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Hydrology

Hydrology studies the movement and distribution of water across planets.

500 Questions

Are tides caused the Earth rotating?

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Not directly. The tides are caused by the gravity of the moon and, to a lesser degree, the sun. Since gravity decreases with increasing distance from an object, the moon's gravitational pull on Earth is strongest on the side facing the moon and weakest on the side facing away. This results in what we call tidal bulges on those sides, which correspond to high tide. As Earth rotates the side facing the moon changes. When the moon is on horizon and rising the tide will be low. Six hours later, when Earth's rotation brings us closest to the moon, high tide will occur.

What percentage is earth fresh water?

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Of all the water on Earth, around 2.75% of it is fresh drinking water.

What conditions will increase the rate of evaporation?

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Heat speeds up the rate of evaporation.

Where is most of the Fresh water on Earth?

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Short Answer:

Of all fresh water on Earth, 69% is frozen. And, even it it melts through global warming, most of it goes into the ocean. Basically, all the water we get is either from rain or what is pumped up from the rapidly diminishing aquifers.

There is not really much fresh ware on Earth. 1.74% of all Earth's water is in this frozen form as ice caps, glaciers and snow.

Only 0.75% of Earth's water is liquid water and potentially accessible as fresh water in ground water, lakes, streams and swamps.

Long Answer:

About 97.5% of water on Earth is salt water and 2.5% fresh water.

All of the oceans are salt water and the oceans represent more than 96% of all water on Earth.

Of the 2.5% fresh water, only 0.3% is in liquid form on the surface. Most of the rest is frozen or underground. Less than .01 % of all water is in lakes and rivers.

A breakdown of the various forms of water is as follows, going from the largest to the smallest.

96.5000% Oceans, Seas, bays

1.7400% Ice caps, glaciers, snow

0.9400% Saline Groundwater

0.7600% Fresh groundwater

0.0220% Ground ice and permafrost

0.0070% Fresh Lakes

0.0060% Saline Lakes

0.0010% Soil moisture

0.0010% Atmosphere

0.0008% Swamps

0.0002% Rivers

0.0001% Biological
In rivers, lakes, in the atmosphere, in the water table, and as ice held on land in the form of snow and glaciers (especially the antarctic and Greenland).
99% of all the water on the Earth is not considered fresh water. Only one percent is. It is in lakes, rivers, streams, icecaps on mountains and frozen in the polar caps or glaciers. See the related link for more information.

How much usable fresh water is there on Earth?

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Around 8 to 10 million cubic miles of Earth's water is considered fresh water, of which some 6 to 7 million cubic miles (more than two-thirds) is frozen in glaciers and the ice caps in Greenland and Antarctica.

What alignment of the earth moon and sun cause the spring and neap tides?

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The Earth's 23.5 degree tilt with respect to the orbital or ecliptic plane causes the Sun to rise higher in the sky during the summer months and lower in the winter months.. The spring and autumnal equinoxes correspond to the days on which the Sun is positioned directly over the equator and is observed to rise directly in the Eastern sky, resulting in exactly the same amount of daylight and nighttime everywhere on Earth.

What is the total volume of fresh water on earth in volume?

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The volume of all fresh water on Earth would be about 8 to 10 million cubic miles. That sounds like a lot except that 2/3 of that is frozen into glaciers and the ice caps in Greenland and Antarctica.

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Estimates vary on the percent of the Earth's water that is fresh, but it is only about 2.5 to 3% of the Earth's water. Most of this fresh water is frozen in the ice caps (Greenland and Antarctica) and in glaciers.

NASA says Earth's total water content is about 1.39 billion cubic kilometers (331 million cubic miles) and that 2.5% of that is fresh water. (And 68.9% of it is locked up in glaciers) The US Geological Survey says that up to 3% of the world's water is fresh.

(see related link)

How do tides change on Earth?

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the penguins in Antarctica swim around in the sea and are very strong, so they pull and push the tides till all over the world.

Most of the fresh water on Earth exists where?

