Estimativa de geração de lixiviado em um aterro sanitário no semiárido paraibano utilizando o MODUELO 4.0

Abstract

The purpose of this study is to estimate the generation of leachate in a landfill in the semi-arid region of Paraíba using MODUELO 4.0. Using hydrological, morphological and climatic data from the landfill located in the city of Campina Grande, in the semiarid region of Paraíba. Various scenarios were simulated with different operational conditions for filling and covering the landfill, using natural soils from the region. Statistical analyses using the Coefficient of Determination (R²) of 0.60 and Pearson's Correlation Coefficient (r) of 0.77 showed a strong correlation between the estimated flow rate in simulation 13 and the observed flow rate. Despite the variability in the model's performance, there was a significant increase in the accuracy of the simulations over time, reducing the PBIAS to 59.31% in SIM14, especially in the months with observed data. The study concludes that MODUELO 4.0 is a useful tool for landfill management in the Brazilian semi-arid region, and can assist in decisionmaking and compliance with environmental regulations.