Metzger_Groundwater

pdf

School

University of Kansas *

*We aren’t endorsed by this school

Course

104

Subject

Geography

Date

Oct 30, 2023

Type

pdf

Pages

Uploaded by AdmiralUniverseSardine22

Groundwater Flow. The diagram below shows the cone of depression around a single well. Assume a second well is placed next to this well, what will the cone of depression resulting from both wells be? The map below shows Indian Lake in northwest Ohio. Several islands are located in the middle of the lake. Home owners on these islands rely on individual wells for their water supply. Explain why some of these wells have to be than 80 feet deep to reach water. The cone of depression will form around both wells , depending on which Some wells have more than 80 feet deep well has the greater pressure system , water because they are located on the islands then the well will have a which lies within the lake . But these islands greater source of water , while the are formed due to accumulation and other will go dry . lithification of seelimentary to form solid rock which is deep and impermeable , so that water can not pass through it . Hence these islands have very deep wells .

The diagram below shows the groundwater flow under natural conditions. Draw a diagram showing how the flow of groundwater is altered if a well is place to the left of the stream? What will happen if we introduce a source of pollution on the extreme left of the diagram? E ↑ t my un , s 7 b Precipitation I water - B - Straum table I - My in -> - - / groundwater · - -> flow -> & S ⑤ Since ground water travels slow , the well will then become polluted .

True/False questions 1. The water table is the altitude (below ground) where the water level in a well will rise to when the well taps a confined aquifer. 2. Land subsidence occurs in areas underlain by highly fractured granite, which is readily dissolved by moving groundwater, especially when the water is slightly acidic. 3. Water can flow in streams even during periods of drought due to groundwater seeping into stream banks. 4. Artificial recharge to an aquifer can occur when people inject water down into a well to force it back into an aquifer so they can withdraw it later. 5. Big cities drill deep wells to tap naturally heated water because the heat kills bacteria and the water needs less treatment. 6. Bottled water often is advertised as "artesian well water." Artesian water is groundwater that is naturally filtered by an aquifer composed of fine, porous material—this artesian water can be put directly into bottles. 7. The porosity and permeability of an aquifer define its ability to yield water to wells in productive amounts. 8. For some wells along the coastline that are drilled into porous aquifers, pumps are turned off twice a day (during periods of high tides), since tides temporarily raise saline groundwater levels, causing saltwater intrusion into freshwater aquifers. 9. Cities prefer to use groundwater for drinking-water supplies because surface water is in constant contact with streambeds and, thus, contains a higher concentration of dissolved minerals and other substances that must be removed. 10. Excessive pumping of a well can reverse the natural flow of groundwater into a river, causing a fall in the water level in the river. 11. Most wells are shallow because a significant amount of water cannot be obtained from wells where the underground water level is deeper than about 500 feet; it is impossible at the moment to pump water that deep in the earth to the land surface. 12. Most wells used for irrigation, domestic and public-supply water use tap large open areas in subsurface rocks—including horizontal fissures, caverns, and lava tubes, which have connections to the land surface—thus allowing the aquifer to be recharged quickly by precipitation. 13. A cone of depression occurs when you drop your scoop of ice cream (made with groundwater) on the ground on a hot summer day. False False True True False False True False False True False False False

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version