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Global mapping of urban-rural catchment areas reveals unequal access to services [Environmental Sciences]
Proceedings of the National Academy of Sciences of the United States of America ( IF 9.4 ) Pub Date : 2021-01-12 , DOI: 10.1073/pnas.2011990118
Andrea Cattaneo 1 , Andrew Nelson 2 , Theresa McMenomy 1
Affiliation  

Using travel time to cities of different sizes, we map populations across an urban–rural continuum to improve on the standard dichotomous representations of urban–rural interactions. We extend existing approaches by 1) building on central place theory to capture the urban hierarchy in access to services and employment opportunities provided by urban centers of different sizes, 2) defining urban–rural catchment areas (URCAs) expressing the interconnection between urban centers and their surrounding rural areas, and 3) adopting a global gridded approach comparable across countries. We find that one-fourth of the global population lives in periurban areas of intermediate and smaller cities and towns, which challenges the centrality of large cities in development. In low-income countries, 64% of the population lives either in small cities and towns or within their catchment areas, which has major implications for access to services and employment opportunities. Intermediate and small cities appear to provide catchment areas for proportionately more people gravitating around them than larger cities. This could indicate that, for countries transitioning to middle income, policies and investments strengthening economic linkages between urban centers and their surrounding rural areas may be as important as investing in urbanization or the rural hinterlands. The dataset provided can support national economic planning and territorial development strategies by enabling policy makers to focus more in depth on urban–rural interactions.



中文翻译:

城乡集水区的全球地图揭示了获得服务的不平等[环境科学]

利用到不同规模城市的旅行时间,我们绘制了整个城乡统筹的人口图,以改善城乡互动的标准二分法表示。我们通过以下方式扩展现有方法:1)建立在中心位置理论的基础上,以掌握不同规模的城市中心在提供服务和就业机会方面的城市等级; 2)定义表示城市中心之间相互联系的城乡集水区(URCA);以及他们周围的农村地区,以及3)采用可与各国相比的全球网格化方法。我们发现,全球人口的四分之一居住在中小城镇的郊区地区,这挑战了大城市在发展中的中心地位。在低收入国家,64%的人口居住在小城镇或集水区内,这对获得服务和就业机会产生重大影响。与大城市相比,中小城市似乎为更多的人提供了集水区。这可能表明,对于向中等收入国家过渡的政策和投资,加强城市中心及其周边农村地区之间的经济联系可能与投资于城市化或农村腹地一样重要。所提供的数据集可以使决策者更加深入地关注城乡互动,从而可以支持国家经济规划和领土发展战略。这对获得服务和就业机会有重大影响。与大城市相比,中小城市似乎为更多的人提供了集水区。这可能表明,对于向中等收入国家过渡的政策和投资,加强城市中心及其周边农村地区之间的经济联系可能与投资于城市化或农村腹地一样重要。所提供的数据集可以使决策者更加深入地关注城乡互动,从而可以支持国家经济规划和领土发展战略。这对获得服务和就业机会有重大影响。与大城市相比,中小城市似乎为更多的人提供了集水区。这可能表明,对于向中等收入国家过渡的政策和投资,加强城市中心及其周边农村地区之间的经济联系可能与投资于城市化或农村腹地一样重要。所提供的数据集可以使决策者更加深入地关注城乡互动,从而可以支持国家经济规划和领土发展战略。对于向中等收入国家过渡的政策和投资,加强城市中心及其周边农村地区之间的经济联系可能与投资于城市化或农村腹地一样重要。所提供的数据集可以使决策者更加深入地关注城乡互动,从而可以支持国家经济规划和领土发展战略。对于向中等收入国家过渡的政策和投资,加强城市中心及其周边农村地区之间的经济联系可能与投资于城市化或农村腹地一样重要。所提供的数据集可以使决策者更加深入地关注城乡互动,从而可以支持国家经济规划和领土发展战略。

更新日期:2021-01-12
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