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Science Quickly

Desalination Could Cause Ecological Sea Change

Science Quickly

Scientific American

Science

4.2639 Ratings

🗓️ 7 February 2019

⏱️ 3 minutes

🧾️ Download transcript

Summary

An environmental assessment of the nation's largest desalination plant finds mixed results. Christopher Intagliata reports. Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

Understanding the human body is a team effort. That's where the Yachtel group comes in.

0:05.8

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

0:11.0

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

0:19.6

To learn more about Yachtolt, visit yawcot.co.j.j.p. That's y-A-K-U-L-T-C-O-J-P.

0:28.4

When it comes to a guide for your gut, count on Yacolt.

0:33.7

This is Scientific American's 60-second science. I'm Christopher in Taliatta.

0:39.0

Winter storms have walloped California this year, and snowpack is piling up.

0:43.8

But just a few years back, the state was rung dry by a record-breaking drought,

0:48.1

and more dry spells will surely come.

0:50.3

I think everybody agrees that we need more water resources.

0:54.7

Adina Payton, an oceanographer at the University of California, Santa Cruz.

0:58.7

She points out that her home country, Israel, once faced the same problem.

1:02.9

Israel had water issues forever and ever.

1:06.1

And they don't have water problems anymore because they converted pretty much 90% of water use to desalination.

1:15.7

Ocean desalination hasn't enjoyed as much traction in California due to its cost and because of

1:21.0

concerns that the plants would damage coastal ecosystems, both when the seawaters sucked in and when

1:26.3

leftover super salty brines are released.

1:29.3

Now, writing in the journal Water, Peyton and her team have assessed the environmental impact of the nation's largest plant, the Carlsbad desalination plant north of San Diego.

1:38.7

Here's the good news.

1:40.1

Scuba Dives revealed that the communities of starfish, snails, sea cucumbers, and other creatures that live on the sandy ocean bottom offshore have not budged since the plant opened in 2015.

1:51.0

But the bad news? The plume of salty runoff stayed intact much farther out than models predicted, rather than easily blending with closer seawater.

1:59.5

When you have a pool of salty water that doesn't mix, it prevents oxygen from penetrating

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