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The Center for Coastal Resources Management (CCRM) at the Virginia Institute of Marine Science (VIMS) has been developing tools for several years to guide local governments in shoreline management. In particular, they have focused on the use of ecologically preferred alternatives for erosion control and have conducted research into refining the appropriate uses for a large suite of possible treatments based on existing shoreline conditions. A series of Decision Trees were developed to determine shoreline best management practices when conducting onsite inspections. These were developed to support integrated guidance at the management and regulatory level.<\/SPAN><\/P>

This body of work has been expanded and re-developed as a GIS spatial model known as the Shoreline Management Model (SMM) to determine appropriate shoreline best management practices from the desk-top using available spatial data and the decision tree logic. The assessment is conducted at parcel level scale but the output represents a reach based or cumulative approach to shoreline management. The variables used in the SMM include fetch, nearshore bathymetry, bank height, marsh presence, beach presence, and permanent structures within the riparian zone. Also included are existing shoreline erosion control structures, and the presence of submerged aquatic vegetation (SAV) to enhance the models capabilities for evaluating best management practices along shorelines that have already been hardened or where erosion control practices may impact SAV.<\/SPAN><\/P>

Data presented here has been developed for the Maryland Department of the Environment (MDE) utilizing the Virginia SMM with adaptations to reflect conditions and policies in Maryland. This includes the addition of buffered habitat areas for rare, threatened, and endangered (RTE) species, and federal navigation channels, and modification to the output recommendations and definitions.<\/SPAN><\/P>

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