气候变化领域集成服务门户(CCPortal): Global mapping of urban-rural catchment areas reveals unequal access to services

CCPortal

DOI	10.1073/PNAS.2011990118
	Global mapping of urban-rural catchment areas reveals unequal access to services
	Cattaneo A.; Nelson A.; McMenomy T.
发表日期	2021
ISSN	00278424
卷号	118 期号:2
英文摘要	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. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	City-region systems; Economic geography; Functional urban areas; Rural-urban continuum; Territorial development
语种	英语
scopus关键词	article; catchment area; city; employment; geography; human; investment; low income country; middle income group; rural area; theoretical study; travel; urban area; urbanization
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/181163
作者单位	Agri-Food Economics Division, Food and Agriculture Organization of the United Nations, Rome, 00153, Italy; Faculty of Geo-Information Science and Earth Observation, University of Twente, Enschede, 7514 AE, Netherlands
推荐引用方式 GB/T 7714	Cattaneo A.,Nelson A.,McMenomy T.. Global mapping of urban-rural catchment areas reveals unequal access to services[J],2021,118(2).
APA	Cattaneo A.,Nelson A.,&McMenomy T..(2021).Global mapping of urban-rural catchment areas reveals unequal access to services.Proceedings of the National Academy of Sciences of the United States of America,118(2).
MLA	Cattaneo A.,et al."Global mapping of urban-rural catchment areas reveals unequal access to services".Proceedings of the National Academy of Sciences of the United States of America 118.2(2021).