Aquifers

Major Aquifers and Ground Water Quality in Ohio

The carbonate aquifers in western Ohio consist mainly of limestone and dolomite and may reach a thickness of 300 to 600 feet. These aquifers are capable of yielding more than 100 gpm. Most of the ground water flow in carbonate aquifers is along fractures or bedding planes. An increase in the percentage of shale within the carbonate bedrock in ...

  Quality, Water, Major, Ground, Aquifer, Major aquifers and ground water quality

Basic Concepts of Groundwater Hydrology

AQUIFERS, AQUITARDS, AND SPRINGS A geologic formation from which significant amounts of ground water can be pumped for domestic, municipal, or agricultural uses is known as anaquifer. In some cases, aquifers are vertically separated from each other by geologic formations that permit lit-tle or no water to flow in or out. A forma-

  Water, Ground, Groundwater, Aquifer, Ground water

Water Well Design and Construction

aquifers or from the land surface into the well (bentonite is a special type of clay used to seal against water leaks). Then the driller develops the well (see Well Development), implements an aquifer test, completes the sanitary seal of the well head, and installs a pump and power source. Proper design, con-struction, development, and ...

  Well, Aquifer

Hydraulic Conductivity & Porosity

Aquifers, Aquitards, and Aquicludes ¥Aquifer: a saturated permeable geologic unit that can store & transmit significant quantities of groundwater under ordinary hydraulic gradients &/or can yield economic quantities of water to wells (i.e., store and transmit water) ¥Aquitard: permeable geologic unit capable of

  Hydraulic, Conductivity, Aquifer, Porosity, Hydraulic conductivity amp porosity

What Climate Change Means for Virginia - US EPA

of estuaries and aquifers. The southeastern United States has warmed less than most of the nation. But in the coming decades, the region's changing climate is likely to reduce crop yields, harm livestock, increase the number of unpleasantly hot days, and increase the risk of heat stroke and other heat-related illnesses.

  Virginia, Change, Climate, Climate change, Aquifer

Groundwater Quality and Groundwater Pollution

some highly porous or cavernous volcanic and karstic aquifers, groundwater speed may be 10,000 feet (roughly 2 miles) per year or more. Nonpoint source pollution therefore does not typically appear in domestic or irrigation wells until years or even decades after it was released from its source. By the same

  Groundwater, Aquifer

Chemistry of Iron in Natural Water - USGS

form a basis for computing the Eh within aquifers where this property cannot be measured directly. In aerated waters whose pH is above about 5, ferric iron can be present in excess of 0.01 ppm only as a suspension of oxide or hydroxide. The particles may be of colloidal size or larger.

  Iron, Aquifer

Flowing Artesian Wells - British Columbia

aquifers where the well intake is deep enough to intercept a zone where the hydraulic head is higher than the land surface (see Figure 2) . This situation typically occurs in groundwater discharge areas at lower elevations near rivers and lakes in valleys surrounded by steep slopes . The pressure of the groundwater typically increases

  Well, Aquifer, Santeria, Flowing, Flowing artesian wells

Ground Water Contamination G - EPA

landfills were often sited over aquifers or close to surface waters and in permeable soils with shal-low water tables, enhancing the potential for leachate to contaminate ground water. Closed landfills can continue to pose a ground water con-tamination threat if they are not capped with an impermeable material (such as clay) before closure

  Aquifer

USDA Natural Resources Conservation Service January 1998

through the soil, and in some cases move to aquifers, surface streams, or lakes. Corrosivity Soil pH is one of several properties used as a general indicator of soil corrosivity. Generally, soils that are either highly alkaline or highly acid are likely to be …

  Usda, Aquifer

Review of Emerging Resources: U.S. Shale Gas and Shale Oil ...

The information presented in this overview is based on the report Review of Emerging Resources: U.S. Shale Gas and Shale Oil Plays, which was prepared …