Studies carried out to know the hydrographic characteristics of the basin or study area, in order to determine the volume or expenditure of rainwater that impacts on the area of ​​interest, associated with a certain return period, depending on the type of project to be developed. .

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Geohydrological studies are focused on surveying the subsoil in order to find favorable beds or strata for the extraction of water from wells. However, they can be used for other geological purposes.