地理研究 ›› 2011, Vol. 30 ›› Issue (5): 893-901.doi: 10.11821/yj2011050013

• 环境与生态 • 上一篇    下一篇

广州城市公园绿地投入与环境效益产出的分析——基于数据包络(DEA)方法的评价

陈忠暖, 刘燕婷, 王滔滔, 吕逸宏   

  1. 华南师范大学地理科学学院,广州 510631
  • 收稿日期:2010-09-19 修回日期:2011-12-14 出版日期:2011-05-20 发布日期:2011-05-20
  • 作者简介:陈忠暖(1957-),男,重庆人,教授,主要从事城市地理、区域经济等方面的研究。 E-mail:chenzhn@scnu.edu.cn
  • 基金资助:

    广东省自然科学基金项目(10151063101000018)、广东省软科学研究项目(2010B070300072)

Analysis of inputs and environment benefit outputs of urban park green land in Guangzhou based on DEA

CHEN Zhong-nuan, LIU Yan-ting, WANG Tao-tao, LV Yi-hong   

  1. School of Geography, South China Normal University, Guangzhou 510631, China
  • Received:2010-09-19 Revised:2011-12-14 Online:2011-05-20 Published:2011-05-20

摘要: 遵循国外对绿地价值的评价方向,借鉴国内外研究中的数据包络分析方法,对尚少涉足的城市绿地效率评价进行研究。构建城市公园绿地投入与环境效益产出的指标体系,评价2001~2008年广州城市公园绿地的生态效率。其中,公园绿地的环境效益产出主要用了绿地的固碳释氧、净化空气、调节气候和城市滞尘四大功能的生态价值估测方法,以此量化城市公园绿地环境效益的产出。结果显示:(1)广州城市公园绿地的环境效益产出主要受土地和劳动影响,资本起辅助作用;(2)由于资本的投入冗余较高,广州城市公园绿地的生态效率现状偏低;(3)广州城市公园绿地生态效率经历了由2001~2004年的平稳优效期向2005~2008年的波动非优期的过渡;(4)规模效率对环境效益产出的贡献大于纯技术效率,园林绿化固定资产投资是影响纯技术效率的主要原因,公园绿地面积和职工人数是影响规模效率的主要原因。

关键词: 城市公园绿地, 环境效益, 生态效率, 数据包络分析, 广州市区

Abstract: Following the evaluation to green land abroad and drawing lessons from domestic study on data envelopment analysis (DEA), we did some evaluations to urban park green land which have not been studied much yet. Park green land is one part of urban green land system. Based on functions of fixing carbon and releasing oxygen, purifying environment, conditioning climate and detaining dust, we calculated the environmental benefit of park green land of ten districts in Guangzhou from 2001 to 2008. Then the input-output index system was built to evaluate the eco-efficiency of park green land in 2001—2008 by DEA. The land, labor and capital were taken as the input while the environment benefit was the output of park green land. The results showed that: firstly, influenced by the input of land and labor, generally, the environmental benefit of urban park green land presented an increasing trend but sustainable increasing ability was relatively weak; secondly, the input redundancy rate and insufficient rate of output in 2008 showed that the more input of fixed assets and financing of park maintenance caused low eco-efficiency in 2008; thirdly, the comprehensive efficiency, the technique efficiency and the scale efficiency were 1 in 2001, 2003 and 2004, which indicated the optimum efficiency. In 2002 and 2007, the comprehensive efficiency, the technique efficiency and the scale efficiency were between 0.895-1 which indicated the suboptimum efficiency. It showed non-efficiency in 2005, 2006 and 2008 in spite of over 0.8 in technique efficiency and scale efficiency because the comprehensive efficiency was below 0.8. Then it could be marked into two phases: stationary highly efficient phase in 2001—2004 and fluctuation non-efficient phase in 2005-2008, which meant the efficiency of urban park green land was low and unstable; fourthly, scale efficiency had a greater impact on environment benefit than technique efficiency influenced by fixed assets mainly, while scale efficiency was influenced by labor and land. Finally, we proposed some suggestions on enhancing the eco-efficiency of urban park green land in Guangzhou according to the findings. The government should increase input in urban park green land and labors to satisfy the need of environmental benefit outputs, and then control the proportion of input and output stably, especially the inputs. What's more, the supervision mechanisms of budget and the running of funds should be perfected.

Key words: urban park green land, environmental benefit, eco-efficiency, data envelopment analysis, Guangzhou