what are the advantages and disadvantages of each source of water supply?

Answer 1

Pumping from wells: May be clean, or contaminated with anything from surface runoff to materials from old buried tanks (gasoline). Limited. Not always renewed from surface sources, so if pumping exceeds recharge, the source runs out- and may cause subsidence of the ground (cracks, etc.). May be extremely rich in dissolved solids. May be inexpensive.

Surface water: May be clean, or contaminated with surface runoff (agricultural waste, from pesticides to manure). Tends to be lower in dissolved solids, but may be rich in calcium (as dissolved limestone) locally. May be contaminated with biological organisms, including giardia. May be extremely inexpensive.

Glacial water: Older ice (not from top surface) may be extremely clean and free of atmospheric contamination. Limited. Sources are generally not close to locations of use. Expensive to transport.

Desalinization, including reverse osmosis and distillation: Production of clean water from saline or ocean water is energy-intensive, but frequently an option where no other sources are available. Production may be limited to regions where large quantities of inexpensive energy are available near the ocean. Expensive, and facilities may be vulnerable to natural disasters or sabotage.

Atmospheric condensation: Used in a few regions where ocean fog condenses on plants and surfaces (Namib Desert, etc.). Limited use for extremely small populations. Insufficient for agriculture.

Answer 2

Nematodes would be a good example, also enzymes used to control small flies. (utilizing a friendly bacteria) Advantages: Nourishment restores and widens the recreational beach. Structures behind beach are protected as long as the added sand remains. When erosion continues, beach nourishment does not leave hazards on the beach or in the surf zone. This is a big advantage when compared with "hard" beach stabilization structures like seawalls or groins. Seawalls may protect structures behind the beach, but they almost always cause the beach in front of the wall to become narrower. If erosion breaches the seawall, then debris from the wall will be left on the beach and in the surf. Since beach nourishment only puts sand on the beach, no debris is left when it erodes....!!

Answer 3

Sources might include streams, rivers, lakes, oceans, swamps, wells, artisan wells, distillation, rainfall, dew, melt ice, glaciers, recycled water, bottled water, vegetables & a few I have not thought of.
Streams - may be polluted or contain bacteria, can be very pure.
Rivers - as above, usually less pure
Lakes - as above, even more so
Oceans - as above, needs desalinated
Swamps - as above, more pure at outlet end usually
Wells - as above, and may have ground water contaminents
Artesian Wells - as above and may dry up due to water table fall
Distillation - good to purify a source,
Air Distillation - only useful in a desert if air humidity used
Rainfall - May be contaminated from air pollutants, not reliable
Dew - In some areas a dew collecting pond can be constructed
Melt Ice - can be very pure or see rainfall
Glacier - usually limited in supply
Recycled water - usually only useful in closed system eg. spaceship or a planet. More homes are reusing gray water
Bottled water - expensive
Vegetables - most people,get a lot of their daily water this way, with out realizing it. (most vegetables are 96-98% water) It can be very pure, very good for you and probably the heathiest way :) assuming the plants are not carring e-coli or tetnus

Answer 4

Read the 2-3 paragraphs that are in your environmental science books...

Advantages... Gives power?

Disadvantages... May cause problems with fish, and they usually have to build a way for them to get back to their fish homes... ;)

Answer 5

Stop cheating and actually read the chapter that your teacher assigned...how do you expect to ever learn anything?

Answer 6

Well, for Canada it attracts too much attention from the U.S.

Answer 7

I DONT KNOW