a flood event due to extreme tides and storm surge as well as overland wave effects. The following subsections provide summaries of how each coastal process was considered for this FIS Report. Greater detail (including assumptions, analysis, and results) is available in the archived project documentation. summarizes the methods and/or models used for the coastal analyses. Refer to Section 2.5.1 for descriptions of the terms used in this section. Table : Summary of Coastal Analyses Flooding Source Study Limits From Study Limits To Hazard Evaluated Model or Method Used Date Analysis was Completed Big Ocean Entire coastline of Flood County Entire coastline of Flood County Storm Surge ADCIRC 99/99/9999 Big Ocean Entire coastline of Flood County Entire coastline of Flood County Wave setup Direct Integration Method (DIM) 99/99/9999 Big Ocean Entire coastline of Flood County Entire coastline of Flood County Statistical Analyses JPM 99/99/9999 Big Ocean Entire coastline of Flood County Entire coastline of Flood County Wave Runup TAW 99/99/9999 Big Ocean Entire coastline of Flood County Entire coastline of Flood County Wave Generation ACES 99/99/9999
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