RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2017, Vol. 26 >> Issue (03): 376-383.doi: 10.11870/cjlyzyyhj201703007

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URBAN LAND SPATIAL OPTIMIZED ALLOCATION BASED ON THE IDEA OF NICHE FITNESS

LI Xin1, XIAO Chang-jiang2,3, OU Ming-hao3, LOU Shu-yu1   

  1. 1. School of Geography, Geomatics & Planning, Jiangsu Normal University, Xuzhou 221116, China;
    2. School of Tourism and Urban Management, Jiangxi University of Finance and Economic, Nanchang 330013, China;
    3. College of Land Management, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2016-07-12 Revised:2016-10-12 Online:2017-03-20
  • Supported by:
    Project Supported by Natural Science Foundation of China;Foundation Research Project of Jiangsu Province

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Abstract: Urban land spatial optimization is the hot topic in the fields of geography and urban planning, which affects not only urban morphology, but also overall land use efficiency. Therefore, to optimize urban spatial structure and improve efficiency spatially, this research conducted urban land spatial optimization. Both the effects of internal factors of spatial units on urban land suitability and the influence of their neighbor units were taken into account. The status of neighbor units is expected to affect the possibility of being changed into urban land as the core unit, which is in accordance with the idea of niche fitness. Niche fitness was decided by the state and the potential of the niche, while the possibility of being converted into urban land was decided by the core unit itself and its neighbor jointly. Therefore, in this manuscript, a method of urban land spatial optimization based on niche theory was proposed. The method was realized by programming in Matlab and was applied for Yangzhou downtown as a case study. The results are as follows:urban land spatial optimization needs to consider the suitability of units and the demand of spatial continuity; unit fitness was the basic for urban land spatial optimization, thus deemed as state value in niche theory; spatial continuity was achieved by the propagation mechanism of unit effect, therefore the effect of neighbor unit is regarded as potential value in niche theory. The proposed method taking into account the interior factors of units and affects of neighbors during spatial allocation process is proved scientific and can achieve reasonable urban land layout, and could be used as an effective tool for urban growth boundary demarcation in spatial planning.

Key words: urban land, spatial optimized allocation, niche fitness, Yangzhou

CLC Number: 

  • F323.2
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