TROPICAL GEOGRAPHY ›› 2019, Vol. 39 ›› Issue (3): 410-419.doi: 10.13284/j.cnki.rddl.003130

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Coupling Coordination Degree Analysis between Multifunctionality and Security of Cultivated Land at Town Scale in Zhuhai

Li Jiayi1 and Dong Yuxiang1,2   

  1. (1. School of Geography and Planning// Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, Sun Yat-Sen University, Guangzhou 510275, China; 2. Xinhua College of Sun Yat-Sen University, Guangzhou 510520, China)
  • Received:2018-11-29 Revised:2019-03-06 Online:2019-05-05 Published:2019-05-05

Abstract:

Cultivated land can be regarded as a coupled system defined by human-nature interaction. The multifunctionality and security of it are therefore critical to the sustainable development of both the cultivated land and the human society. Furthermore, studying the coupled and coordinated development between the multifunctionality and security of the cultivated land is also the key to enhance its utilization and protection. For the town of Zhuhai, in particular, it is important to carry out such a study in a period of rapid urbanization. Therefore, taking Zhuhai as the study area, and utilizing land use data and socio-economic statistical data covering the period 1990-2015, this work investigates the temporal and spatial variation of the coupling coordination degree between multifunctionality and security of cultivated land by means of the comprehensive index evaluation method and the coupling coordination degree model. Besides, by using a new statistical method, the Geodetector, this article work also reveals the main factors controlling the development of the coupling coordination degree. Conclusions are drawn as follows: 1) the temporal variation of the coupling coordination degree between multifunctionality and security of cultivated land at town scale in Zhuhai is relatively steady in the period 1990-2000 but drastic in the period 2000-2015; in general, it decreases from 0.65 to 0.59 from 1990 to 2015; 2) the spatial variation of the coupling coordination degree exhibits an increasing trend in the western area, and a decreasing trend in the eastern area from 1990 to 2015; on the whole, its spatial distribution pattern shows that the western area is higher than the central and eastern areas; 3) according to the Geodetector, different factors have a different impact on the development of the coupling coordination degree: land reclamation rate, planting industry's proportion in GDP, output of crops, amount of chemical fertilizers and pesticides are the main factors affecting the development of coupling coordination degree, since they affect the cultivated land resource endowment, the utilization efficiency, the planting structure, and the input of chemical substances.

Key words: cultivated land multifunctionality, cultivated land security, coupling coordination degree, Geodetector, Zhuhai