Journal of Geo-information Science ›› 2020, Vol. 22 ›› Issue (7): 1522-1531.doi: 10.12082/dqxxkx.2020.190297

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Comprehensive Zoning of Land Consolidation Potential in Cities of China and Optimization Pathways

SONG Rong(), HU Yecui*()   

  1. Department of Land Science and Technology, China University of Geosciences, Beijing 100083, China
  • Received:2019-06-11 Revised:2019-11-17 Online:2020-07-25 Published:2020-09-25
  • Contact: HU Yecui E-mail:songrong0218@163.com;huyc@163.com
  • Supported by:
    National Land and Space Planning:Land Improvement and Ecological Protection and Rehabilitation

Abstract:

Land consolidation in urban regions is important for promoting the functional operation of urban land systems and the harmonious coexistence of urban components. To date, studies on urban land consolidation potential and zoning have largely failed to establish a comprehensive index system from the urban perspective. In this paper, based on the demand of urban land consolidation, we used the research framework of "potential assessment-classification-problem identification-optimization pathway." Using hotspot analysis, hierarchical judgment, and other research methods, we evaluated comprehensively the potential of land consolidation in the 289 cities of China, identified zone-specific problems, and proposed improved management strategies. The results show that: (1) The difference of land consolidation potential between different cities is remarkable, the ratio of cities with high consolidation potential and low consolidation potential is low, while the ratio of medium consolidation potential is the highest. There are significant regional differences and agglomeration characteristics regarding the level of urban consolidation potential in China. (2) Based on the decision classification judgment between the three factor layers and between the factor layers and the potential classification, fifteen urban land consolidation types were defined, including S-NULL comprehensive development high-potential consolidation area, M-N naturally restricted medium-potential consolidation area, L-NE benign development low-potential consolidation area, and L-NEC temporarily unsuitable low-potential consolidation area, etc. (3) According to the constraints of various zone types, the problem identification by region was mainly divided into eight types, including the comprehensive development type, intensive development type, economic investment type, natural constraint type, natural applicable type, rational use type, benign development type, and temporary inappropriate type. Based on the identification of zone-specifric problems in urban land remediation, the goal of urban land remediation was clarified, and the improvement pathways of regional goal orientation were proposed according to local conditions. The research methods and the findings can be used as a theoretical reference for urban land consolidation of China.

Key words: urban, land consolidation, zoning, optimization path, comprehensive evaluation, China, potentiality, spatial pattern