U.C. Davis study finds dams ineffective for conservation…

By Dan Bacher | September 9, 2021 | Sacramento News and Review

For many years, federal, state and corporate proponents of building more dams in California have touted cold water river releases provided by increased water storage behind dams as a key tool in “saving” struggling salmon and steelhead populations.

Yet a just published study by the UC Davis Center for Watershed Sciences, Dams Ineffective for Cold-Water Conservation– 8/25/21, has found that dams are ineffective for the cold water conservation that is needed to preserve imperiled salmon, steelhead and trout.

”Dams poorly mimic the temperature patterns California streams require to support the state’s native salmon and trout — more than three-quarters of which risk extinction,” according to the study published in the journal PLOS ONE by the University of California, Davis. “Bold actions are needed to reverse extinction trends and protect cold-water streams that are resilient to climate warming.”

The study helps identify where high-quality, cold-water habitat remains to help managers prioritize conservation efforts.

https://sacramento.newsreview.com/2021/09/09/u-c-davis-study-finds-dams-ineffective-for-conservation-of-salmon-and-trout-in-sacramento-area-waterways/

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Local Groundwater Sustainability

On September 8, 2021, ECOS and Habitat 2020 submitted a letter regarding the Groundwater Sustainability Plan of the South American Sub-basin (SASb), just south of the American River.

Background

Climate change in the Sacramento region requires innovation to deal with more extremes in precipitation. In wetter years, we should pump water into groundwater basins so that we can pump it out during drier years. Just south of the American River is the South American Sub-basin (SASb) that we agree should be used this way. The SASb Groundwater Sustainability Plan includes a Sustainable Yield value – the amount of groundwater that can be extracted annually from the SASb while maintaining it at a sustainable level. This letter provides comments on how the draft Groundwater Sustainability Plan develops the Sustainable Yield level and proposes management actions that should be taken to ensure the SASb’s Sustainable Yield is maintained in the future. 

Click here to read our letter in full.


Photo by eberhard grossgasteiger from Pexels

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