What is an aquitard quizlet?
An aquitard is a zone within the earth that restricts the flow of groundwater from one aquifer to another. Aquitards comprise layers of either clay or non-porous rock with low hydraulic conductivity.
What is an aquitard?
Definition of Aquitard: Poorly permeable underground layer that limits the flow of groundwater from one aquifer to another. This is the common definition for Aquitard, other definitions can be discussed in the article. An aquifuge is an absolutely impermeable unit that will not transmit any water.
What is an aquitard or aquiclude?
Aquitard:A geologic formation, group of formations, or part of formation through which virtually no water moves. Aquiclude:A saturated, but poorly permeable bed, formation, or group of formations that does not yield water freely to a well or springs.
What is the difference between and aquifer and an aquitard?
Aquifers are underground layers of very porous water-bearing soil or sand. Aquitards, by contrast, are compacted layers of clay, silt or rock that retard water flow underground; that is, they act as a barrier for groundwater. Aquitards separate aquifers and partially disconnect the flow of water underground.
Which of the following materials would make the best aquitard?
In general, gravel, sandy materials, limestone, or highly fractured rocks make good aquifers, whereas clay-rich, poorly sorted sediments, and unfractured rocks often form aquitards.
What is the difference in porosity and permeability between an aquifer and aquitard?
Porosity is a measure of how much of a rock is open space. Permeability is a measure of the ease with which a fluid (water in this case) can move through a porous rock. What is the difference between an aquiclude, an aquitard and an aquifer? The sand aquifer would be most effective.
Which is an example of an aquitard?
Saturated sediment or rocks through which water may move easily is called an aquifer. Sands, sandstones, gravels, and conglomerates are good examples of aquifers. A sediment or rock in which rock tends to move slowly is an aquitard. Shales, clay, and many crystalline rocks are good examples of aquitards.
Which of the following is an example of aquitard?
A confining unit or aquitard is characterized by low permeability that does not readily permit water to pass through it. Confining units do, however, store large quantities of water. Examples include shale, clay, and silt.
What is the key characteristic of an aquitard?
An aquitard is a zone within the Earth that restricts the flow of groundwater from one aquifer to another. A completely impermeable aquitard is called an aquiclude or aquifuge. Aquitards contain layers of either clay or non-porous rock with low hydraulic conductivity.
What would make the best aquitard?
Good aquifers are those with high permeability such as poorly cemented sands, gravels, or highly fractured rock. An aquitard is a body of material with very low permeability. In general, tightly packed clays, well cemented sandstones, and igneous and metamorphic rocks lacking fractures are good aquitards.
Which acid is responsible for most karst topography?
Types of Karst Carbonic acid karst is the most common type of karst and accounts for over 90 percent of all karst terrain on Earth. Typical of car- bonic acid karst is the recharge of water at the surface through sinkholes and caves, and the discharge of that water to springs in nearby river valleys.
Which of the following would make a good aquitard?