A Virginia Tech graduate student put a car battery and Hurricane Ivan to good use in his studies of sinkholes.
Benjamin Schwartz, a Ph.D. student in geosciences in the College of Science, who is from Doe Hill, Va., in Highland County, is using an innovative technique to characterize ground water movement in sinkholes. His goal is to recommend management strategies to reduce contamination of aquifers in regions that are rife with sinkholes. Hurricane Ivans downpour in Southwest Virginia allowed him to measure changes in underground water over a short 4-day period. Schwartz will present his findings at the 116th national meeting of the Geological Society of America in Denver on Nov. 7-10.
Sinkholes generally form over limestone and dolomite. That rock dissolves and the earth on the surface subsides. Water from the sinkhole either seeps into the subsurface or runs in through a fissure or cave opening and rapidly enters the aquifer. "People up and down the Shenandoah Valley get their water from aquifers," Schwartz said. "Often, these aquifers are contaminated. Sources of contamination include runoff from paved surfaces or because a good portion of Virginias agricultural land is on karst terrain. There is little filtration between surface water and karst aquifers." Karst is a term used for a landscape where water movement is underground because of the voids in the bedrock.
Susan Trulove | EurekAlert!
Predicting unpredictability: Information theory offers new way to read ice cores
07.12.2016 | Santa Fe Institute
Sea ice hit record lows in November
07.12.2016 | University of Colorado at Boulder
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
08.12.2016 | Physics and Astronomy
08.12.2016 | Health and Medicine
08.12.2016 | Life Sciences