Water is the only common substance that can exist naturally as a gas, liquid, or solid at the relatively small range of temperatures and pressures found on the Earth’s surface.
Following are the world's 10 longest rivers. Spread across the globe.
1. Nile (4,132 miles, 6,650 kms)
2. Amazon (4,000 miles, 6,400 kms) - carries more water than any river
Further, here's a map of 30 largest rivers and their drainage basins
Further, here's a look at population along some of the key river basins:
The scientists estimated that the total volume of water in Earth’s rivers on average from 1980 to 2009 was 2,246 cubic kilometers (539 cubic miles). That’s equivalent to half of Lake Michigan’s water and about 0.006 percent of all fresh water, which itself is 2.5 percent of the global volume. Despite their small proportion of all the planet’s water, rivers have been vital to humans since the earliest civilizations.
The map following shows the volume of water stored by hydrologic region. The researchers estimated that the Amazon basin (darkest blue) contains about 38 percent of the world’s river water, the most of any hydrologic region evaluated. The same basin also discharges the most water to the ocean (second map): 6,789 cubic kilometers (1,629 cubic miles) per year. That’s 18 percent of the global discharge to the ocean, which averaged 37,411 cubic kilometers (8,975 cubic miles) per year from 1980 to 2009.
In all, the Earth’s water content is about 1.39 billion cubic kilometers (331 million cubic miles), with the bulk of it, about 96.5%, being in the global oceans. As for the rest, approximately 1.7% is stored in the polar icecaps, glaciers, and permanent snow, and another 1.7% is stored in groundwater, lakes, rivers, streams, and soil. Only a thousandth of 1% of the water on Earth exists as water vapor in the atmosphere.
Water vapor—and with it energy—is carried around the globe by weather systems.
Throughout the hydrologic cycle, there are many paths that a water molecule might follow. Water at the bottom of Lake Superior may eventually rise into the atmosphere and fall as rain in Massachusetts. Runoff from the Massachusetts rain may drain into the Atlantic Ocean and circulate northeastward toward Iceland, destined to become part of a floe of sea ice, or, after evaporation to the atmosphere and precipitation as snow, part of a glacier.
Water molecules can take an immense variety of routes and branching trails that lead them again and again through the three phases of ice, liquid water, and water vapor. For instance, the water molecules that once fell 100 years ago as rain on your great- grandparents’ farmhouse in Iowa might now be falling as snow on your driveway in California.
(One has to think of a human life, a drop of water in the larger consciousness ocean/system. One could appear anywhere on the Earth, in any form. And keep circulating, until the planet lasts. One has to believe and have faith that whatever power put everything in motion follows the same fabric of core individual balance - it could be anything, anywhere, and it would be all, all completely accessible. All the rest of human business, sentimental toppling of people is just horizontal randomness. The divine magic is unlike anything human or even other scales/intermediates powers or anything with relativity concerns. It is all here, wherever one is. )
It could be a fisherman in a Congo river rapid, fishing for living, living below 'poverty line', and yet be completely content, whole, full of good sense and good cheer, a joy to himself and anyone around. It could be a newborn baby in one of the richest households in the world, it could be a young woman behind a burka figuring out her place in the modern world trying to find her best path forward in a world she sees on screen and one she lives in, and yet because the holiest resides inside, she be a joy full of good sense and good cheer to herself and anyone around her. Or it could be young man in a modern city finding his path and purpose in the changing materials of the world, making sense of history and the times to come and the role of a human being. Each one of us is made from that same core. Pretty much accessible in our being, that power. In the dailiness of our lives, and everyday preoccuaptions, the practical and the general relativity of the social world, one forgets, it dims. And perhaps it is not really a lot. It is just this little belief that the basic principle of equation, equity, balance is itself the only truth, that there is no point of consciousness where that power is not there, or is not available all. It made the world as a creative pursuit. And the truth and goodness ensures that it could breathe as anyone, any random point and just by being the best possible or doing the best it can with available materials, it realises the higher self inside. Just being is needed. Breathing, and trying to do the best. Quite simple. But one forgets. One forgets.)
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Nile
257 million people reside in the Nile basin. So Nile basin hosts 20% of African population
Eleven countries share the river: Burundi, the Democratic Republic of the Congo, Egypt, Eritrea, Ethiopia, Kenya, Rwanda, the Sudan, South Sudan, the United Republic of Tanzania and Uganda.
Lake Victoria with the surface area of 66,700 square kilometres is the world’s second largest freshwater lake after Lake Superior in North America.
Following are the Nile basin countries:
River discharge is the amount of water that passes a given point in a river over a specific period, essentially the river's flow rate. (typically measured in cubic meters per second (m³/s).)
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