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June 28, 2023

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Prey and predators create varying life-or-death conditions for salmon, as shown with Atlantis model

This article is the latest in a series about computer models and their uses within the Puget Sound ecosystem. As scientists uncover more and more information about a particular ecosystem, computer modelers are often eager to put that raw data to good use in complex models tuned to local conditions. One highly acclaimed model, called […]

June 23, 2023

Washington Department of Ecology has issued a new permit to control nitrogen at 58 treatment plants, including Bremerton's Westside Wastewater Treatment Plant. Ecology says the upgrades could increase sewer utility fees. Photo: Washington Department of Ecology">

Wastewater fee study reveals hardship for low-income households

Low-income households may need financial help to address the impact of rising wastewater bills, according to a study of current and projected sewage treatment costs published last month by the Puget Sound Institute. The study was initiated in support of the Marine Water Quality Implementation Strategy, a state and federal recovery plan addressing water pollution […]

June 23, 2023

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Southeast Alaska troll fishing restored for this year by court of appeals pending full legal review

Fishing in Southeast Alaska by the commercial troll-fishing fleet will not be cancelled this year, as ordered by a Seattle judge, thanks to a last-minute ruling by the U.S. Ninth Circuit Court of Appeals. Considerations for the economic damage that would be caused by shutting down the Alaskan fishery outweigh the “speculative environmental threats” that […]

June 15, 2023

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Quantitative models, including Ecopath, take food web studies to a higher level of analysis

As part of a project exploring the technical uncertainties surrounding Puget Sound water quality, we are reviewing how computer models are used to advance our understanding of natural systems. This blog post is part of a series focused on different models and their uses within the Puget Sound ecosystem. The project is jointly sponsored by King […]

June 14, 2023

A recently funded study at the Puget Sound Institute will look at the impacts of emerging contaminants on juvenile Chinook salmon. Photo: Roger Tabor/USFWS (CC BY-NC 2.0)">

New federal and state funding to study toxics in Puget Sound

The Puget Sound Institute (PSI) and its parent organization the Center for Urban Waters (CUW) are the recipients of more than $3.2 million dollars in grants this month from the Environmental Protection Agency and the Puget Sound Partnership. The funds will go toward understanding and reducing emerging threats from toxic chemicals in Puget Sound. The […]

June 8, 2023

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Health of killer whales examined through Bayesian network modeling and informed predictions

Qualitative network modeling, as shown in the previous post in Our Water Ways, is focused on actions that create either positive or negative results for actors in the model. This modeling approach is useful for considering the possible outcomes triggered by various actions, especially when data are lacking to develop mathematical relationships between the actors. […]

June 1, 2023

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Researchers use a qualitative network model to test ways to boost production at shellfish farms

As part of a project exploring the technical uncertainties surrounding Puget Sound water quality, we are reviewing how computer models are used to advance our understanding of natural systems. This blog post is part of a series focused on different models and their uses within the Puget Sound ecosystem. The project is jointly sponsored by King […]

May 25, 2023

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Before supercomputers, a structural model helped scientists predict currents in Puget Sound

As part of a project exploring the technical uncertainties surrounding Puget Sound water quality, we are reviewing how computer models are used to advance our understanding of natural systems. This blog post is part of a series focused on different models and their uses within the Puget Sound ecosystem. The project is jointly sponsored by King […]