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Water resources are natural resources of water that are potentially useful for humans, for example as a source of drinking water supply or irrigation water.
Sources of water are surface water, groundwater and above surface water. Water is the main substance required for all living organisms. It is also used for domestic purposes, industries, agriculture, etc.
There are numerous sources of water ranging from underground sources to surface sources. Oceans, ponds, lakes, rivers, springs, aquifers, and streams are some of the main water sources in the world. All these sources are essential for people’s well-being.
Earth's water is (almost) everywhere: above the Earth in the air and clouds, on the surface of the Earth in rivers, oceans, ice, plants, in living organisms, and inside the Earth in the top few miles of the ground. For an estimated explanation of where Earth's water exists, look at this bar chart.
The water on the surface of Earth is found mainly in its oceans (97.25 percent) and polar ice caps and glaciers (2.05 percent), with the balance in freshwater lakes, rivers, and groundwater. As Earth’s population grows and the demand for fresh water increases, water purification and recycling become
Source water refers to bodies of water that provide water to public drinking water supplies and private wells. These bodies of water can include rivers, streams, lakes, reservoirs, springs, and water under the ground.
About 97% of the water on the Earth’s surface is covered with water. The three main sources of water are: Rainwater. Groundwater – This includes water bodies like Wells and Springs. Surface water – This includes different water bodies like Reservoirs, Rivers, Streams, Ponds, Lakes and Tanks.
Freshwater on the land surface is a vital part of the water cycle for everyday human life. On the landscape, freshwater is stored in rivers, lakes, reservoirs, creeks, and streams. Most of the water people use everyday comes from these sources of water on the land surface.
Water is an inorganic compound with the chemical formula H2O. It is a transparent, tasteless, odorless, [c] and nearly colorless chemical substance. It is the main constituent of Earth 's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent [20]).
Water, which covers around 70 percent of the Earth's surface, comes in the forms of freshwater and saltwater. It can be found all over the world, in virtually every region no matter how dry it may appear.