In Colombia a lot of populations are located at piedemontes by environs of torrential rivers and constantly exposed to flash floods. Florencia, the capital city of department Caqueta, is one of them. Therefore the necessity to study this city that often has been scene of floods getting human deaths. Florencia is located at piedemonte of the Eastern slope on the Eastern mountain, characterized by high precipitation, made of convective and orographic processes. In order to study hazard flood in the city, historical, hydrometeorological and geomorphological information had to be integrated, using of hidrological series and fluvial interpretation of geophorms by satellite images, aerial photographies and field verificationing. A regional study of the watersheed was made to determine the torrentialiness of the Hacha river, that borders the city, where several drainages fill it and also have generated flash floods.This information is processed and analyzed to make urban cartography where susceptibility and hazard areas are classificated.