MARC record from Internet Archive

LEADER: 02301cam 2200313Ma 4500
001 ocn640490405
003 OCoLC
005 20120507144941.0
008 980203s1997 cau bm f000 0 eng d
040 $aAD#$beng$cAD#$dOCLCQ
035 $a(OCoLC)640490405
037 $aADA333400
100 1 $aGarcez Faria, Antonio Fernando.
245 10 $aNearshore currents over a barred beach.
260 $aMonterey, Calif. :$bNaval Postgraduate School ;$aSpringfield, Va. :$bAvailable from National Technical Information Service,$c1997.
300 $ax, 167 p. ;$c28 cm.
500 $aDissertation supervisor, Edward B. Thornton.
502 $aThesis (Ph. D. in Physical Oceanography)--Naval Postgraduate School, June 1997.
504 $aIncludes bibliographical references (p. 149-152).
520 $aThe objective of this dissertation is to develop numerical models and compare their predictions with data acquired during the DUCK94 experiment in order to improve our physical understanding of the hydrodynamic processes governing the vertical and cross shore distributions of both longshore and cross shore currents over a barred beach. The vertical structure of the mean longshore current is found to be well described by a logarithmic profile and a relationship between bed shear stress and bottom roughness, including the influence of ripples and mega-ripples, was also found. The vertical structure of the mean cross shore current (undertow) is modeled using an eddy viscosity closure scheme to solve for the turbulent shear stress and includes contributions from breaking wave rollers. These models of the vertical profiles of longshore and cross shore mean currents are combined to formulate a quasi three dimensional model to describe the cross shore distribution of the longshore current. This model includes turbulent mixing due to the cross shore advection of mean momentum of the longshore current by the mean cross shore current and contributions from wave rollers.
530 $aAlso available online.
538 $aSystem requirements: Adobe Acrobat reader.
650 4 $aOCEAN CURRENTS.
650 4 $aOCEAN MODELS.
650 4 $aHYDRODYNAMICS.
650 4 $aBEACHES.
856 41 $uhttp://handle.dtic.mil/100.2/ADA333400
994 $aZ0$bPMR
948 $hNO HOLDINGS IN PMR - 1 OTHER HOLDINGS