how does an aquifer work and how do towns get water from them? and is there any good pics of aquifers?
470724
Aquifer , in hydrology, a porous layer of rock capable of storing, filtering, and releasing water. The rock layer, or stratum, contains many pore spaces which, when connected, form a matrix allowing movement of water through the rock.There are two types of aquifer: confined aquifers and groundwater aquifers.\n\nget pics on google
340588
I suppose you mean why is polluted ground water harder to get rid of??\n\nB/c it is in the ground. Groundwater found in aquifers can go hundreds of feet below the ground & can cover several hundred miles. Water in these aquifers "travel". Sometimes you can have pollution added in one place & it show up miles away in another.\n\nIt's not like you can keep up w/ everyone who is polluting it as well. There are point & non point sources of pollution. Point sources are identifiable ones that you can actually see. Non point sources are the worst b/c they are the ones that are hard to identify & cover larger areas such as fertilizers & pesticides.\n\nSo to sum it up...if you can't see where it is going or where it is located, you can't clean it up. And you can't exactly clean up an aquifer that covers that much area to begin w/.
84859
There are three ways actually:\n1. Rainwater soaks into the ground. Almost all soil will allow water to soak in and as it goes downward it encounters rock which also has small holes called pores that water can soak into. This is how water gets into wells that we drink from or use for irrigation. \n\nThe other two types do not always fit the definition of 'groundwater' but are found beneath the earth's surface:\n\n2. When rocks like sandstone are formed, they are mostly formed (deposited) beneath the ocean or under a river delta. They are filled with water when they form and this water is often trapped there by sediments like clay that deposit over the water filled sandstone. This water is often saltwater. \n\n3. When some rocks deep in the earth undergo a process called metamorphism they chemically expel water. Many rocks have water bound up as part of their chemical content and when this rock changes from pressure or heat the water is released. Some types of clay will also release water that is bound up chemically in the clay when they are buried and under higher temperature and pressure.
508819
I don't think there is an explanation currently.Despite other person's the answer below , you have to realise that , cerntainly in the UK , farmers use dowsers ( water diviners) to find wells.Farmers do not pay out good money if it doesnt work.\nThere is some movement towards an understanding at the web site below.If water has some sort of regular structure to it , then maybe there is a low frequency radiation that comes from it and , again , maybe , some people are sensitive to it.(Lots of maybes!)\nhttp://www.livescience.com/forcesofnature/041201_water_bonds.html
1072409
They fill naturally with water. \n\nOil is generally found in small pores in rock like sandstone or limestone. The pores range in size from hundredths of a millimeter, to a few millimeters in most cases. In some limestone a form of porosity can form that has much larger pores (vuggy porosity), ranging from centimeters to meters in size in the case of cavernous porosity.\n\nBelow the first few hundred feet of the earths surface all of the pores in rock are filled with water, or oil and natural gas. In most oil reservoirs the water that is there naturally is salt water. Most oil and gas reservoirs have a naturally high pressure when first found, and this natural pressure (often several thousand psi) drives the oil and gas upward and out of the well. Water pushes the oil and gas out of the well, replacing the oil and gas in the rock as it leaves the well. If water did not flow into the voids left by oil and gas, it would be impossible to pump oil out of a well. \n\nWhen the natural pressure is depleted the well is either abandoned or nearby wells can be used to inject more water and create artificial pressure to push the oil up out of the well.   \n\nIf you are wondering if the rock subsides or compacts as the oil is removed, in most cases it does not. The grains in the rock are well cemented and support each other regardless of what is in the pores. In the case of poorly cemented sandstones (called unconsolidated) there can indeed be some compaction and the surface can subside. This also happens with some water wells, and in some areas there has been significant subsidence from both water pumping and oil pumping.\n\nYou might be surprised to learn that in most oil wells only about 50% of the oil is ever recovered. Recovery can range from as low as 20-30% of the oil to as high as 60-70% of it when special methods are applied. Someday if we ever find a new technology that can recover more oil we may be able to go back to long-abandoned oil fields and pump more oil. Current methods of what is called secondary or tertiary recovery involve both water injection into special injector wells and carbon dioxide injection. The water or CO2 helps flush (push) more oil out of the underground sponge-like rock we call an oil reservoir.
