Coastal Storm Model.
Abstract
A mathematical simulation model of a coastal storm has been programmed to forecast or hindcast wave and longshore current conditions at a coastal site. Storm parameters for the model are based on the size, shape intensity and path of the storm as derived from weather maps. An elliptical form is used to model the size and shape of the storm which are controlled by varying the length and orientation of the major and minor axes. Storm intensity is a function of the barometric pressure gradient which is modeled by an inverted normal curve through the storm center. The storm path is based on actual storm positions for the hindcast mode, and on projected positions assuming constant speed and direction for the forecast mode. The location, shoreline orientation and nearshore bottom slope provide input data for each coastal site. For each storm position, the geostrophic wind speed and direction are computed at the shore site as a function of barometric pressure gradient and latitude. The geostrophic wind is converted into surface wind speed and direction by applying corrections for frictional effects over land and sea.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 30, 1976
- Accession Number
- ADA087858
Entities
People
- Richard A. Davis Jr.
- William T. Fox
Organizations
- Williams College