Salinity Calculations in the Coastal Modeling System
ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
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This Coastal and Hydraulics Engineering Technical Note CHETN describes procedures to calculate salinity change within the Coastal Modeling System CMS operated in the Surface-water Modeling System SMS, version 11.0. The CMS is a two-dimensional 2-D hydrodynamic and sediment transport model designed for coastal and inlet applications, and the SMS is a graphical user interface utility for PCs as developed by the U.S. Army Corps of Engineers USACE. For calculating salinity with the 2-D CMS, the project area must be well-mixed in the vertical dimension. The procedure and the CMS verification are illustrated by the salinity modeling in Matagorda Bay, Texas. Salinity refers to the salt content of water. Its value typically runs from 0 for fresh water to 31-35 ppt parts per thousand for ocean water. In water bodies with poor mixing and limited water exchange, or experiencing high evaporation, salinity can be higher and lead to formation of brine.
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