ANALYTICAL MODEL OF NAVIGATION CHANNEL INFILLING BY CROSS-CHANNEL TRANSPORT

Nicholas C. Kraus, Magnus Larson
2003 Coastal Engineering 2002  
An analytic model is presented for estimating the time-evolution of bank encroachment, sediment deposition, and bypassing of a channel of specified initial cross section exposed to an active zone of longshore or other known crosschannel sediment transport. It is applicable to channels in estuaries, bays, and lakes by input of the rate of sediment transport (sand to gravel range) approaching normal to the channel. The model can be applied to estimate necessary depth and width of a channel to be
more » ... of a channel to be newly dredged or the performance of a channel to be deepened and widened. The model is based on the continuity equation governing conservation of sediment volume, together with typically available or estimated input transport rates in engineering applications. An analytical solution of the linearized coupled differential equations has pedagogic value and gives insight into the processes of channel infilling and bypassing. The analytic model can also serve as an engineering screening tool. Numerical solution of the full nonlinear, coupled equations allows extension to more complex situations. Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. Same as Report (SAR) 18. NUMBER OF PAGES 13 19a. NAME OF RESPONSIBLE PERSON a. REPORT unclassified b. ABSTRACT unclassified c. THIS PAGE unclassified Standard Form 298 (Rev. 8-98) Prescribed by ANSI Std Z39-18
doi:10.1142/9789812791306_0309 fatcat:7rl433nsjjhwddhwueut7qdvxq