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Short Answer:

Of all fresh water on Earth, 69% is frozen. And, even it it melts through global warming, most of it goes into the ocean. Basically, all the water we get is either from rain or what is pumped up from the rapidly diminishing aquifers.

There is not really much fresh ware on Earth. 1.74% of all Earth's water is in this frozen form as ice caps, glaciers and snow.

Only 0.75% of Earth's water is liquid water and potentially accessible as fresh water in ground water, lakes, streams and swamps.

Long Answer:

About 97.5% of water on Earth is salt water and 2.5% fresh water.

All of the oceans are salt water and the oceans represent more than 96% of all water on Earth.

Of the 2.5% fresh water, only 0.3% is in liquid form on the surface. Most of the rest is frozen or underground. Less than .01 % of all water is in lakes and rivers.

A breakdown of the various forms of water is as follows, going from the largest to the smallest.

96.5000% Oceans, Seas, bays

1.7400% Ice caps, glaciers, snow

0.9400% Saline Groundwater

0.7600% Fresh groundwater

0.0220% Ground ice and permafrost

0.0070% Fresh Lakes

0.0060% Saline Lakes

0.0010% Soil moisture

0.0010% Atmosphere

0.0008% Swamps

0.0002% Rivers

0.0001% Biological
In rivers, lakes, in the atmosphere, in the water table, and as ice held on land in the form of snow and glaciers (especially the antarctic and Greenland).
99% of all the water on the Earth is not considered fresh water. Only one percent is. It is in lakes, rivers, streams, icecaps on mountains and frozen in the polar caps or glaciers. See the related link for more information.

What is difference between hydrology and hydrogeology?

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Hydrology is the study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and environmental watershed sustainability.

Hydrogeology (hydro-meaning water, and -geology meaning the study of the Earth) is the area of geology that deals with the distribution and movement of groundwater in the soil and rocks of the Earth's crust.

How would a faster rotating of earth effect the tides?

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the gravitational pull would have less of an effect because it's moving at a faster speed. And since the gravitational pull is what causes the earth's tides, then they would most likely be less effected.

What are some examples of hydrology?

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  1. Rainfall
  2. Runoff
  3. Catchment
  4. Infiltration
  5. Groundwater
  6. Flood routings
  7. Sedimentation

What causes earth to have tides?

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The Moon is the cause for tides rising and falling

What happens to timber when heated?

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Slowly heated timber would simply dry and become classed as seasoned. If steam is used, the timber would become pliable, and could be bent - resulting in the curved handle on a walking-stick, for instance.

How much fresh water makes up the earth?

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Ninety-eight percent of the water on the planet is in the oceans, and therefore is unusable for drinking because of the salt. About 2 percent of the planet's water is fresh, but 1.6 percent of the planet's water is locked up in the polar ice caps and glaciers. Another 0.36 percent is found underground in aquifers and wells. Only about 0.036 percent of the planet's total water supply is found in lakes and rivers. That's still thousands of trillions of gallons, but it's a very small amount compared to all the water available

WhWhat percentage of Earth's water is fresh water?

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About 3% and only 1% is able to be drank. The rest is frozen in ice caps and glaciers.

Where do the water bulges occur on earth during the tides?

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bulges of water in the ocean are called high tides.

When the sun moon and earth are all in line tides?

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When the moon is either 180 degrees from the sun, or aligned with it.

That is, if you could draw a straight line from the sun to the earth and out into space beyond, if the moon lands anywhere on that line, you have spring tides.

In that alignment, you'll have either a new moon or a full moon.

What causes the tides to rise and fall and fall on Earth?

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The tidal effect (guess where it got that name) caused by the gravity of the Sun and Moon.

Is there water on other planets or this one?

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not really because of global warming glaciers are melting and because of amount of water we are wasting every day when all the glaciers will melt none amount of water will be left so save water and electricity because lot of water is used to generate electricity.

How is the fresh water replenished on earth?

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In nature, "freshwater" is produced by the "water cycle" through the evaporation of "fresh or clean" water molecules from the contaminated surface water, and then the condensation of that water within the atmosphere, resulting in rain.