ARBORICULTURE & CONTENTS URBAN FORESTRY Volume 46, No. 2, March 2020 Formerly the Journal of Arboriculture, 1975 – 2005 (Volumes 1 – 31) John Ball, Shane J. Vosberg, and Timothy Walsh A Review of United States Arboricultural Operation Fatal and Nonfatal Incidents (2001–2017): Implications for Safety Training ...........................................................................67 Abstract. The objective of this study was to identify and quantify the hazards present during arboricultural operations. The Occupational Safety and Health Administration Fatality and Catastrophe incident database and other Bureau of Labor Statistic sources were analyzed for arboricul- tural operation incidents within the 17-year period from 2001 through 2017. There were 865 fatal and 441 nonfatal incidents reviewed from this period. The leading four fatal incidents, from the largest to the smallest number of fatalities, were climber falls, workers struck by a falling tree, workers making indirect contact with an electric current, and workers struck by a falling branch. Climber falls were also the leading incident for severe nonfatal injuries, followed by ground workers struck by a falling branch, workers struck by a chain saw, and falls by aerial device operators. The American National Standards Institute Z133 American National Standard for Arboricultural Operations—Safety Requirements establishes safety requirements and recommendations for arboricultural operations in the United States. It addresses common hazard sources and has guidelines to avoid, eliminate, or reduce them. Safety training programs should emphasize the most common hazard sources for fatal and nonfatal incidents and follow the ANSI Z. Keywords. ANSI Z; Arborist Safety; Hazards; Incidents; Training. Mauricio Ponce-Donoso, Oscar Vallejos-Barra, Benjamin Ingram, and Gustavo Daniluk-Mosquera Urban Trees and Environmental Variables: Relationships in a City of Central Chile .............84 Abstract. We identified relationships between ecosystem services provided by trees and environmental variables, including temperature (°C at ground level and 1.5 m), relative humidity (%), particulate matter (PM10 , maximum and average), noise (dBA), and ultraviolet radiation (UV at 1.5 m). This study was carried out in Talca, Chile, a mid-sized city. Measurement locations were selected in three areas based along three main avenues in the center of the city during three different seasons and three different schedules of day, generating 15,515 data in total. In cir- cular plots, with 8 meter radiuses, measurements were recorded at the center and at a point on the perimeter. A correlation matrix was calculated and an ANOVA was conducted with canopy cover, schedule of day, and season as variation sources. The results show a high dispersion, and the correlation matrix that canopy coverage has a weak relationship with variables was studied. The results of the ANOVA showed the least number of significant differences associated with the canopy cover, schedule of day, and season, which showed significant differences for all variables. Tree coverage showed significant differences for all variables using the Tukey Test, with the exception of minimum noise. Plots with greater coverage were associated with increases in the particulate matter and relative humidity and decreases in maximum noise, temperature, and ultraviolet radiation. During mornings, the highest measurements of particulate matter, noise, and relative humidity were reported, whereas temperature maximums occurred at mid-day. The results confirm the importance of urban trees, specifically the canopy coverage, in mitigating negative environmental aspects in urban areas. Keywords. Ecosystems Services; Humidity; Noise; Solar Radiation; Temperature; Tree Canopy. Ahmad Hami, Mahsa Tarashkar, and Farzin Emami The Relationship Between Women’s Preferences for Landscape Spatial Configurations and Relevant Socio-Economic Variables ...................................................................................96 Abstract. People’s preferences for urban parks are influenced by the spatial and contextual characteristics of spaces, where landscapes form the main body of parks. The present study examined women’s preferences for landscape spatial quality indicators (including coherence, mys- tery, complexity, legibility, prospect, and refuge) in two urban parks. Also, the study explored the impact of socio-economic variables such as ©2020 International Society of Arboriculture
March 2020
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