Monitoramento e modelagem hidrológica de pavimentos permeáveis em solos subtropicais

Abstract

Low Impact Development (LID) techniques have been applied for their numerous benefits in mitigating the impacts of increasing urbanization. Among them are the permeable pavements that reduce volumes and improve the quality of rainwater, allowing rainwater to seep into its structure and can be easily integrated into urbanized cities. To prove their benefits, these structures are usually monitored over a long period of time. When this is not possible, hydrological modeling techniques are applied in order to simulate its behavior. Provided that, adequate modeling and easy-to-use tools are essential to provide subsidies for the design and construction of such systems. Thus, the present work aims to develop and evaluate the performance of a simplified model with low data requirements for hydrological simulation of permeable pavements. For this, experimental modules and permeable coating parking spaces installed in the Santa Maria region (RS) were monitored. Monitoring was performed using low cost level rain gauges and sensors developed for this application. The modeling was done by applying the Puls method, assuming that permeable pavements work in a similar way to reservoirs, where the water outlet occurs through the process of infiltration into the soil. The results of the simulations proved to be satisfactory, for the Nash-Sutcliffe coefficient (NSE) values were found that would vary between 0.66 and 0.97 and for the coefficient of determination (R²) values between 0.72 and 0.98. In this way, the Puls method proved to be efficient in hydrological simulations on permeable pavements and can be a viable alternative, simple to use and without the need for large volumes of data.