Use este identificador para citar ou linkar para este item: http://hdl.handle.net/123456789/1668
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dc.contributor.authorBrasil, José Bandeira-
dc.date.accessioned2025-09-18T14:20:59Z-
dc.date.available2025-09-18T14:20:59Z-
dc.date.issued2025-
dc.identifier.citationBRASIL, J. B. Incertezas dos modelos de energia cinética para estimar a erosividade da chuva em região semiárida. TCC (Pós-graduação lato sensu em Recursos hídricos para o semiárido) - Instituto Federal de Educação, Ciência e Tecnologia do Sertão Pernambucano, Campus Salgueiro, Salgueiro, PE, 2025.pt_BR
dc.identifier.urihttp://hdl.handle.net/123456789/1668-
dc.description.abstractThe Brazilian semi-arid Northeast plays a critical role in regional hydrology, where rainfall is marked by pronounced temporal variability and short duration, presenting significant challenges for understanding and managing hydrological and erosive processes. This study aims to evaluate the performance of empirical models for estimating rainfall kinetic energy (KE) and erosivity index (EI30) in this region, for all events and erosive events, using high-resolution rainfall data collected at the Federal University of Cariri (UFCA), Ceará. A total of 283 natural rainfall events were analyzed, with KE and EI30 values calculated using multiple models: Wischmeier and Smith, USDA, Van Dijk, a temporal variation-based model (KE_VT), and a regional model developed for Brazil’s semi-arid zone, which served as the reference. The results show a predominance of small rainfall events (<5.2 mm), though maximum EI30 values exceeded 1300 MJ ha−1 mm h−1 , highlighting the potential for extreme erosive events. Comparative analysis revealed that all international models significantly underestimated KE and EI30 values compared to the regional reference, with the KE_VT model showing the closest approximation (13% underestimation), for all events and erosive events. Statistical assessments using the Wilcoxon test, Nash–Sutcliffe efficiency, and Willmott concordance index confirmed the superior performance of the KE_VT, for all events and erosive events. These findings underscore the importance of considering intra- event rainfall variability and regional calibration when modeling erosivity in semi-arid climates, contributing to more effective soil conservation and hydrological planning.pt_BR
dc.subjectCiências Agráriaspt_BR
dc.subjectUSLEpt_BR
dc.subjectÍndice de erosividadept_BR
dc.subjectErosão do solopt_BR
dc.subjectIntensidade da chuvapt_BR
dc.titleIncertezas dos modelos de energia cinética para estimar a erosividade da chuva em região semiáridapt_BR
Aparece nas coleções:Recursos hídricos para o semiárido

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