What is slope gradient?

What is slope gradient?

Are you asking about the slope of the slope or what is slope and slope?
Slope refers to the road or channel on both sides of the excavation surface excavated into a certain slope during construction, some have cement or block stone or strip Stone cover, the tangent of the excavation surface or cover to the horizontal plane is called slope, which is usually expressed by the ratio, such as slope 1:2, which means that the horizontal distance is 2m, and the height difference is 1m
Another kind of slope is that the road surface or channel bottom descends along the longitudinal direction. It is expressed by sine a of the angle a of the road surface or channel bottom to the horizontal plane. When the angle is very small, it is replaced by the tangent of the angle A