e-book When Rain Falls

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Fortunately for everyone, water is a renewable resource that moves in a cycle with neither beginning nor end but, you can put in your vote as to where you think it begins.

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Water vapor evaporated from oceans , lakes , forests, fields, animals, and plants condenses and returns to Earth as precipitation , once again replenishing reservoirs, lakes , rivers , underground aquifers , and other sources of water and providing the moisture required by plants and animals The amount of precipitation that falls around the world may range from less than 0. One of the driest spots on Earth is Iquique, Chile, where no rain fell for 14 years.

The world's wettest spot, as shown by data collected from a rainfall gage operated by the USGS, is on Mt. Waialeale, Hawaii , where an average of more than inches of rain falls each year, and where more than inches fell from July to July Although Mt. Waialeale averages slightly more rain per year, Cherrapunji, India, holds the single year record of inches measured in By contrast, the conterminous the 48 "lower" states United States receives enough precipitation during an average year to cover the States to a depth of about 30 inches.

This is equivalent to about 1, cubic miles of water each year. What happens to the water after it reaches the ground depends upon many factors such as the rate of rainfall, topography, soil condition, density of vegetation, temperature, and the extent of urbanization. Wide spread flooding in Lithia Springs, Georgia just west of downtown Atlanta, after epic rainfall, 22 Sept. Impervious surfaces and urban buildup causes rainfall to runoff much quicker, and with greater flooding consequences, during heavy rains.

Credit: NASA. In a more natural or undeveloped area, the direct runoff would be considerably less. In the United States, an average of some 70 percent of the annual precipitation returns to the atmosphere by evaporation from land and water surfaces and by transpiration from vegetation.


The remaining 30 percent eventually reaches a stream, lake, or ocean, partly by overland runoff during and immediately after rain, and partly by a much slower route by moving though the ground. Much of the rain that enters the ground filters down into subsurface water-bearing rocks aquifers and eventually reaches lakes, streams, and rivers where these surface-water bodies intercept the aquifers.

The portion of the precipitation that reaches the streams produces an average annual streamflow in the United States of approximately 1, billion gallons a day. By comparison, the Nations's homes, farms, and factories withdraw and use about billion gallons a day Have you ever wondered how much water falls onto your yard during a rainstorm? Using a 1-inch rainstorm as an example, the table below gives example of how much water falls during a storm for various land areas.

Consider for a moment how much rainwater some cities may receive during a year.

For example, Atlanta, Ga. In a city the size of Atlanta, the per capita water use is about gallons per day or 40, gallons per year.


Thus, the water from a year's precipitation, if it could be collected and stored without any loss, would supply the needs of about 2,, people. Once on the land, rainfall either seeps into the ground or becomes runoff , which flows into rivers and lakes. What happens to the rain after it falls depends on many factors such as:. The following equivalents show the relationship between the volume and weight of water and between the volume and speed of flowing water. Geological Survey, Activity icon made by Eucalyp from www.

Proyecto Oniric - When The Rain Falls

We all know that raindrops are shaped like teardrops, right? Actually, that is not true. The air is full of water, even if you can't see it. Higher in the sky where it is colder than at the land surface, invisible water vapor condenses into tiny liquid water droplets—clouds. When the cloud droplets combine to form heavier cloud drops which can no longer "float" in the surrounding air, it can start to rain, snow, and hail Ice and glaciers are part of the water cycle, even though the water in them moves very slowly.

Ice caps influence the weather, too. The color white reflects sunlight heat more than darker colors, and as ice is so white, sunlight is reflected back out to the sky, which helps to create weather patterns. Read on to learn how glaciers and ice caps are part of the water cycle. Perhaps you've never seen snow.

Water Basics Photo Gallery

Or, perhaps you built a snowman this very afternoon and perhaps you saw your snowman begin to melt. Regardless of your experience with snow and associated snowmelt, runoff from snowmelt is a major component of the global movement of water, possibly even if you live where it never snows. Real-time data available on these web pages are provisional data that have not been reviewed or edited. Other rain events are more "frontal" in nature, with large formations of featureless and uniform nimbostratus types of clouds bringing precipitation over a large area.

But often you see a landscape similar to.


Methane rain falls on Titan's north pole from cloudless skies | ertejecanthcobb.gq

When rain hits the ground it begins to flow overland downhill. It can go round and round, adding more and more layers of new ice. If the updrafts in a thunder cloud are strong enough, the hail stones can get pretty big before they become too heavy to stay up. Hail stones can range from pea size to golf ball size, and up! A new record for the largest hailstone ever was set in ! It fell on July 23, in Vivian, South Dakota. It was 8 inches in diameter, That could put a real dent in your day!

As More Rain Falls, Greenland Is Melting Faster

Hail can cause a lot of damage to buildings, cars, and especially crops. However, freezing rain can be even worse. Freezing rain occurs when the conditions are just "right. Now, when the super-cooled rain hits colder-than-freezing ground and objects near the ground such as roads, trees, and power lines —snap! Just like that, the about-to-freeze rain turns to ice.

The ice coats everything with a thin, sometimes transparent, frozen film. As more rain falls, the coating becomes thicker. The ice can become so thick and heavy that tree limbs snap and fall across power lines, or the power lines themselves just sag and sag until they snap. Clouds are the key element of the water cycle, since they are the transporters that move water from one place on Earth to another. The warmer the air, the more water it can hold. The warmer the oceans, the faster water evaporates from them.

Surface winds also increase evaporation.