Spatiotemporal Variability of Personal Exposure to Traffic Emission while Human Dynamics is Considered

Authors: GUIXING WEI*, Texas State University, Benjamin F. Zhan, Texas State University
Topics: Medical and Health Geography, Human-Environment Geography, Geographic Information Science and Systems
Keywords: health, exposure assessment, GIS, traffic emission
Session Type: Paper
Day: 4/12/2018
Start / End Time: 8:00 AM / 9:40 AM
Room: Studio 6, Marriott, 2nd Floor
Presentation File: No File Uploaded

Environmental exposure assessment is an important step in epidemiological studies examining associations between personal exposure to environmental stressors and adverse health outcomes. Conventionally, home location is most commonly used to estimate human exposure to environmental stressors without taking into account trajectories of human activities in geographic space and time. Traffic emission is a geographically localized phenomenon that occurs within certain distances of major roads. Because of the innate characteristics of spatial heterogeneity associated with traffic emission, a home-based exposure assessment would often introduce uncertainties the resulting exposure. In this study, we integrated temporal adjustment factors into a validated spatial model to quantify the intensity of traffic emission in geographic space and time. A set of simulated personal trajectories is overlaid to the traffic emission model to estimate personal exposure. Following one of our previous studies, a set of exposure indicators was utilized to investigate personal exposure in different microenvironments. This presentation reports some preliminary results about the spatiotemporal variability of the assessment.

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