86362
Nothing. The river just flows from it. If it has multiple sources or headwaters, however, then the actual river flows from the largest or main source, and is connected to the other headwaters through tributaries.
786425
http://www.wnrmag.com/supps/2006/apr06/aquifer.htm\n\nhttp://capp.water.usgs.gov/gwa/ch_j/J-text6.html\n\nhttp://wi.water.usgs.gov/pubs/hi_atlases.htm\n\nhttp://wi.water.usgs.gov/public/gw/MONTHLY/monthly.html
292745
It is very hard to understand what you are asking. Since groundwater is beneath the surface of the earth, it would generally not be considered to have 'landforms'. However, if there are any landforms in the water table they are what are called phreatic caves. These are caves that exist below the water table. Another sort of 'landform' that might exist within groundwater, or beneath the water table are the buried sedimentary features that exist within most sedimentary rocks. Examples of these would be sand bars, deltas, river channels, natural levees, carbonate platforms, incised valleys, alluvial fans, and just about any geomorphic feature that exists on the surface. \n\nAnother way to understand your question would be that perhaps you are asking about how surface landforms affect groundwater. The water table is often elevated under higher topographic features such as hills. Often there is a hydrostatic gradient where water is slowly moving through saturated aquifers downward toward valleys. This type of flow can even create artesian springs.
861405
New York City's water comes from lakes in the mountains of upstate New York.  It is held in resevoirs (such as the Croton Reservoir) north of the city and transported throughout the city via a tunnel system.
87965
We never get new water here on earth..it's just recycled. The water cycle defined is "Transition and movement of water involving evaporation, transpiration, condensation, precipitation, percolation, runoff, and storage."\n\nWater falls in the form of precipitation (snow, rain, etc). Some of it seeps into the ground that makes up our water aquifers (perculation), some is in the form of runoff (rivers, streams), eventually water makes its way to lakes, ponds, oceans, etc and is stored. Some water is taken up by plants and is stored there. It leaves "storage" when the water evaporates and through transpiration in plants (plants lose water through their leaves which is why they seem especially prone to wilting on a hot windy day).\n\nCondensation is when water goes from a gaseous state back to a liquid state. An example of this putting your breath on a cold window or mirror and watching the water droplets form.\n\nHope this helped. It's a simplified explanation, but it will get you started.
52661
after looking around at the usgs fl page for groundwater levels and recent precipitation records, i would guess that your water table has risen somewhat. from what i gather, this is normal fluctuation.  my answer is nothing more than a guess, because the data i looked at doesn't really support any other cause.  (all that just to say "I don't know.)
800487
2 sources of water, Comets & Subterrerain.\n\nWhat % of ponds does not make a question.
280684
Takes a lot of work.  If you are interested in becoming one.  Do some research.  There are many more requirements than just buying land cheap, putting utilities and water etc.  You have to go to the local town meetings and planning and zoning meeting to make sure you can get approved to develop land out.  Some land can only be used for specific things like agriculture so you can purchase it for cheap but all you can do is farm. You can petition to get the zoning laws changed. But it you do have your work cut out for you
634560
You don't give a location (country/city/town) so I don't know, but couldn't you ask your college professor for some ideas ... or some fellow students in the know.\n\nIf you are doing a home study course, another idea might be to make enquiries at your local water utility provider.  Make sure you speak to someone who has all the requisite qualificiations to help you.  Good luck!
461383
permenant streams can get their water from underground springs/aquifers, melting ice or snow from high elevation mountains or glaciers, or the drainage of a large landmass.
509700
All wells have a fresh water spring at the bottom. The water that enters is free to exit, and fresh water from the spring  flows in to replace the water that flowed out. \n\nThe water that is in a well is not exactly stagnant.\nThe water under the  ground is also pure because it is constantly moving through the silt and gets filtered. So the water that comes in is also pure and 'fresh' (though its been around for quite a while!).
724902
If you want free water, go collect it from the nearest lake or river. if you don't want to pay for the good view, buy a cheaper place with a nice view of a brick wall or cemetery. That's just the way it is.