if you refer to the speed of the water as it falls, it is at 9.8m/s
71 million gallons
1mm
110 000 m3 (average); see also http://en.wikipedia.org/wiki/Niagara_Falls.
150,000 gallons per seconed
The amount of time it takes for 3,000,000 gallons of water to flow over Niagara Falls depends on the time of year. During the high flow season, 6 million cubic feet flows over the Falls every minute on average. During low flow season, about 4 million
There are actually three falls at Niagara. The most spectacular is the Horseshoe Falls, which is almost entirely in Canada. By far, the greatest amount of water flows over the Horseshoe Falls. A much smaller amount flows over the American Falls, and a relatively little amount flows over the Bridal Veil Falls.
The flow of water is continuous
the Canadian side
There are actually three falls at Niagara. The most spectacular is the Horseshoe Falls, which is almost entirely in Canada. By far, the greatest amount of water flows over the Horseshoe Falls. A much smaller amount flows over the American Falls, and a relatively little amount flows over the Bridal Veil Falls.
Because most of the water falls from rain and gets wider and longer every time it rains and flows,
About 3.24 billion (3.24*1010) gallons of water per day flows over Niagara Falls.
when water falls on a cemented ground the cemented ground can't absorve water much and the water flows away.
Six million cubic feet (168,000 cubic meters) of water flow over the crest every minute during high flow.
The water from Victoria Falls falls approximately 360 feet, or 108 meters.