Os impactos causados por eventos de chuvas extremas no município de Floriano-PI no período de 2020-2023

Abstract

With the increase in urbanization in cities, there are changes in the local hydrological cycle, and one of the consequences generated is the formation of flooding in the city. That said, the present work had the general objective of analyzing the impacts caused by intense rainfall in the Brazilian municipality of Floriano in the state of Piauí, and three specific objectives, namely: carrying out a bibliographical review on the effects of urbanization on intense precipitation events, characterizing the legislation aimed at the management and/or management of rainwater in the municipality and analyze the rainfall data available between the years 2020 and 202. The methodology adopted was based on the bibliographical review and the plotting and analysis of rainfall data from an electronic station of the municipality. National Water Agency (ANA) between 2020 and 2023, in addition to comparing them with the rainfall intensity thresholds standardized by INMET. The study presented some information about the environmental conditions that generate and/or contribute to extreme surface runoff events, the main ones being unrestrained urbanization and the lack of management and/or management of rainwater. The rainfall data obtained showed that, in relation to the historical series, the average rainfall in the rainy period increased and in the months of transition to the dry period it decreased, that is, there was an increase in the amplitude of the rainfall in the analyzed period in relation to the historical data. Furthermore, it was possible to catalog all orange alert rains during the studied period.