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hydrology

Iowa impact crater confirmed

An airborne geophysical survey mapping mineral resources in the Midwest has confirmed that a 470-million-year-old impact crater nearly five times the size of Barringer (Meteor) Crater in Arizona lies buried several hundred meters beneath the town of Decorah, Iowa.

07 Jul 2013

Sahara dust brings rain and snow to California

What triggers the mountain rain and snow that are vital to California’s water and energy needs? The answer, according to new research, is blowing in the wind: dust and bacteria from as far away as Africa’s Sahara Desert.

01 Mar 2013

New York's Dirty Secret: The effort to clean up America's largest oil spill

Wedged between the hard-bitten boroughs of Brooklyn and Queens, N.Y., lies a six-kilometer-long slip of sickly green water called Newtown Creek. Dubbed the most polluted waterway in America, this tidal tributary of the East River has no natural headwater: The water that feeds the mostly stagnant creek is a combination of industrial wastewater, stormwater runoff and, after a hard rain, raw sewage.

28 Aug 2008

Raindrop study splashes old assumptions

Predicting the weather has been central to human civilization since the Babylonians started studying cloud patterns in 650 B.C. The key to weather predictions is making correct assumptions. Today, instruments like Doppler radar that measure rainfall work under the assumption that raindrops fall at their terminal velocity. A new study, however, shows that some raindrops fall faster than they should, indicating rainfall instruments — and by extension, weather forecasts — may need some tweaking.

23 Jul 2009

Storing CO2 in fizzy water underground

Burying carbon dioxide in underground geologic formations is an attractive option for dealing with increasing carbon dioxide in the atmosphere. But before employing such schemes, researchers need to be sure that the greenhouse gas will actually stay put. Scientists have done everything from computer modeling to pumping vast amounts of carbon dioxide into the subsurface to find out if — and how — the gas might be trapped, but gauging how sealed the formations are over geologic time scales is difficult.

10 Nov 2009

Impossible Odds, Irrepressible Hope: Pakistan's water woes and the science that can solve them

Most residents of developed countries don’t think about their water running out or worry about their water leading to the death of their children. In Pakistan, those are distinct possibilities.

05 Oct 2010