N., and LARSON, M. 2006. State of knowledge on measurement and modeling of coastal ovorwash. Journal of Coastal Research, 22(41,, ISSN 0749-0208.A critical review is presented on the state of knowledge and calculation capability for coastal overwash. Overwash and overwash deposits Iwashover) accompanying hurricanes and severe storms can devastate coastal communities and habitat, hut in many areas tbese processes are essential for maintaining the integiity of harrier islands while creating new hahitat. This review covers general studies of overwash processes, studies from a geological perspective, physical modeling, field studies including measurements of wa.'ihovers and related hydraulics, and the state of numerical modeling capahility to predict overwash. Although significant literature exists describing individual overwasb events and locations experiencing frequent overwash, complete bydrodynamic and morphologic documentation of an overwasb event is lacking. A limited numher of algorithms or models exist to quantify overwash occurrence, deposited sand volume, and upper beacb profile evolution. Existing models of overwash occurrence and one-dimensional heacb profile evolution bave heen shown to perform successfully against availahle data, and areas of improvement are identified. Models must be made capable of simulating the various wasbover morpbologies that have been pn)duced by different hydrodynamics, overwash spreading hased on dune topography, friction and percolation, and interaction between swasb bores. Comprebensive laboratory and field data sets to acbieve these aims are still lacking.

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