How long would it take to fill the Grand Canyon with water?

The canyon is 446 kilometres long by an average of 16 kilometres wide and 1.6 kilometres deep, which gives a volume of about 10 million billion (1016) litres. So by simple division Daisy would take about 1.8 million million (1.8 × 1012) years to fill the canyon.



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If you poured all the river water on Earth into the Grand Canyon, it would still only be about half full. It's so big that you could fit the entire population of the planet inside of it and still have room!

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If the Grand Canyon basin was filled, it would fill a lot of canyons, tributaries and river canyons beside the Grand Canyon both upstream and downstream.

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This natural landmark formed about five to six million years as erosion from the Colorado River cut a deep channel through layers of rock. The Grand Canyon contains some of the oldest exposed rock on Earth. The mile-high walls reveal a cross section of Earth's crust going back nearly two billion years.

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Bring your big-boy shovel—and a calculator. Around the world, countries have filled in bodies of water with “reclaimed land.” These range from ornamental uses in Dubai to straightforward waterfront fills. We'd need 1,000 cubic miles of dirt to fill the Grand Canyon.

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Finally, beginning just 5-6 million years ago, the Colorado River began to carve its way downward. Further erosion by tributary streams led to the canyon's widening. Still today these forces of nature are at work slowly deepening and widening the Grand Canyon.

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An average human has a volume of about 66.4 L and the Grand Canyon is reported to have a volume of L. That means, you could put people in the Grand Canyon (assuming you ground them up so that you could pack them in). There's only people on the planet, so you wouldn't get close to filling the canyon.

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Right now, there is only about 7 million acre-feet flowing into the Canyon in 2022. But levels are still declining, and we are getting closer to the point where Glen Canyon Dam cannot generate electricity, and potentially even worse, where water really can't safely flow through the dam at all.

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Located east of the Philippines, the Mariana Trench is massive. It is 120 times larger than the Grand Canyon and includes millions of acres virtually unknown to humans.

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Precipitation falling on the Coconino (South Rim) and Kaibab (North Rim) Plateaus creates Grand Canyon's only native waters - waters derived in place - as they percolate through porous, faulted, and fractured rock units to discharge later as springs and seeps below the canyon's rim.

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Knowledge of all water sources within Grand Canyon is incomplete. A partial inventory was done in 1979 over a 1,881 square mile area of the park which found 57 perennial water sources, 21 of which are streams and 36 which are seeps.

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Called the Mariana Trench, the underwater canyon descends 35,827 feet (10,920 meters) — the Grand Canyon only averages about 4,000 feet (1,200 meters) in depth.

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The Colorado River through Grand Canyon averages 300 feet (91 m) across and about 40 feet (12 m) deep. The average flow is between 12,000 and 15,000 cubic feet per second (cfs).

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Zhemchug Canyon (from the Russian ??????, pearl) is an underwater canyon located in the middle of the Bering Sea. It is the deepest submarine canyon in the world, and is also tied for the widest.

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If you decide to hike in the Canyon, take at least four litres of water for each day and lots of food. You will need a map too. Your mobile phone won't work here, as there is no signal, so make sure your friends and family know exactly where you are and how long you plan to hike.

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