'Ground water sources' diaporamas de présentation

Source Water Protection

Source Water Protection. Best Management Practices and Other Measures for Protecting Drinking Water Supplies. Introductions and Background. Introductions California SWAP results Source Water Protection Strategy for California. Assessments Performed by:. 42% DHS 38% Counties 20% PWS.

1.89k views • 137 slides

Water

1.51k views • 88 slides

The earth is 71% covered by water...

The earth is 71% covered by water... Earth is the only planet known to have water in all three phases (gas, liquid, and solid) It never disappears, as it is perfectly recycled. Our Wonderful Water World. A solar-powered water world!. A water shortage?. With a planet covered in water?

693 views • 53 slides

721 views • 25 slides

The Rhind papyrus

The Rhind papyrus * named after the Scottish Egyptologist Alexander Henry Rhind, who purchased it in 1858 * written around 1650 BC by the scribe Ahmes who copied a document 200 years older * contains mathematical and geometric problems * Uses the value. how do we know?.

290 views • 5 slides