I want to drill a well at home. I don't know 100 meters of flat land is equivalent to how many meters vertically? Some people say that 3 meters is equal to 1 meter.

Answer supplement

Slope-the ratio of the vertical height h to the horizontal width l of a slope is usually called slope (or slope ratio) and is represented by the letter I.

There are four methods to express slope: percentage method, degree method, density method and fraction method, among which percentage method and degree method are more commonly used.

Percentage method

The most commonly used method to express the slope, that is, the percentage of the height difference between two points and its horizontal distance, is calculated as follows: slope = (height difference/horizontal distance) x 100%.

When expressed as a percentage,

That is, I = h/l× 100%

For example, a slope of 3% means that the horizontal distance rises (falls) by 3 meters every 100 meters; 1% means every 100m in the horizontal direction and every 1m in the vertical direction.

Therefore, the verticality of the slope with 1: 0.25 should be 400 meters upward (downward) in the vertical direction for every horizontal distance of 100 meters.