Abstract
Urban growth and development can be interpreted as a combined process of “urban spillover” and “local urban sprawl”, from overall urban–rural development to urban–rural integration (URI). The process of suburban development in western China is a complex system, which reflects the characteristics of industrialization and urbanization in western China. Chengdu is the most representative of the big cities for economic and social structure change in western China. To analyze the changes on URI degree based on the built-up land change, and to explore the practical URI paths in both the suburbs and exurbs of Chengdu, we use land-use remote-sensing monitoring data from 2000, 2005, 2010, and 2015 in this paper, whereafter URI indexes are built from space, economy, and society. The land-use change of the suburbs and exurbs of Chengdu from 2000 to 2015 are analyzed by ArcGIS. Results indicate that the biggest growth part of built-up land is other built-up land, followed by commercial/industrial land, and the last is residential land. The built-up land spreads quickly from 2000 to 2005, and shows distinct separation characteristics in the suburbs of Chengdu. It is relatively slow in the exurbs. Moreover, built-up land connects better in the suburbs than in the exurbs. Based on the change of built-up land in Chengdu from 2000 to 2015, spatial integration data are calculated, economic integration and social integration data are chosen from statistics, and the change of URI levels in the suburbs and exurbs of Chengdu is calculated. The results show that first, economic integration and social integration have great influence on URI, and their effects are increasing. The significance of spatial integration in URI has gradually reduced. Second, URI levels in counties of the suburbs and exurbs of Chengdu rose from 2000 to 2015, more highly in the suburbs than in the exurbs. URI in counties of the exurbs showed a marked difference. URI in the southeast counties of the exurbs is generally high. The foundation of URI is weaker in the counties and districts in the southwest counties of the exurbs in Chengdu, but it is growing steadily in URI, and the northern counties in the exurbs of Chengdu are in the process of rapid URI. The paths of URI in the suburbs and exurbs in Chengdu can be roughly divided into an industry-developing model in the suburbs, service-industry-developing model in the suburbs, agriculture-developing model in the exurbs, service-industry-developing model in the exurbs and infrastructure-developing model in the exurbs.
Highlights
With continuous progress of globalization and urbanization, both developed and developing countries have explored countermeasures that suit their national conditions, to promote sustainable development [1]
This paper chooses Chengdu as the research area, and tries to answer the following questions: First, what is the difference in land-use changes in the suburbs and exurbs of Chengdu? Second, what are the changes on urban–rural integration (URI) degree based on the land-use change? Third, what are the practical URI paths in the suburbs and exurbs of Chengdu?
The values of conta degree (CONTAG) are larger generally in the exurbs; among the counties, they are larger in Pujiang, Dujiangyan, and Pengzhou, which shows that the separation of commercial/industrial land, residential land, and other built-up land is not obvious, and that the development of built-up land is relatively slow in the exurbs of Chengdu
Summary
With continuous progress of globalization and urbanization, both developed and developing countries have explored countermeasures that suit their national conditions, to promote sustainable development [1]. The urban–rural interaction pattern: Land 2021, 10, 474 for counties in economically developed areas and suburbs of big cities, non-agricultural employment is higher, with urban radiation, which has good conditions for the exchange of urban and rural elements. City-promotescountryside pattern: for counties in economically underdeveloped areas and exurbs of big cities, non-agricultural employment is lower, and the internal impetus for achieving sustained development is feeble, so the exchange of urban and rural elements is inaccessible. China’s current national conditions show a high proportion of the rural population, a poor economic foundation, and a large gap between urban and rural areas To reduce this gap, China has implemented macro strategies, such as overall urban–rural development, new rural construction, unifying the design between the city and the countryside, and new-type urbanization. This paper chooses Chengdu as the research area, and tries to answer the following questions: First, what is the difference in land-use changes in the suburbs and exurbs of Chengdu? Second, what are the changes on URI degree based on the land-use change? Third, what are the practical URI paths in the suburbs and exurbs of Chengdu?
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