Influence of land intensive use level on main atmospheric pollutants in the central urban area of Nanchang City, China.

doi:10.13287/j.1001-9332.201805.031

Abstract

Abstract: At present, urbanization has gradually changed from denotative expansion to connotative development in China. It is urgently needed for intensive use of land resources and the construction of “compact city”. However, intensive land use means less land resources to carry more urban elements, therefore people will become more and more sensitive to environmental pollution, especially atmospheric pollution. It is of great significance to study the influence of intensive land use on atmospheric pollution. Taking the central urban area of Nanchang City as a case, this study simulated the concentration of the six main atmospheric pollutants i.e. PM_2.5, PM₁₀, SO₂, NO₂, CO and O₃ by ordinary kriging interpolation firstly. Then, sixteen intensive land use variables, including the volume ratio, building density, population density, were analyzed with the partial least squares regression and path analysis in order to reveal the effects of intensive land use level on the atmospheric pollutants. The results showed that the correlations between intensive land use level and PM_2.5, PM₁₀ were the strongest, followed by O₃ and NO₂, and the weakest correlation was between intensive land use level and SO₂, CO. The sequence of the correlation between intensive land use variables and the six main atmospheric pollutants in different sample areas was residential area> education area > business area > industrial area. The more intensive the land use was, it had greater impacts on the atmospheric pollutants. The greatest effect was on PM_2.5 and PM₁₀, followed by O₃, and the least effect was on NO₂. The direct, indirect, and integrated influences of intensive land use on atmospheric pollutants were generally equal. Overall, the direct influence of the intensive land use level was greater than the indirect one, among which the influence of the intensive land use level of the residential area was the strongest, followed by the business area, and the education area least. This study provided a new perspective on studying the influence of intensive land use on atmospheric environment, which would provide some reference to solve the atmospheric problems in compacted city.

LIANG Zhao-feng, CHEN Wen-bo, ZHENG Jiao. Influence of land intensive use level on main atmospheric pollutants in the central urban area of Nanchang City, China.[J]. Chinese Journal of Applied Ecology, 2018, 29(5): 1705-1714.

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