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Scientists are Tracking Raindrops (see video feature)

Narrator: This is Science Today. What is the life cycle of water? A team of researchers at the University of California, Berkeley are determined to track water from the atmosphere to the trees and soil; to streams and oceans and then back into the skies. It's called the Keck Hydrowatch Project, and it focuses on watersheds within the university's Natural Reserve System - from the Mendocino coast of California to the mountains north of Lake Tahoe.

Dawson: We really want to understand how water gets there, and then once it's there, how it moves through that watershed. How much of it goes into the groundwater? How much of it actually goes back out in the streams, goes out as evaporation or even as transpiration used by the vegetation that occupied those different watersheds.

Narrator: Todd Dawson, an integrative biologist, says the effort is multidisciplinary.

Dawson: It involves earth scientists, atmospheric scientists, plant biologists, soil scientists, isotope bio-geochemists, people that work in computer science, people that are working in electrical engineering and then people are also doing modeling.

Narrator: For Science Today, I'm Larissa Branin.