Sentences with phrase «shallow aquifers»

Although fracking has unlocked new fuel sources and slashed energy prices, there is a risk that toxic compounds in the fracking fluid can get into shallow aquifers via fractures in the bedrock.

Our study revealed a type of saline water in shallow aquifers, particularly along valleys in northeastern Pennsylvania, that resemble the unique geochemical composition of the Marcellus brine.

Their results identify where deeply buried aquifers likely exchange water with shallow aquifers or discharge to the surface water system.

From a hydrological point of view, these valleys are regional discharge areas, and are the most likely places to see this hydraulic connectivity between shallow aquifers and deep formations.

During the rainy season or the season of melting snow, any groundwater contribution is masked by heavy surface runoff and shallow aquifer effects.

Streams that dry up during a drought are usually supported by small shallow aquifers, while reduced but persistent river and stream flows must be maintained by large aquifers.

My final presentation was on using shallow aquifers to mitigate and adapt for climate change.

Records from disparate corners of the United States show that wells drilled to bury this waste deep beneath the ground have repeatedly leaked, sending dangerous chemicals and waste gurgling to the surface or, on occasion, seeping into shallow aquifers that store a significant portion of the nation's drinking water.

Previous studies have shown that naturally occurring methane in shallow aquifers is typically associated with a relatively strong biogenic signature indicated by depleted δ13C - CH4 and δ2H - CH4 compositions (32) coupled with high ratios of methane to higher - chain hydrocarbons (33), as we observed in Fig. 4B.

When we go for three, four or five months with shallow aquifers being drawn down to the point where we have to limit or ration high - quality water, who has the priority?»

A shallow aquifer beneath the Colorado River floodplain doesn't spring to mind as a hotspot for new forms of life.

That gravel is filled with water, a shallow aquifer that Needles taps to sprinkle its golf greens and feed its taps.

Most geologists see contamination of aquifers as unlikely because of the great difference between the depths at which fracking is carried out and the shallow aquifers from which we get our water.

The finding suggests that fracking operations are not significantly contributing to the leakage of methane from deep rock formations, where oil and gas are extracted, up to the shallower aquifers where well water is drawn.

«The requirements weren't as rigorous, the testing wasn't as rigorous and in some cases the shallow aquifers were contaminated,» Kobelski said.

The average monthly water levels show the difference in seasonal response of groundwater levels and highlight the importance of irrigation water as a source of recharge to the shallow aquifers (MBMGb undated).

Geologists say this potentially harmful fluid is unlikely to percolate up through a few kilometres of rock to reach the shallow aquifers that supply drinking water — but Avner Vengosh of Duke University in Durham, North Carolina, thinks the methane itself could do so.

The hydraulic fracturing process — pushing gallons upon gallons of chemical - laden water into shale rock in order to bubble up natural gas — takes place deep in the ground, thousands of feet below the earth's surface and thousands of feet below the shallow aquifers that provide drinking water.

PH: Shallow Aquifer is a picture I'd been looking to paint for some time, but without any real idea of what it was going to be, or how I was to go about doing it.

JMcK: Shallow Aquifer (2016) is just one of your paintings where you appear to have gathered treasures, allowed these jewels to resonate, and to assert the necessity of maintaining the ecological balance to future human existence.

This phenomenon has nothing to do with shale gas development (we do not see a geographic proximity between the brine water and natural gas wells that we saw with gases in the previously published data) but we infer that these areas are more vulnerable for possible migration of gas and water to shallow aquifers.

We define «unknown» because these are only the first published data and we only investigated the shallow aquifers but we do not know what actually is taking place at depth.

My concern is that many will read the title, «Geochemical evidence for possible natural migration of Marcellus Formation brine to shallow aquifers in Pennsylvania,» and immediately infer that residual treatment water (i.e., frack fluid) is most likely to leak into groundwater from depths of several thousand feet.

A large percentage of the 20 + million engine pump wells in operation in India were drilled manually and pump from shallow aquifers that are refilled each monsoon.

As expected, the youngest water is concentrated in the shallowest aquifer layers and the proportion of young water decreases with depth.

But in the coastal area, the salinity distributions in ground water and replenishment of water in deep and shallow aquifers are regulated by complex hydrogeolog - ical phenomena.

In some cases, difficulty arises in determining the safe yield capacity of the shallow aquifers.

The shallowest aquifer is usually not used because of contamination risks, but it has a lot of advantages in terms of receiving recharge and requiring less energy to use, as long as you don't drink it.

Carbon sequestration doesn't look quite as good if it causes a toxic mix of metals and organic substances to leak into shallow aquifers.

Records from disparate corners of the United States show that wells drilled to bury this waste deep beneath the ground have repeatedly leaked, sending dangerous chemicals and waste gurgling to the surface or, on occasion, seeping into shallow aquifers that store a significant portion of the nation's drinking water.

Between 820 and 1,460 billion gallons of this contaminated water are discharged per year to our shallowest aquifers.

Many of these wells have not been abandoned properly and could provide conduits for carbon dioxide to migrate to shallow aquifers or to the surface.

When most of the aquifers in India and the shallow aquifer under the North China Plain are depleted, the maximum rate of pumping will be automatically reduced to the rate of recharge.