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西北区域城镇化与资源环境承载力协调发展的时空特征——以兰西城市群为例

张韦萍,石培基*,赵武生,冯涛,付春雨   

  1. (西北师范大学地理与环境科学学院, 兰州 730070)
  • 出版日期:2020-07-10 发布日期:2021-01-09

The spatial-temporal characteristics of coordinated development between urbanization and resources and environmental carrying capacity in Northwest China: A case study of Lanzhou-Xining urban agglomeration.

ZHANG Wei-ping, SHI Pei-ji*, ZHAO Wu-sheng, FENG Tao, FU Chun-yu   

  1. (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China).
  • Online:2020-07-10 Published:2021-01-09

摘要: 城镇化与资源环境协调问题是推动区域社会经济发展的关键问题之一。本文着力构建城镇化与资源环境承载力评价指标体系,运用熵值法和协调度模型测度2005—2017年兰西城市群地区城镇化与资源环境承载力协调度的时空格局特征。结果表明:兰西城市群城镇化综合指数时间上呈持续上升趋势,其中社会城镇化贡献份额逐渐增大,空间上出现“极化”发展模式,兰州和西宁两大核心城市与周围县区差距显著;资源环境承载力综合指数呈波动上升态势,资源环境绩效水平有待提高,其空间上表现出东高西低的分布状态,基本与地形分布相符;从协调类型上看,城镇化与资源环境承载力协调度在0.4~0.5,处于濒临失调状态,且协调度空间集聚特征较明显,协调区域集中于兰州、西宁两大省会城市及周围部分县区,失调区域则集中于城市群南部和西部县区。研究结果可为兰西城市群地区城镇化与资源环境承载力协调有序发展提供参考。

关键词: 保氮剂, 高温堆肥, 氮素损失, 水葫芦, 氨挥发

Abstract: The coordination between urbanization and environment is one of key issues for regional socio-economic development. We constructed an evaluation index system of urbanization and resources and environmental carrying capacity, and measured the spatiotemporal characteristics of urbanization, resources and environmental carrying capacity and coordination degree of Lanzhou-Xining urban agglomeration from 2005 to 2017 using the entropy method and coordination degree model. The results showed that the comprehensive index of urbanization shows a continuous upward trend, with the contribution of social urbanization being gradually increased and a “polarization” development model in space. There were significant differences in social urbanization between the two core cities (Lanzhou and Xining) and the surrounding counties. The comprehensive index of resources and environmental carrying capacity showed a fluctuating upward trend, of which the level of resources and environmental performance needs to be improved. Spatially, it was high in the east region and low in the west region, consistent with the topographic distribution. From the perspective of coordination types, the degree of coordination between urbanization and resources and environmental carrying capacity was between 0.4 and 0.5, which is on the verge of imbalance, with obvious spatial agglomeration characteristics. The coordinated areas were concentrated in the two provincial capitals (Lanzhou and Xining) and some surrounding counties, while the less coordinated areas were concentrated in the southern and western counties. Our results provide reference for the coordinated development of urbanization and resources and environmental carrying capacity in the Lanzhou-Xining urban agglomeration.

Key words: Eichhornia crassipes, nitrogen preserving agent, high temperature composting, ammonia volatilization, nitrogen loss.