Evaluation of the Flood Area in the Presence of Climate Change: Ravine La Ronda Case, Ricardo Palma, Peru

Abstract

In the district of Ricardo Palma, human settlements are located near streams, which are seriously affected during the heavy flooding season (rainy season), which increases due to the presence of the El Niño Southern Oscillation (ENSO) and the global effect of climate change. To get to know the flood zone 09 de Octubre - La Ronda, Ricardo Palma, software was applied to obtain the area of influence to study, and to know 10.5 software was applied to obtain the area of influence to study, and to know the rainfall record of the National Water Service. Meteorology and Hydrology of Perú(SENAMHI) for a continuous period of 27 years of maximum daily rainfall, with the HEC HMS 4.9 software the maximum design flows for different return periods were obtained, and the HEC RAS 6.2 software to obtain the flooding area. To find out the support of the authorities in the presence of the Niño Southern Oscillation (ENSO), and the global effect of climate change, a survey was carried out among the population, obtaining that 14.43% had the appropriate conditions to mitigate the impacts of the flooding due to intense rains, 22.93% received help in the presence of the El Niño phenomenon, and for 20.75%, there was a response from their authorities to the needs of the population in the presence of an emergency, and no changes that benefit the population were distinguished. The maximum design flows were calculated for a return period of 10 and 100 years, which vary between 31.7 m³/s and 61.2 m³/s, and that for a design flow of 61.2 m³/s, the flooding area of 0.25 km² was obtained.