中国城市绿地现状及其生态经济价值评价

Present State of Chinese City Green Areas and Estimation of Its Value in Ecology and Economy

我国目前城市绿地平均覆盖率约为 2 5 % ,人均绿地 6 .10m2 ,尚处于较差水平 ,而且城市绿地比重分布极不均衡 ,总体特征是东部多 ,西部少 ,沿海多 ,内地少 .尤其是西北地区的部分城市绿化覆盖率不足 5 % ,城市环境容量非常有限 .城市绿地在城市系统中发挥着固碳释氧 ,固水保土 ,调温调湿 ,滞尘吸污 ,防风阻沙 ,杀菌减噪等强大的生态功能 ,同时产生巨大的生态经济效益 .文章以广州市城市绿地为例 ,初步估算其生态经济价值高达 1.16亿元 ,并且尚有许多潜在生态价值难以量化 .因此加大城市绿地建设力度势在必行 .

The coverage ratio of Chinese city green areas is about 25% and each person has city green areas about 6.10m 2.It is in a low level and the proportion of green areas is not balanced,The total feature is:that in the east cities are more that in than the west cities,seaside cities are more than inland cities.Especially in the north-west of China,many cities have proportion of green areas less than 5%.City green areas have strong ecological functions:fixing C and releasing O2,keeping water and soil,adjusting temperature and miosture ,stopping dust and absorbing wastes ,resisting wind and sand ,killing gern and reducing niose et.al.At the same time the city green areas produce huge economic value.This article estimated the ecological and economical value of Guangzhou,it is about 116 millions Yuan,and much latent ecological value can notbe estimated.So it is necessary to build more city green areas.