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 ?
Burrowing activity was identified as porewater pressure spikes that exceeded four times the SD of the recorded pressure signals.
of wetland surface waters and sediment porewaters as well as precipitation and local groundwater inputs in the form of seeps, springs, and streams.
Diel coral reef acidification driven by porewater advection in permeable carbonate sands, Heron Island, Great Barrier Reef.
Soil temperature in the top 2 cm was measured with a digital thermometer and probe and porewater salinity was measured with the paste method on a single sediment core (Richards 1954).
Gas migration through low-permeable rock formations is controlled not only by the hydraulic and mechanical properties of the rocks (intrinsic permeability, porosity, rock strength), but also by the gas pressure and the hydro-mechanical state of the rock (liquid saturation, porewater pressure) [12].
Nutrient circulation and fate in the hyporheic zone are monitored on a nearly real-time basis using a porewater multiplexer pumping system attached to automatic water quality probes.
On average, the ammonium in porewater from the surrounding aquitard is 3.
3+] ions diffuse through porewater to more neutral pH areas, they will hydrolyse, releasing secondary acid back to solution.
Typically, concentrations of soluble sodium and chloride in soil porewater were less than 60 mg/1, but near B19, where incursions of seawater during storm surges have salinized the alluvial terrain, background concentrations were an order of magnitude greater [(Na.
Consolidation settlement is decrease in voids volume as porewater is squeezed out of soil, occurs slowly according to permeability.
Evidence from whole-sediment, porewater, and elutriate testing in toxicity assessment of contamined sediments.
With little to no root/rhizome fraction to support, rhizophytic algae may have a competitive edge in the LLM where sediment porewater nitrogen and phosphorus pools are often half that of seagrass meadows elsewhere along the Texas coast (Kowalski 1999).