**2. Application**

There are numerous works that show the utility or value of the hydrogeomorphological chart in the treatment or study of water basins and the planning of defenses against unexpected floods. In Ref. [1, 2], in their document, "An index for the hydrogeomorphological assessment of fluvial systems" points out that fluvial dynamics is the key not only to the functioning but also to the ecological, landscape, and environmental value of fluvial systems. If you want to conserve a river as an ecosystem and as an environmental corridor in the territory, first of all, its hydrogeomorphological dynamics must be protected, because this is what will guarantee the protection of each and every one of the elements of the system and its relationships. For this reason, the evaluation of the hydrogeomorphological functioning of river systems is essential to determine their ecological status, as well as their foreseeable trends, for which three evaluation parameters are considered:

• functional quality of the river system, including

i.naturalness of the flow regime,

	- i.naturalness of the layout and morphology in the plan,
	- ii. continuity and naturalness of the bed and longitudinal and vertical processes, and
	- iii.naturalness of the margins and lateral mobility;

i.longitudinal continuity,


### *Risk Reduction DOI: http://dx.doi.org/10.5772/intechopen.109404*

Hydrogeomorphological cartography, as shown in **Figure 1**, is a document with particular characteristics aimed at being a tool that serves to mitigate water risks with the purpose of supporting the results of the application of a set of measures aimed at reducing risk and eliminating vulnerability, that is, physical, social, and economic. Thus, mitigation also constitutes one of the most important activities, since it allows actions to be carried out in advance, with the purpose of significantly reducing the expected consequences of an event. This stage is the most efficient and economical in terms of investment of resources and social cost, and of infrastructure and the environment.

#### **Figure 1.**

*Hydrogeomorphological chart of the Lluta river, Arica and Parinacota region, Lluta river basin slope map.*
