Estimativa por métodos empíricos da evapotranspiração: aplicação em um telhado verde tropical

Abstract

Green roofs (GRs) and other urban green spaces provide numerous benefits linked to evaporative processes, including mitigation of urban heat islands, storm-water management, and carbon sequestration, in addition to an increased visual comfort. Estimation of evapotranspiration (ET) was developed for agriculture applications, in the forecast of floods, in the construction and operation of reservoirs. This research was developed using a new green roof technique proposed by SILVA (2016), based on hydroponics with shallow rooting in a synthetic fibrous material, and had the objective to evaluate the interaction of climatological parameters in the green roof as the performance of empirical methods to estimate reference evapotranspiration (ETo): Hargreaves, Hargreaves-Samani, Bristow-Campbell, Turc, Priestley-Taylor, Jensen-Haise, BlaneyCriddle, and Makkink, compared to the standard Penman-Monteith method (PM-FAO 56) under the climatic conditions of metropolitan Rio de Janeiro, Brazil. The analyzes were performed considering four months, using the software Statistica 7, simple regression analysis, and Willmott concordance index and performance index. The results showed that substrate-free green roof performed similarly to substrate green roofs and suggested that les irrigation could be used than MEG (Modern Extensive Greenroofs) green roof.