The ground plays an important role in maintaining a clean environment by serving as a natural water filtration and purification system, said Henry Lin, professor of hydropedology and soil hydrology. Understanding the components that make up this integral part of the ecosystem can lead to better groundwater management and smarter environmental policy.
"We look at nature and we see all the beauty and all the prosperity around us," said Lin, "But most people don't know or tend to forget that the key to sustainability is right underground."
Lin, who reports on his research today (Feb. 17) at the annual meeting of the American Association for the Advancement of Science in Boston, said that the earth's outer layer -- from the top vegetation canopy to the strata of soils and layers of underground material -- helps soak up and purify water by extracting excess nutrients, heavy metals and other impurities. The ground can also act as a storage container for freshwater.
About 60 percent of the world's annual precipitation ends up in this zone, Lin said. "In fact, there is more water under the ground than there is in the so-called 'blue waters,' such as lakes and rivers," said Lin.
Besides using freshwater for drinking, people use large amounts of water to irrigate agricultural fields and as part of industrial operations. The researcher said that just as a global green revolution raised awareness about food security, a "blue revolution" may lead to efforts to water security with clean, safe water supply around the globe.
"Without water there is no life," Lin said. "Without groundwater, there is no clean water."
Lin said that the system is currently under threat from poor land management practices that fail to consider how ground water is affected by land uses, such as new building projects, underground storage and agricultural operations. Planners should consider, for example, how the ground and plants in an area can affect water run-off. In some cases, not taking the ground and underground features of an area into consideration can lead to flooding, or to the addition of impurities into drinking water supplies.
Besides reaching out to managers and planners, Lin said that the general public also must become more aware of groundwater management issues.
"In a lot of cases, for the general public and even people from government agencies and funding agencies, it's out of sight, out of mind," Lin said. "But, beneath the surface lies the foundation of our sustainability."
Matthew Swayne | EurekAlert!
Waters are more polluted than tests say: Standard toxicity analyses come up short
30.11.2015 | Technische Universität München
Don't forget plankton in climate change models, says study
27.11.2015 | University of Exeter
Chemical weathering of rocks over geological time scales is an important control on the stability of the climate. This weathering is, in turn, highly dependent...
Before the fluid of the middle ear drains and sound waves penetrate for the first time, the inner ear cells of newborn rodents practice for their big debut. Researchers at Johns Hopkins report they have figured out the molecular chain of events that enables the cells to make “sounds” on their own, essentially “practicing” their ability to process sounds in the world around them.
The researchers, who describe their experiments in the Dec. 3 edition of the journal Cell, show how hair cells in the inner ear can be activated in the absence...
Planet Earth experienced a global climate shift in the late 1980s on an unprecedented scale, fuelled by anthropogenic warming and a volcanic eruption, according to new research published this week.
Scientists say that a major step change, or ‘regime shift’, in the Earth’s biophysical systems, from the upper atmosphere to the depths of the ocean and from...
The Fraunhofer Institute for Solar Energy Systems ISE has installed 70 photovoltaic modules on the outer façade of one of its lab buildings. The modules were...
Nerve cells cover their high energy demand with glucose and lactate. Scientists of the University of Zurich now provide new support for this. They show for the first time in the intact mouse brain evidence for an exchange of lactate between different brain cells. With this study they were able to confirm a 20-year old hypothesis.
In comparison to other organs, the human brain has the highest energy requirements. The supply of energy for nerve cells and the particular role of lactic acid...
01.12.2015 | Event News
30.11.2015 | Event News
25.11.2015 | Event News
01.12.2015 | Life Sciences
01.12.2015 | Life Sciences
01.12.2015 | Earth Sciences