Sentences with phrase «in shallow aquifers»

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.

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

Not exact matches

But Clarens says fracking fluids could theoretically leak into aquifers, because the wells must be dug through shallow layers where the aquifers lie in order to reach shales.

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

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.

Groundwater studies in shallow, porous aquifers using CFCs were conducted by, for example, Busenberg and Plummer, Cook et al., and Oster et al..

Active biogenic methanogenis is widespread in shallow fresh water aquifers thoughout the planet.

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.

In contrast to La Nina induced shallow - aquifer effects, deep aquifers have been filled with meltwater from the last Ice Age, and that water is slowly and steadily seeping back into the oceans today.

In some parts of the coastal area having very shallow immobile and continuous fresh water aquifers and scat - tered population, drinking water supply by means very low cost VSST and SST has been proved successful.

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 aquiferIn some cases, difficulty arises in determining the safe yield capacity of the shallow aquiferin 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.

Mean values ± standard deviation of methane concentrations (as milligrams of CH4 L - 1) and carbon isotope composition in methane in shallow groundwater δ13C - CH4 sorted by aquifers and proximity to gas wells (active vs. nonactive)

Given the intimate connection between river water and widespread alluvial aquifers it is clear that there must be stong seasonal change in «shallow groundwater» temperature many metres below the surface.