南京中心城区绿地可达性分析

Accessibility Assessment of Green Space in the Central City of Nanjing

以遥感数据为基础,采用GIS空间分析的费用距离加权方法,对南京中心城区绿地可达性进行了分析。结果表明:南京中心城区绿地整体可达性较高,逾九成居民步行约3min即可到达一块绿地,其余亦不超过10min。其中,附属绿地可达性最好,超过90%的市民采用任何交通方式10min内均可到访附属绿地;公共绿地可达性次之,70%的居民步行10min可到达公共绿地,采用非机动车或机动车则10min到达公共绿地的居民可达90%以上的比例;生态防护绿地服务面积较大,但分布偏远,居民可享用性相对较差,生产性绿地景观整体可达性最差。建议采取增加附属绿地规模、完善公共绿地功能、严格保护控制生态防护绿地和生产绿地适度规模等举措,有层次、有步骤的提高绿地服务便捷程度。

According to remote sensing data,green space accessibility of Nanjing urban area were analyzed using the cost weighted distance method of GIS spatial analysis. The results showed that the overall green space accessibility was good. More than 90% of the urban population could walk to green space in 3 minutes, and the rest need no more than 10 minutes. Attached green space had the best accessibility among green space types. No matter taking of any kinds of transportation,90%of citizens could reach the affiliated green space in 10 minutes. 70%of citizens could walk to public green space in 10 minutes. However, the population proportion was 90% with the bicycle or motor vehicle. Ecological buffer green space had the larger service area, but poor service ability for residents. Productive plantation area accessibility was the worst among green space types. In order to improve the service ability,the suggestion which includes increasing affiliated green space area, improving the public green space function, protecting ecological buffer green space and productive plantation area strictly would be put into execution systematically.