groundwater

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groundwater

Water below the earth's surface, saturating soil and rock at the level of the water table and below. It supplies approximately 35 percent of the drinking water in the country and, as such, is a source of much concern for the Environmental Protection Agency. If one purchases a property with contaminants, and those contaminants have leached into the groundwater, then remediation will usually be required before development can proceed.

References in periodicals archive ?
where [S.sub.r] is the degree of saturation of seabed, [p.sub.w0] is the absolute static pressure and [K.sub.f] is the bulk modulus of pore water.
Additionally, it was shown that the use of horizontal drainage results in the decrease of the pore water pressure inside the slope and avoids surface erosion and progressive slope failure.
The samples collected here showed relatively high concentrations of orthophosphate of 0.15 mg.[L.sup.-1] in the water column and 0.48 mg.[L.sup.-1] in the sediment pore water, as well as high concentrations of total phosphorus in the sediment (1,445.59 mg.[kg.sup.-1]).
This set of flow tests suggested that at large deformations and high strain rates the pore pressure should exceed the networks' ability to contain it, resulting in a partial breakdown of the network and a large leak of pore water. This is consistent with the speculation that deviations of experimental stress-strain curves from Eq.
The first ordination axis was correlated significantly (p < 0.05) with the pore water pH measured in October (r = -0.49) and with the EC measured in June (r = -0.35).
indicate that Ca--K-zeolite applications of 4 and 8 g/kg soil increase the pore water velocity by 35% and 74%, respectively.
In compacted clays, electrostatic forces between the negatively charged clay surfaces and the anions affect transport of anionic species, and generally, this interaction results in a smaller volume of pore water available for anion transport, a phenomenon called anionic exclusion (Muurinen and Lehikoinen, 1995).
Total pore water and exchangeable ammonium was extracted from the sediment using 2M KCI (5), and the ammonium concentration was determined by the phenol hypochlorite method (7) .
Besides enhancing vegetation growth, paper sludge also minimizes erosion of the tailings caused by winter and water, reduces acid generation and runoff, and lowers metal concentrations in vegetation and pore water.
Surface and pore water pH were studied at Peat Bay Wetlands, located at the Savannah River Site.
At the boiling point of water, 212 [degrees] F (100 [degrees] C), this pore water expands as a gas (steam), and can explode a pot if it can not escape.
For eight of the species, which are native to three different ecosystems in Colorado (alpine tundra, shortgrass steppe, and subalpine fen), the abundance and seasonal dynamics of soil amino acids were measured in soil pore water. This permitted us to test the hypothesis that soil amino acids are available for plant uptake in ecosystems other than the arctic and alpine.