GEOLOGY EXPERTS ONLY What is an aquifier? Describe the factors that determine th
ID: 106438 • Letter: G
Question
GEOLOGY EXPERTS ONLYWhat is an aquifier? Describe the factors that determine the rate at which groundwater can be extracted from an aquifier. Define specific yield and safe yield GEOLOGY EXPERTS ONLY
What is an aquifier? Describe the factors that determine the rate at which groundwater can be extracted from an aquifier. Define specific yield and safe yield
What is an aquifier? Describe the factors that determine the rate at which groundwater can be extracted from an aquifier. Define specific yield and safe yield
Explanation / Answer
Acquifier
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. ..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. A well is a hole drilled into the ground to penetrate an aquifer.
Factors that determine the rate at which groundwater can be extracted from an acquifier-
When a water-bearing rock readily transmits water to wells and springs, it is called an aquifer. Wells can be drilled into the aquifers and water can be pumped out.Precipitation eventually adds water (recharge) into the porous rock of the aquifer. The rate of recharge is not the same for all aquifers, though, and that must be considered when pumping water from a well. Pumping too much water too fast draws down the water in the aquifer and eventually causes a well to yield less and less water and even run dry. In fact, pumping your well too much can even cause your neighbor's well to run dry if you both are pumping from the same aquifer.
Specific yeild and safe yield-
Specific yield is defined as the volume of water released from storage by an unconfined aquifer per unit surface area of aquifer per unit decline of the water table.
Safe yield of a groundwater basin or aquifersystem is defined as the amount of water that can be withdrawn from it without producing an undesired effect. Undesired effects can manifest as: Reduced discharge of groundwater to surface water features. Reduction in ecological base flows.
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