I would like to understand whether an approximate relation between the rain and the physical properties of a particular terrain (composed of a specific material such as asphalt or clay or grass or plastic, etc.) exists as a function of time.
In this request, I'd like to understand, even in an approximate way, also which physical properties of the terrain the rain impacts. For instance, the friction or the absorption of water by the terrain.
Basically, I would like to get a better idea on the effect of the rain / water to terrains. I have a hard time even finding material on this.