Question

Explain different sources of water. Which is suitable for us and why?​

Answer 1

Explanation:

Here are more than 5 sources of water and the conventional sources are listed first.

• Oceans and Seas (marine): saline or salty water that comprises the 7 seas and ocean(s) and cover 71% of the earth. The concentration of salt in seawater (salinity) is about 35 parts per thousand. This is the largest water source with an estimated volume of 1.332 billion cubic kilometers.
• Rain Water: when evaporated water cools and coalesces in the atmosphere, it falls back to earth in the form of rain. Cisterns and barrels were used used for ages to catch this fresh water, however air pollution has changed the quality of the water around the world. The pH can vary depending on contaminants present in the air from 4.5 to 7.7. Very low pH produces acid rain.
• Glacial or Ice Melt: Glaciers are a composite of different snow falls which accumulate over the millennia. They advance and retreat over time. Retreating glacier often contribute ground up surface material called rock flour that lends a blue color characteristic of glacial lakes. Otherwise ice is salt and mineral free.
• Surface Water: lakes, rivers, ponds and streams are supplied by rainfall and ice melt. Mostly fresh water, depending on runoff, lakes can be clear or murky and generally contain organic elements from bacteria to alligators.
• Ground Water: Ground water seeps into the earth through porous soil and fractures in surface rocks. It then collects into underground reservoirs or aquifers. The oxic-anoxic character depends on distance from the source and mobility of the subsurface water. Typically the deeper the water the more brackish it becomes.
• Other Sources: On Earth most of the water is thought to originate from comets when the planet was young.  
• Volcanic eruptions can contain 60% water vapor.  
• Some water is created on the earth by combustion of fuels such as burning hydrogen.

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