**5. Conclusions**

In present work, the RCI has been obtained assuming that, exclusively, similarly to what happens on Earth, the soil loss on surface is caused mainly by the action of runoff water that circulates down slope.

It is evident that the collected data to date, in relation to the relationship between erosion and rainfall, are insufficient to be able to reach a reliable conclusion. However, a possible more global development, of the presented RCI, valid for all planets, may be important when deciding the fate of future missions to Mars, especially with regard to the study of the action of water on Martian landscape.

Studies on this field have been carried out on Earth, which is why it will be necessary to start from these in order to develop algorithms, or mathematical models, capable of predicting, or calculating, the action of water globally (interaction between soil, possible existence of organisms on the surface and atmosphere).

For this reason, it is evident that future missions to Mars must be developed under the supervision of a multidisciplinary team of experts in all areas of knowledge, that is, biologists, physicists, chemists, astrophysicists, geologists, computer scientists, aerospace engineers and agronomical engineers among others.
