On October 29, the 'avenida relámpago' took place asoló el área metropolitana de Valencia llevaba un 30% sediments sobre el volumen total de la cida de agua, flour index “alto”, everything is normal regarding extreme meteorological events.
This is how it comes out of the studio la crecida de la rambla del Poyo carried out with the TETIS model of the Hydrological and Environmental Modeling Group (GIMHA) of that day, belonging to the Institute of Water and Environmental Engineering (IIAMA) of the University of Political Science of Valencia (UPV).
Félix Fransés, president of the Spanish Water Technology Platform and professor of Hydraulic Engineering at UPV, explained that The main thing is that the density increases by 50%.
The expert pointed out that the DANA de Valencia floods caused by the Rambla del Poyo and other ravines in the south of the capital are of the “avenida relámpago” type. “el incremento de caudales es muy rápido y se forma un frente de onda” que avanza rapidamente por la red de cauces”.
Arrastre de piedras, troncos, ramas y canas
According to Frances, this front creates a characteristic noise due to the cutting of stones, trunks, branches and reeds, among other materials, in such a way that se podría oír llegar la riada. You can do anything you need to, que disourse secos la mayor parte del año, y en cuencas con una fuerte pendiente y comparably pequeñas.
A todo esto se suma que se halan en clima que puedan generar rain storms, similar to the response time, the combination of these factors. provides “short reaction time”. for the emergency system.
Las velocidades que toma el agua, los picos de caudal y el transporte significado de sedimentos y detritos Eleva la densidas del flujo hydric According to the professor, it prefers to float and drag objects in the riad's path, such as vehicles.
La limpieza de sedimentos
La suma de estas properties provoca que la limpieza sedimentos de las plantas bajas, calles y alcantarillado sea, en general, one of the main costs of the recovery process tras una inundación In the special case of a sewage network, the cost of cleaning can be so high that sometimes a new total or partial construction of the network is resorted to.
The professor and president of the Spanish Platform for Water Technologies declared that the majority of victims are in developed countries Produce for 'avenidas relámpago' and is related to cars in some form. “Si además no está lloviendo en la zone que se va a inundar.” The mechanisms sound the alarm, the cocktail is ready to explode.”ha apostillado Francés.
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