TSUNAMI CASE FLOOD CHART - Hydrography and Navigation Directorate of Perú
Original (non-English) name
CARTA DE INUNDACIÓN EN CASO DE TSUNAMI - Dirección de Hidrografía y Navegación de Perú
Acronym
Citation
Abstract
Natural phenomena are frequent and the damage they cause, although unavoidable, can be mitigated through a set of pre-established procedures and actions. In the specific case of Tsunamis, this set of rules and actions constitute the Flood Letters drawn up by the DHN, which were made available to the competent authority of the coastal localities. These were used for the design and planning of evacuation routes and refuge areas, as well as the formulation of an evacuation plan, which the authorities of the coastal localities must have.
For the Determination of the Maximum Flood Limit in case of Tsunami, it is obtained considering oceanographic aspects, such as: height and direction of the waves and tidal heights (tidal reference levels), in addition to information on the geomorphological characteristics, slope and tachymetry of the front and back beach areas. The aforementioned information comes from the National Tsunami Warning Center (CNAT), which is complemented with cadastral data provided by the municipalities, in order to assess and identify evacuation routes and refuge areas. The methodology adapted for the determination of Run-Up and post-tsunami surveys is in accordance with the specifications of the IOC / ITSU / 13 manual.