Accruate mapping of tidal wetlands is vital for effective conservation and restoration of these valued habitats, and good mapping is key to strategic planning for coastal resilience. Tidal wetlands are defined by regular inundation by the tides; therefore, mapping of tidal wetlands should be based on knowledge of tidal water levels and the land areas inundated by the tides. We developed this tidal wetland mapping following that principle.
Note: This estuary extent data layer represents the approximate extent of current and historical tidal wetlands for PMEP’s 444 estuaries, excluding “unassociated extents” and “mouth connection areas”. Although this mapping does not distinguish current from historical (disconnected) tidal wetlands, a separate follow-on analysis, an “Indirect Assessment of West Coast USA Tidal Wetland Loss“, resulted in a data layer estimating emergent, scrub-shrub and forested tidal wetland losses for 55 non-lagoonal estuaries spanning the contiguous United States West Coast.
Access the estuary extent data layer