Comparison of visual risk assessment methods applied in street trees of Montevideo city, Uruguay

Risk assessment of urban trees is an incipient practice in Latin America, generally performed with foreign methods, due to the lack qualified personnel and locally validated or adapted methodology. This article evaluates application three methods on street Montevideo city, Uruguay: Tree Hazard Evaluation Treatment System (THREATS), Quantified Assessment (QTRA) Best Management Practices - (ISA BMP). Three assessors similar experience applied 36 widely used genera, totaling 324 assessments 1,296 data. The were decomposed into components: Likelihood Failure, Impact, Consequence Rating. data statistically analyzed through a generalized linear mixed model (p<0.05), for factors: assessor, method, genus, their interactions. Results showed no significant differences among assessors, but there specifically Impact Rating components. ISA BMP method presented higher means these last two Still, this suggested until more appropriate developed local conditions. Highlights No found which encourages standard training all assessors. highest results likelihood impact risk rating. Target occupation rate influenced genera component. Montevideo, developed. absence descriptors categorizations, as well time, need be improved.