Name
Evaporation losses from urban canopy interception: effects of tree species and crown control practices
Date & Time
Monday, May 25, 2026, 11:45 AM - 12:00 PM
Description
Stormwater management is a critical challenge in urban environments, particularly under extreme weather events. Urban tree canopies play an important role in intercepting precipitation, thereby reducing runoff. However, the influence of different urban tree species as well as maintenance practices on evaporation losses from canopy interception remains poorly understood. This project aims to understand the influence of early crown control practices and species-specific morphological traits on evaporation losses from canopy in urban environments. Throughfall was measured using containers placed on the ground under 108 trees in an experimental plantation located in Saint-Bruno-de-Montarville (Québec, Canada). The trees had an average diameter at breast height of 7.35 cm and an average total height of 4.75 m. Interception ratios were compared across six species (silver maple, honey locust, northern hackberry, 'Accolade' elm, western catalpa, and bur oak) and four crown control treatments (pruning, placing a shading cap on the terminal shoot, a stake, and a control). During the summer of 2024, interception ratios varied between 16.6 % and 80.4 % across the 12 studied events. Results indicate that different crown control techniques have a negligible effect on interception, whereas interception rates significantly varied among species. Quantifying these differences will inform urban forest management and green infrastructure planning to maximize the ecosystem services delivered by urban tree canopies.
Location Name
DSU 303
Full Address
Dalhousie University
Halifax NS
Canada
Session Type
Oral Presentation
Abstract ID
284
Speaker Organization
Université du Québec en Outaouais (UQO)
Session Name
H3 (1 of 2)
Co-authors
Annick St-Denis (UQAM and ISFORT-UQO), Christian Messier (UQAM and ISFORT-UQO), and Audrey Maheu (ISFORT-UQO)
Presenting Author
Ariane Veillette-Lebrasseur (ISFORT-UQO)