TABLE 7-2 GIS Layers Showing Environmental and Socioeconomic Constraints Identified in the DOE Tidal Resource Assessment

Layer

Theme

Role
Environmental constraints

Fish Invertebrates Reptiles Birds Mammals Plants and habitats

Critical areas
     
Socioeconomic constraints

Urbanized areas Transmission Transportation Built-up areas

Favorable areas
     
 

Restricted areas Fairways and shipping lanes Dumping sites Cable areas Pipeline areas Shoreline constructions Wreck points Mooring and warping points Recreation areas and access locations (boat ramps, diving sites, marinas) Management areas (marine sanctuaries, national parks, wildlife refuges, special management areas) Cultural heritage sites (archaeological sites, historical sites)

Restricted areas
     
 

Resource extraction sites (Aquaculture sites, commercial fisheries, recreational fishing)

Not assigned

SOURCE: Adapted from Defne et al., 2011.

recreational sailing, scenic views, and rare species. Including these values explicitly in the cost-benefit analysis may result in a different decision about MHK sites than if only the energy sector is considered (NOAA, 2011b).

Tools for MHK Site Planning

While full trade-off analyses (including benefits and costs) have rarely been used in ocean planning efforts to date, there are many decision support tools that can help assess trade-offs. They can be analyzed with



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