基于CITYgreen模型的绿道生态效益评价——以增城市为例

Ecological benefits assessment of greenway based on CITYgreen model——A case study of Zengcheng city

为科学合理规划与管理城市绿道,采用GIS技术,根据增城市2010年landsat TM数据,运用CITYgreen模型对增城市2010年绿道生态效益进行评估。结果显示,绿道每年固碳量为23 253.42 t,产生的经济效益为584.59万元;每年净化空气50 116.73t,经济效益74.07万元。因此绿道每年固碳及净化空气两项的生态效益就为658.66万元,其中增江东、西岸绿道的生态效益分别为278.64万、377.31万元。结合景观格局分析说明,景观的构成对绿道生态服务效率有关键作用,且耕地对固碳及净化空气的作用不大。可见作为生态系统的重要组成部分,绿道对城市的生态效益贡献是显著的。

For scientific and reasonable planning and management of urban greenway, based on GIS technology, this research used 2010 land sat TM data of Zengcheng city and CITYgreen model to evaluate ecological benefits of greenway. Results show that the annual carbon storage reaches 23 253.42 t ,air pollution removal reaches 50 116.73 t, corresponding economic benefits are 5.8459 million yuan in carbon storage, 0.7407 million yuan in air pollution removal; So the total ecological benefits brought by greenway is 6.5866 million yuan. Among these, ecological benefits of greenway in east zeng^iang river and west zengiiang river are 2.7864 million yuan and 3.7731 million yuan. Combined with the landscape pattern analysis, it shows that landscape structure directly affects the efficiency of greenway ecosystem services, and euhivated land act little on earbon fixation and air purification. The benefit of greenway is remark for a city.