**6. Conclusion**

Considering the hydrographic basin of the Lluta river as a case study, it is naturally characterized by a marked imbalance of the water-soil-vegetation system, which, associated with human activities and extreme hydrometeorological phenomena, gives it a torrential hydrological behavior that causes significant drag. With devastating effects of solids with alluvial load, which affect extreme damage to the lower part of the Lluta valley and the mouth of the beach area of the city of Arica.

Reflecting on the results of the analysis obtained for the entire basin in general, it can be concluded that it has a character of high torrentiality and susceptibility to erosion due to the basic conditions of the relief and the drainage system. The behavior regarding about the hydrological response of the basin is fundamentally determined found by the morphometric attributes of the catchment basin, in the upper course of the Lluta river. Thus, the middle and lower basin are very strongly influenced by the hydrological behavior of the upper basin.

In relation to the part and process elements studied, the hydro geomorphological chart is presented as a very complete tool, although it has deficiencies. The great dynamics offered by hydrographic systems require this type of cartography, which must be subject to a periodic updating system, updating its database, to like the process proven with regular digital cartography. Likewise, this product must be developed for all the basins susceptible to a process like the one presented, even more, considering the variables of climate change.
