Saltwater intrusion

Rarity: Common

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Notion

Domain

Science and technology

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What Wikipedia says

Saltwater intrusion is the movement of saline water into freshwater aquifers, which can lead to groundwater quality degradation, including drinking water sources, and other consequences. Saltwater intrusion can naturally occur in coastal aquifers, owing to the hydraulic connection between groundwater and seawater.

Excerpt from the Wikipedia article “Saltwater intrusion”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Sweetian, CC BY-SA 3.0, via Wikimedia Commons.