Assessing the Potential of Land Use Modification to Mitigate Ambient NO 2 and Its Consequences for Respiratory Health

Meenakshi Rao, Linda A. George, Vivek Shandas and Todd N. Rosenstiel
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Meenakshi Rao: School of the Environment, Portland State University, Portland, OR 97207, USA
Linda A. George: School of the Environment, Portland State University, Portland, OR 97207, USA
Vivek Shandas: Nohad A. Toulan School of Urban Studies and Planning, Portland State University, Portland, OR 97207, USA
Todd N. Rosenstiel: Department of Biology, Portland State University, Portland, OR 97207, USA

IJERPH, 2017, vol. 14, issue 7, 1-19

Abstract: Understanding how local land use and land cover (LULC) shapes intra-urban concentrations of atmospheric pollutants—and thus human health—is a key component in designing healthier cities. Here, NO 2 is modeled based on spatially dense summer and winter NO 2 observations in Portland-Hillsboro-Vancouver (USA), and the spatial variation of NO 2 with LULC investigated using random forest, an ensemble data learning technique. The NO 2 random forest model, together with BenMAP, is further used to develop a better understanding of the relationship among LULC, ambient NO 2 and respiratory health. The impact of land use modifications on ambient NO 2 , and consequently on respiratory health, is also investigated using a sensitivity analysis. We find that NO 2 associated with roadways and tree-canopied areas may be affecting annual incidence rates of asthma exacerbation in 4–12 year olds by +3000 per 100,000 and ?1400 per 100,000, respectively. Our model shows that increasing local tree canopy by 5% may reduce local incidences rates of asthma exacerbation by 6%, indicating that targeted local tree-planting efforts may have a substantial impact on reducing city-wide incidence of respiratory distress. Our findings demonstrate the utility of random forest modeling in evaluating LULC modifications for enhanced respiratory health.

Keywords: nitrogen dioxide; air pollution; land use regression; random forest; health; BenMAP (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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