Population-land spatial coupling in urban non-core region and environmental pollution: evidence from urbanization in China

Jian Chen,Di Zhao,Taimoor Hassan, Sunny Adiyoh Imanche

JOURNAL OF ENVIRONMENTAL PLANNING AND MANAGEMENT(2024)

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摘要
Urban non-core region land exploitation and population immigration toward urban non-core areas, two fundamentals of urbanization in China, challenge the environment; however, the pollution effect remains unclear. Using prefecture-level data in China between 2003 and 2020, our study investigates the pollution effect of population-land spatial coupling in the urban non-core region. The empirical results demonstrate that excessive urban non-core region land expansion alone negatively impacts the environment. Meanwhile, outward spatial population distribution in a town, primarily measured by the relative proportion of the urban non-core region population size, directly aggravates environmental pollution on the one hand and indirectly improves the environment by alleviating the adverse effect of land-led urbanization. These findings remain robust under various regional heterogeneity analyses and still stand regardless of the investigated pollutants. The practical implications suggest that breaking through the population-land spatial coupling when the urban core region is small is advisable; meanwhile, efforts in maintaining the coupling, especially for areas with sizeable peripheral land exploitation, should be held.
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关键词
urbanization,population-land spatial coupling,urban non-core region,pollution effect,Q56,R12,J61
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