Mapping the spatial distribution of shade provision of street trees in Boston using Google Street View panoramas |
| |
| Institution: | 1. Center for Sustainability, Saint Louis University, Saint Louis, MO, USA;2. University of Missouri, School of Natural Resources, 103 Anheuser-Busch Natural Resources Building, and Department of Bioengineering, 254 Agricultural Engineering, Columbia, MO, 65211, USA;1. Computational Vision Laboratory, California Institute of Technology, USA;2. Photogrammetry and Remote Sensing, ETH Zürich, Switzerland;1. Senseable City Laboratory, Department of Urban Studies and Planning, Massachusetts Institute of Technology, Room 10-485, 77 Massachusetts Avenue, Cambridge, MA, 02139, United States;2. Canada Research Chair in Ecological Integrity, Centre de Recherche sur les Interactions Bassins Versants-Ecosystemes Aquatiques, Universite du Quebec a Trois-Rivieres, 3351 Boulevard des Forges, Trois-Rivieres, Quebec, G9A 5H7, Canada;3. MIT Media Lab, 75 Amherst St, Cambridge, MA 02139, United States;1. School of Architecture, The Chinese University of Hong Kong, Shatin NT, Hong Kong;2. Department of Architecture, Massachusetts Institute of Technology, Cambridge, MA, USA;3. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA;4. Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Shatin NT, Hong Kong;5. Senseable City Laboratory, Massachusetts Institute of Technology, Cambridge, MA, USA;6. Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Shatin NT, Hong Kong;7. Institute of Future Cities, The Chinese University of Hong Kong, Shatin NT, Hong Kong |
| |
| Abstract: | Street trees provide shade and increase human thermal comfort during hot summer. In this study, we investigated the spatial distribution of shade provision of street trees in Boston, Massachusetts. The sky view factor (SVF), which influences the solar radiation to the ground and affects human thermal comfort, was used to indicate the contribution of street trees on shade provision. Google Street View (GSV) panoramas were used to calculate the photographic method based SVF (SVFP), with the consideration of all kinds of obstructions within street canyons. A building height model was used to calculate the simulation based SVF (SVFs), with consideration of obstruction of building blocks only. Considering the fact that street trees and building blocks are the two major obstructions of radiation within street canyons, therefore, the difference between the two SVF estimation results can be considered as the shade provision of street trees. The results show that street trees help to decrease the SVF by 24.61% in Boston, Massachusetts. The shading level varies spatially in the study area. Generally, the southwestern area has much higher shading level than the north and the east. We further explored the shading variation among different socioeconomic groups in the study area. Result shows that Hispanics tend to live in neighborhoods with lower shading level. This study can help to provide a reference for future urban greening projects for global climate change adaption. |
| |
| Keywords: | Google Street View (GSV) Sky view factor Shade provision Street trees |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
