What significant problem might arise when groundwater is heavily pumped at a coastal site quizlet?
What significant problem might arise when groundwater is heavily pumped at a coastal site? If the groundwater withdrawal exceeds recharge, the saltwater will become high enough to be drawn into the wells.
What problem is caused by pumping groundwater for irrigation in the southern high plain quizlet?
What problem is caused by pumping groundwater for irrigation in the Southern High Plain? A low precipitation rate and a high evaporation rate allow little water to recharge the aquifer.
When water is pumped from a well drawdown occurs Which of the following is a true statement regarding drawdown quizlet?
When water is pumped from a well, drawdown occurs. Which of the following is a true statement regarding drawdown? Drawdown decreases with increasing distance from the well.
How does the movement of groundwater in a near surface local system contrast with that in a deep regional system?
Groundwater movement in a near-surface local system generally sinks down at recharge areas and loops up at discharge areas. In contrast, groundwater movement in a deep regional system generally flows laterally toward the direction of decreasing gradient.
What significant problem might arise when groundwater is heavily pumped at a coastal site?
This is most often caused by human activities, mainly from the overuse of groundwater, when the soil collapses, compacts, and drops. Excessive pumping in coastal areas can cause saltwater to move inland and upward, resulting in saltwater contamination of the water supply.
Why does groundwater discharge to earth’s surface?
The water falls to the earth as precipitation such as rain hail sleet and snow. When precipitation reaches the earth's surface some of it will flow along the surface of the land and enter surface water like lakes streams and rivers as runoff. … This movement of water underground is called groundwater flow.
When groundwater is withdrawn from an unconfined aquifer by a pumping well what happens to the water table nearby?
surface the well is defined as a flowing artesian well. The zone around a well in an unconfined aquifer that is normally saturated, but becomes unsaturated as a well is pumped, leaving an area where the water table dips down to form a cone shape.
How does surface water affect groundwater?
Surface water seeps into the ground and recharges the underlying aquifer—groundwater discharges to the surface and supplies the stream with baseflow. USGS Integrated Watershed Studies assess these exchanges and their effect on surface-water and groundwater quality and quantity.
How does surface water and groundwater affect each other?
Surface water (including rivers, lakes, reservoirs, wetlands, estuaries, etc.) interacts with groundwater almost everywhere on Earth. This interaction takes place through the loss of surface water to groundwater, seepage of groundwater to surface water body, or a combination of both.
What happens when groundwater is over pumped?
Excessive pumping can lower the groundwater table, and cause wells to no longer be able to reach groundwater. As the water table lowers, the water must be pumped farther to reach the surface, using more energy. In extreme cases, using such a well can be cost prohibitive.
How does groundwater pumping cause land subsidence?
Land subsidence occurs when large amounts of groundwater have been withdrawn from certain types of rocks, such as fine-grained sediments. The rock compacts because the water is partly responsible for holding the ground up. When the water is withdrawn, the rocks falls in on itself.
Where does groundwater go?
Groundwater discharges into lakes, streams, and wetlands. This usually occurs as underground seepage. However, you may have seen a spring before, such as in the picture below. A spring is a visible discharge point at the land surface.
How does groundwater get into the ground?
Water gets into the ground mostly through snowmelt and rain seeping into the soil, broken rocks underneath the ground and through overland flow in channels, such as creeks, streams, rivers and ponds. The water infiltrating the underground moves gradually, driven by gravity, into the saturated zone of the subsurface.
What happens to water table when groundwater is pumped from well?
Pumping from a well in a water table aquifer lowers the water table near the well. This area is known as a cone of depression. The land area above a cone of depression is call the area of influence.
What happens to the water table if groundwater is pumped out faster than it can be replaced?
What happens to the water table if groundwater is pumped out faster than it can be replaced? A cone of depression forms on the water table. Which of the following is/are a setting(s) where surface water becomes groundwater? the ability of water to flow through a material.
What causes groundwater depletion?
Ground-water depletion is primarily caused by sustained ground-water pumping. Some of the negative effects of ground-water depletion include increased pumping costs, deterioration of water quality, reduction of water in streams and lakes, or land subsidence.
How does the groundwater level go down?
Pumping water out of the ground faster than it is replenished over the long-term causes similar problems. The volume of groundwater in storage is decreasing in many areas of the United States in response to pumping. Groundwater depletion is primarily caused by sustained groundwater pumping.
How does groundwater become surface water?
Groundwater and surface water are interconnected; groundwater becomes surface water when it discharges to surface water bodies. Most streams keep flowing during the dry summer months because groundwater discharges into them from the zone of saturation – this flow is called baseflow.
What is formed when the underground water seeps to the surface?
Water that infiltrates Earth's surface becomes groundwater, slowly seeping downward into extensive layers of porous soil and rock called aquifers. Under the pull of gravity, groundwater flows slowly and steadily through the aquifer. In low areas it emerges in springs and streams.
What happens when water is pumped out of a well?
When a well is pumped, the nearby water starts flowing in immediately, draining the ground around the well while the more distant water flows in to replace that which entered the well.
What causes land to subside?
Land subsidence is a gradual settling or sudden sinking of the Earth's surface owing to subsurface movement of earth materials. The principal causes of land subsidence are aquifer-system compaction, drainage of organic soils, underground mining, hydrocompaction, natural compaction, sinkholes, and thawing permafrost.
What happens when water hits the ground?
Water seeps into the ground much like a glass of water poured onto a pile of sand. As water seeps into the ground, some of it clings to particles of soil or to roots of plants just below the land surface. This moisture provides plants with the water they need to grow.
Why is groundwater decreasing?
Pumping water out of the ground faster than it is replenished over the long-term causes similar problems. The volume of groundwater in storage is decreasing in many areas of the United States in response to pumping. Groundwater depletion is primarily caused by sustained groundwater pumping.
Why has the water-level has gone down at some places?
Scanty Rainfall Since there is less rainfall, less rainwater seeps into the ground. In such a situation, much more groundwater is drawn out by the people for various purposes than gets replenished by rainfall. This results in depletion of water table.
How does the groundwater return to the surface of the land?
Pulled by gravity, groundwater moves from hills into valleys and discharges directly into wetlands, rivers and lakes. A spring may appear where a water table intercepts a ground surface.
How does groundwater leave the ground?
Water moves underground downward and sideways, in great quantities, due to gravity and pressure. Eventually it emerges back to the land surface, into rivers, and into the oceans to keep the water cycle going.
What happens to groundwater once it seeps underground?
The part that continues downward through the soil until it reaches rock material that is saturated is groundwater recharge. Water in the saturated groundwater system moves slowly and may eventually discharge into streams, lakes, and oceans. Sources/Usage: Public Domain.
How is groundwater related to surface water?
Surface water seeps into the ground and recharges the underlying aquifer—groundwater discharges to the surface and supplies the stream with baseflow. USGS Integrated Watershed Studies assess these exchanges and their effect on surface-water and groundwater quality and quantity.
What effects are associated with groundwater pumping?
A related effect of groundwater pumping is the lowering of groundwater levels below the depth that streamside or wetland vegetation needs to survive. The overall effect is a loss of riparian vegetation and wildlife habitat. The basic cause of land subsidence is a loss of support below ground.
How can pumping of groundwater cause subsidence?
The reduced water pressure is a loss of support for the clay and silt beds. Because these beds are compressible, they compact (become thinner), and the effects are seen as a lowering of the land surface. The lowering of land surface elevation from this process is permanent.