US groundwater in peril: potable water supply less than thought

photo: a private, potable groundwater well in New Mexico, USA

Photo: A groundwater well near Estancia, New Mexico. Credit: Debra Perrone

The U.S. groundwater supply is smaller than originally thought, according to a new research study that includes a University of Arizona hydrologist.

The study provides important insights into the depths of underground fresh and brackish water in some of the most prominent sedimentary basins across the U.S.

The research by scientists from the University of Saskatchewan, the UA and … [more…]

Diverse forests are stronger against drought

photo: Aspens affected by drought. Credit: William Anderegg

Photo: Aspens affected by drought. Credit: William Anderegg

Resilient forests host trees with a diversity of water-use strategies

Diversity is strength, even among forests. In a paper published in Nature, researchers led by University of Utah biologist William Anderegg report that forests with trees that employ a high diversity of traits related to water use suffer less of an impact from drought. The results, which expand on previous work … [more…]

Oxygen Crisis in World’s Oceans

Oxygen Crisis in World's Oceans

In the past 50 years, the amount of water in the open ocean with zero oxygen has gone up more than fourfold. In coastal water bodies, including estuaries and seas, low-oxygen sites have increased more than 10-fold since 1950. Scientists expect oxygen to continue dropping even outside these zones as Earth warms.

To halt the decline, the world needs to rein in both climate change and nutrient pollution, an international … [more…]

Keeping Cows Cool With Less Water and Energy

Keeping Cows Cool With Less Water and Energy

Photo: cows cool off at UC Davis. (Paul Fortunato/UC Davis)

Innovative cooling technologies tested on dairy cows at the University of California, Davis, are addressing the long-standing challenge of keeping dairy cows cool in heat-stressed California. Standard livestock cooling methods, such as fans and sprinkling cows with water, require significant amounts of electricity and water.

The new technologies, being tested at UC Davis by the Western Cooling Efficiency Center and … [more…]