Earth is known as a blue planet because water covers 71% of its surface.
Water evaporates from the earth’s surface and is also present in the atmosphere as water vapour.
Surface water is defined as water that is present on the earth’s surface. Rivers, lakes, reservoirs, oceans, and streams are all part of it.
Surface water accounts for nearly 80% of all water consumed in daily life.
Even this water exists in two forms. The first is saline water, and the second is fresh water.
The ocean and saline lakes are the primary sources of this water.
The oceans contain nearly 97 percent of the earth’s water.
However, because ocean water has a high salinity, it is not suitable for drinking.
Experiments to make it drinkable have been conducted, but the costs have been prohibitively high.
Rivers, canals, lakes, reservoirs, and streams are common sources of fresh surface water.
They are present in very small quantities and are used for both drinking and irrigation.
Nonetheless, they meet many of the human’s fresh water requirements. Glaciers and other ice cover nearly 2.15 percent of the world’s fresh water supply.
They are rapidly melting as a result of global warming.
Ground water accounts for 0.61 percent of total earth water. It is the most common way for humans to meet their daily needs.
This water is drunk and used for irrigation in general. It is present in the state of complete saturation. It is nearly 80 times greater than surface water resources.
The water cycle, also known as a hydrological cycle, represents the recycling of water by the environment. The sea evaporates its water.
It is responsible for the formation of vapour and, later, clouds. Clouds rain on the earth, and the water is stored before flowing back to the sea via rivers.
These are some of the water resources that exist on Earth.
Final Answer:
Seas, oceans, rivers, springs, and tubewells are all examples of water sources on Earth.