IDB Parameters & Statistics

Parameters % Statitsics

The database contains entries varying greatly in size of inlet, wave exposure, tidal prism, and number of jetties. For example, the tidal prisms of inlets within the database range from 2.41x106 m3 for Venice Inlet in Florida to 1.44x109 m3 for the San Francisco Bay entrance in California. Inlets with no jetties, one jetty, and two jetties are represented. Table 1 is a listing of the hydraulic, geometric, and tidal parameters included within the Federal Inlets Database.

Mean significant wave height and the associated mean peak wave period were obtained for the inlets from 20-year hindcast statistics available from the U.S. Army Corps of Engineers Wave Information Study (http://www.frf.usace.army.mil/cgi-bin/wis/atl/atl_main.html). Although wave hindcasts have limitations, this procedure is expected to provide uniformity for the needed wave information around the coast of the United States. Tide range was obtained from the closest NOS sea tide gauge (http://tidesonline.nos.noaa.gov/). Tidal prism was compiled from Jarrett (1976), inlet management plans, and other sources. The sources of the information contained within the database are included in Table 1.

Table 1. Parameters Contained within the Federal Inlets

Inlet Name	CIRP listing of Federal Inlets (Was this from Mark Byrnes)
State	CIRP listing of Federal Inlets	District	CIRP listing of Federal Inlets	Federal Channel (Y/N)	CIRP listing of Federal Inlets	Federal Inlet (Y/N)	CIRP listing of Federal Inlets	Latitude	CIRP listing of Federal Inlets	Longitude	CIRP listing of Federal Inlets	Number of Jetties (0,1,2)	Jarrett (1976) and recent aerial photographs	Weir	Industry reports and personal communication	Location of Weir (N,S,E,W)	Industry reports and personal communication	No. of Breakwaters	Industry reports and personal communication	Tidal Prism, m3	Jarrett (1976) and other industry reports	NOS Station Number	http://tidesonline.nos.noaa.gov/	Mean Tidal Range, m	http://tidesonline.nos.noaa.gov/	Spring Tidal Range, m		Min. Width, m	Aerial photographs and nautical charts	WIS Station Number	http://www.frf.usace.army.mil/cgi-bin/wis/atl/atl_main.html	WIS Station Number Lat	http://www.frf.usace.army.mil/cgi-bin/wis/atl/atl_main.html	WIS Station Number Long	http://www.frf.usace.army.mil/cgi-bin/wis/atl/atl_main.html	WIS Station Depth, m	http://www.frf.usace.army.mil/cgi-bin/wis/atl/atl_main.html	Mean Wave Height Hmo, m	http://www.frf.usace.army.mil/cgi-bin/wis/atl/atl_main.html	Mean Peak Period Tp, sec	http://www.frf.usace.army.mil/cgi-bin/wis/atl/atl_main.html	Rep. Avg Qnet, m3/yr	Industry reports and personal communication	Direction of Qnet (degrees)	Industry reports and personal communication	Direction of Qnet (N,S,E,W)	Industry reports and personal communication	Spring Discharge,m3/s	Industry reports and personal communication	River Avg. Discharge m3/s	Industry reports and personal communication	River Maximum Discharge m3/s	Industry reports and personal communication	Median Grain Size d50,mm	Industry reports	Recent Min. Channel Cross Sectional Area Below msl, m2	Industry reports and personal communication	Rep. Avg Annual Entrance Dredging, m3/yr	District webpages	Rep. Min Annual Entrance Dredging, m3/yr	District webpages	Rep. Max Annual Entrance Dredging, m3/yr	District webpages	Maintained Channel Depth Over Bar mllw, m	District webpages	Maintained Channel Width Over Bar mllw, m	District webpages	Advance Dredging Depth Over Bar, m	District webpages	Maintained Entrance Channel Depth mllw, m	District webpages	Maintained Entrance Channel Width mllw, m	District webpages	Advance Entrance Dredging Depth, m	District webpages	Orthogonal of Shoreline (N,S,E,W,NA)	Aerial photographs	Comments	Miscellaneous sources	Jetty Offset	Aerial photographs	Min. Width (reported), m	Industry reports	Distance Offshore, km		Distance to Downdrift Attachment minus Wc/2, km	Aerial photographs and nautical charts	Distance to Updrift Attachment minus Wc/2, km	Aerial photographs and nautical charts