17-09-2017 · Essay on water cycle facts
The amount of water in the atmosphere at any moment in time is only 12,900 cubic kilometers, a minute fraction of Earth’s total water supply: if it were to completely rain out, atmospheric moisture would cover the Earth’s surface to a depth of only 2.5 centimeters. However, far more water—in fact, some 495,000 cubic kilometers of it—are cycled through the atmosphere every year. It is as if the entire amount of water in the air were removed and replenished nearly 40 times a year.
Essays on Cycle Ki Aatmakatha In Hindi - Essay Depot
And so begins the adventure of Droplet, the water molecule, as he enters the great water cycle- condensation, precipitation, infiltration, runoff, and evapotranspiration-and starts his journey home.
When precipitation falls over the land surface, it follows various routes in its subsequent paths. Some of it evaporates, returning to the atmosphere; some seeps into the ground as soil moisture or groundwater; and some runs off into rivers and streams. Almost all of the water eventually flows into the oceans or other bodies of water, where the cycle continues. At different stages of the cycle, some of the water is intercepted by humans or other life forms for drinking, washing, irrigating, and a large variety of other uses.
The sun is the driving force of the water cycle
The water, or hydrologic, cycle describes the pilgrimage of water as water molecules make their way from the Earth’s surface to the atmosphere and back again, in some cases to below the surface. This gigantic system, powered by energy from the Sun, is a continuous exchange of moisture between the oceans, the atmosphere, and the land.
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The remaining 30 percent of the annual precipitation ( 429 cubic miles) is transported through the other surface and subterranean processes of the water cycle to a stream, lake, or ocean.