Development of Land Use Regression Models for Assessing Exposure to NO<sub>2</sub>, NO<sub>x</sub> and SPM, and Their Applicability to Air Pollution Epidemiologic Studies in Japan

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  • Fukuo Aya
    Graduate School of Environmental and Information Sciences, Yokohama National University
  • Hanaoka Koki
    Graduate School of Environmental and Information Sciences, Yokohama National University
  • Arai Tomohiro
    College of Engineering Science, Yokohama National University
  • Nakai Satoshi
    Graduate School of Environmental and Information Sciences, Yokohama National University

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Other Title
  • 窒素酸化物，二酸化窒素，浮遊粒子状物質曝露評価のためのLand Use Regression (LUR) モデル構築および大気汚染疫学調査への適用可能性
  • チッソ サンカブツ,ニサンカ チッソ,フユウ リュウシジョウ ブッシツ バクロ ヒョウカ ノ タメ ノ Land Use Regression (LUR)モデル コウチク オヨビ タイキ オセンエキガク チョウサ エ ノ テキヨウ カノウセイ

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Abstract

<p>The Land Use Regression (LUR) model is now used for exposure assessment in air pollution epidemiologic studies rather than measuring/monitoring pollutants. However, there have been few epidemiologic studies using the LUR models and characteristics of the model have been unclear in Japan. To determine whether the LUR model can be applicable to air pollution epidemiologic studies as the method of exposure assessment in Japan, we developed the LUR models for NO2, NOx, and SPM in Yokohama.</p><p>The annual means of NOx, NO2 or SPM measured at 29 monitoring stations in Yokohama city in 2005 were regressed on land use data such as residential/industrial area, traffic volume, etc, using a manual stepwise method. The adjusted R2 values for the NOx and NO2 regressions were 0.88 and 0.81, respectively. The adjusted R2 for the SPM regression was 0.55. The distributions of the concentrations were mapped using Arc-GIS software. The LUR models we developed and the concentration maps may be valid compared to other models and the LUR models developed in the western countries. However, a much higher resolution for the concentration distribution based on the LUR models might be necessary for epidemiological studies of traffic-related air pollution in Japan. We should be necessary to consider the measurement points, etc, necessary for developing the LUR models.</p>

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