How An aquifer is recharged? Most aquifers are naturally recharged by rainfall or other surface water that infiltrates into the ground. The stored water is available for use in dry years when surface water supplies
How An aquifer is recharged?
Most aquifers are naturally recharged by rainfall or other surface water that infiltrates into the ground. The stored water is available for use in dry years when surface water supplies may be low.
What is the permeability and porosity of an aquifer?
Porosity is a description of how much space there could be to hold water under the ground, and permeability describes how those pores are shaped and interconnected. This determines how easy it is for water to flow from one pore to the next.
How permeable and porous Would an aquifer be?
An aquifer is a body of saturated rock through which water can easily move. Aquifers must be both permeable and porous and include such rock types as sandstone, conglomerate, fractured limestone and unconsolidated sand and gravel. However, if these rocks are highly fractured, they make good aquifers.
What is the relationship between porosity permeability and good aquifers?
The properties that make a good aquifer are those that increase the storage of water (porosity) and increase the flow of water (permeability) within that layer. Porosity is the proportion of empty space in a rock. Permeability is a measure of the ease with which liquids and gases can pass through a rock.
How fast can the aquifer be recharged?
Depending on its permeability, aquifers can gain water at a rate of 50 feet per year to 50 inches per century. They have both recharge and discharge zones. A recharge zone usually occurs at a high elevation where rain, snowmelt, lake or river water seeps into the ground to replenish the aquifer.
What is the difference between porosity and permeability?
More specifically, porosity of a rock is a measure of its ability to hold a fluid. Permeability is a measure of the ease of flow of a fluid through a porous solid. A rock may be extremely porous, but if the pores are not connected, it will have no permeability.
How is porosity related to permeability and aquifers?
Porosity, Permeability and Aquifers Porosity, Permeability and Aquifers porosity– the amount of empty space in a rock or other earth substance; this empty space is known as pore space. Porosity is how much water a substance can hold. vocabulary
How is permeability related to the flow of water?
Permeability is a measure of how easily [&water&] can pass through material. [&Water&] [&flows&] quickly through material with high permeability and flows very slowly through material with low permeability. If you imagine pouring [&water&] into a bucket of gravel, the [&water&] will [&flow&] around the stones rather quickly.
How are the pore spaces in an aquifer replenished?
Aquifers are replenished when surface water infiltrates through the ground and refills the pore spaces in the aquifer. This process is called recharge. It is especially important to ensure that recharge is clean and uncontaminated or the entire aquifer could become polluted.
Which is an example of low permeability in the ground?
Aquitards have very low permeability and do not transfer water well at all. In fact, in the ground they often act as a barrier to water flow and separate two aquifers. A good example of an aquitard is a layer of clay.