This page answers the questions:
- What is a watershed?
- What does the Green/Duwamish and Central Puget Sound Watershed (WRIA 9) look like?
- How does our watershed support people?
- Who are the "Ancients of the Green"?
- What is healthy watershed habitat for salmon?
- How are we "Making Our Watershed Fit for a King"?
A watershed is a basin-shaped area that drains to a central point where it enters a river, lake or ocean. It can include groundwater, surface water, and salt water such as Puget Sound. Watersheds can encompass small areas draining to a stream or be much larger, such as the Green/Duwamish watershed, which contains many streams and basins but still drains to one point.
The Green/Duwamish and Central Puget Sound Watershed covers much of southern King County. View a map of the watershed. Click on the map to learn more about the different parts -- or subwatersheds -- of this large, diverse watershed.
Watersheds are also called Water Resource Inventory Areas (WRIAs). The Green/Duwamish and Central Puget Sound Watershed is also known as Water Resource Inventory Area 9 (WRIA 9).
Interested in the fascinating life history of salmon? Learn more about salmon
- Provides "people habitat" to nearly 10% of state residents, making it the second-most populated watershed in the state!
- Provides us with drinking water, food, and forest products
- Provides us recreational opportunities and protects us from floods, and
- Supports a diversity of salmon, including Chinook, coho, chum, and steelhead
A healthy watershed provides valuable goods and services that meet the basic needs of people. The economic value of these goods and services is worth billions of dollars annually.
- Learn more about the economic value of ecological goods and services in the Green/Duwamish and Central Puget Sound Watershed (Adobe Acrobat 1.6 MB)
The "Ancients of the Green" are the salmon that begin and end their lives in our watershed. The popular "Ancients of the Green" poster shows these fish and describes their lives in our watershed.
The poster has two sides:
- Front of poster showing the salmon of our watershed against a background of the wild Middle Green River (Adobe Acrobat 2.7 MB)
- Back of poster describing use of the watershed by Chinook, chum, coho, and steelhead (Adobe Acrobat 1.1 MB)
To receive a free copy of this poster, contact Linda Grob, 206-477-4704.
Healthy habitat for salmon in freshwater streams, rivers, and lakes includes:
- Clean, cold, well-oxygenated water
- Access up- and down-stream
- Streamside (“riparian”) habitats that provide food and shade
- Gravel beds free of silt
- Enough water (“flow”)
Young salmon also depend on the Puget Sound nearshore, where they rear after leaving freshwater streams. Healthy nearshore habitat includes:
- Eelgrass beds, kelp forests, and shallow water habitat where they can feed and hide from predators
- Beaches with overhanging vegetation to provide insects and shade for the eggs of fish that young salmon prey on
We want to make our watershed fit for a king -- a King salmon! -- and for all the people who live here.
Many people are working hard to make this happen. Much of this work is guided by the Salmon Habitat Plan, completed in 2005.
Learn more about the Salmon Habitat Plan:
- Read the Executive Summary to the Salmon Habitat Plan (Adobe Acrobat 4.5 MB)
- Read the entire Salmon Habitat Plan
- View the "Making Our Watershed Fit for a King" poster (Adobe Acrobat 13.1 MB)
Learn more about progress in implementing the Salmon Habitat Plan:
- Read the First Annual Progress Report on Implementation of the Salmon Habitat Plan (Adobe Acrobat 3 MB)
You too can join us in making our watershed a better place for both people and fish. Get involved by volunteering or taking steps in your daily life!