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

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袁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 zengjiang river and west zengjiang 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 cultivated land act little on carbon fixation and air purification. The benefit of greenway is remark for a city.