What happens to Oregon’s tidal wetlands with sea level rise?

Tidal wetlands provide food, shelter, flow dampening, flood attenuation, and sediment capturing for wildlife. these wetlands are vulnerable to sea level rise (SLR).

The MCWC modeled the impacts of six SLR scenarios in 23 Oregon estuaries south of the Columbia. The resulting products include: a final report and slide show presentation; shapefiles of information of impacts of each SLR scenario for each estuary, prioritization information and metadata for users with GIS expertise; maps of the 4.7' SLR scenario, a prioritization for each area using this SLR scenario, and tables that shows the acreage of tidal wetland areas lost under each scenario.

These tools will help watershed councils, land trusts, soil and water conservation districts, coastal city and county planners, and state and federal agencies plan into the future by working with landowners of properties upslope of current wetland areas on conservation and restoration opportunities. They also provide a valuable opportunity for the public to learn more about how our coastlines will change.


lmz project summary
LMZ Final Report
LMZ Slide Show Presentation

example: siletz bay

4.7 Siletz crosshatch.jpg

Potential future tidal wetlands maps provide a comparison of the 4.7 feet of SLR scenario and the current landscape.

Siletz Prioritization.jpg

Prioritization maps for each estuary show the Landward Migration Zone area priorities based on the five scoring criteria (See final report for full scoring criteria).

Siletz Bay Bar Chart w years.jpg

Bar charts for each estuary show the current (0.0 feet) LMZ area in acres, as well as the expected LMZ areas under six sea level rise scenarios.


Permalinks to all the products and data:

Project GIS Data

Permalinks to map documents:

Alsea Bay Estuary
Beaver Creek Estuary
Chetco River Estuary
Coos Bay Estuary (North)
Coos Bay Estuary (South)
Coquille River Estuary
Elk River Estuary
Necanicum River Estuary
Nehalem River Estuary
Nestucca Bay Estuary
Netarts Bay Estuary
New River Estuary
Pistol River Estuary
Rogue River Estuary
Salmon River Estuary
Sand Lake Estuary
Siletz Bay Estuary
Siuslaw River Estuary
Sixes River Estuary
Tillamook Bay Estuary
Umpqua River Estuary
Winchuck River Estuary
Yachats River Estuary
Yaquina Bay Estuary

thank you to our partners and funders:

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