Seawater intake.
https://www.emergency-wash.org/water/en/technologies/technology/seawater-intake
👉🏼 PDF: https://app.box.com/s/zo352r91ited674vf8d4ydxagvpak33p _ Seawater Intakes are used for desalination plants and non-drinking purposes, such as swimming pools or cooling. They are therefore usually not considered for emergencies unless the work is to restore damaged existing intakes for desalination plants to restore drinking water supplies.