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[1] [2] as a ratio of one part rise to so many parts run. For example, a slope that has a rise of 5 feet for every 1000 feet of run would have a slope ratio of 1 in 200. (The word "in" is normally used rather than the mathematical ratio notation of "1:200".) This is generally the method used to describe railway grades in Australia and the UK.
It is a dimensionless quantity, usually expressed in units of meters per kilometer (m/km) or feet per mile (ft/mi); it may also be expressed in percent (%). The world average river reach slope is 2.6 m/km or 0.26%; [2] a slope smaller than 1% and greater than 4% is considered gentle and steep, respectively. [3]
Typical values range from 2 percent for straight segments to 10 percent for sharp superelevated curves. It may also be expressed as a fraction of an inch in rise over a one-foot run (e.g. 1 ⁄ 4 inch per foot).
1 in 9 (11%) or 1 in 10 (10%) Estrada de Ferro Campos do Jordão, Brazil: 22 existing railways merged and nationalised in 1953 1 in 9.5 (10.5%) Roaring Camp & Big Trees Narrow Gauge Railroad, California, United States: 1963: 3ft narrow gauge heritage railroad 1 in 10 (10%) Sheffield Supertram, Sheffield, England: 1994 [2] 1 in 10.4 (9.6%)
An avalanche hit Little Cottonwood Canyon just outside of Salt Lake City over the weekend, coating the slope and neighboring roadway with several inches of snow. Fox Weather 3 hours ago
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Slope illustrated for y = (3/2)x − 1.Click on to enlarge Slope of a line in coordinates system, from f(x) = −12x + 2 to f(x) = 12x + 2. The slope of a line in the plane containing the x and y axes is generally represented by the letter m, [5] and is defined as the change in the y coordinate divided by the corresponding change in the x coordinate, between two distinct points on the line.
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