Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/2244
Title: Shoal-reduction strategies for entrance channels
Authors: Rosati, Julie Dean
Kraus, Nicholas C.
Keywords: Sediment shoaling
Channels
Inlets
Entrances
Geomorphology
Shoaling
Jetties
Publisher: Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical note (Coastal and Hydraulics Engineering (U.S.)) ; IV-22.
Description: Technical note
Background: From fiscal year (FY) 1995 through 1998, the US Army Corps of Engineers (USACE) dredged between 200 and 300 million m3/yr from Federal channels. Maintenance dredging accounted for an average of 89 percent of this volume, and new work and emergency dredging comprised the remainder. Total dredging expenditures increased from approximately $532 to $713 million in FY 1995 through FY 1998, with maintenance dredging accounting for 78 percent of the cost (see U.S. Army Corps of Engineers Navigation Data Center Long-Term Dredging web site at http://www.wrsc.usace.army.mil/ndc/ddhisbth.htm). A reduction in maintenance dredging can represent a significant cost and timesaving measure to the operation and maintenance of USACE waterways. The focus of this CETN is how sediment shoals into open-coast channels. The primary sediment-transport pathways can be referenced to the jetties stabilizing the inlet entrance. Sediment can move around the tip of a jetty, entering directly into the channel; around the tip of the jetty, on to the ebb shoal and into the portion of the channel that transverses the ebb shoal, through a jetty, over a jetty, and around the landward side (see green arrows in Figure 1). Pope (1997) gives a classification system of channel shoaling based on general considerations of geomorphology.
Rights: Approved for public release; distribution is unlimited.
URI: http://hdl.handle.net/11681/2244
Appears in Collections:Technical Note
Technical Note

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