2015年对浙江省温州市主城区的绿地生物量进行实测,其数据与Landsat OLI遥感数据建立生物量估算模型,利用2005年和2010年Landsat遥感影像对同时期城市绿地生物量进行了反演,得到绿地生物量的时空分布,分析温州市主城区绿地生物量的变化特征.结果表明,基于遥感数据和随机森林建模可以获得较为理想的城市绿地生物量反演结果;城区内绿地主要以混合像元的形式存在,像元生物量密度普遍较低;随着建成区的不断扩张,城市绿地总生物量明显增加,从2005年的223783.80 t增加至2015年的405191.09 t,生物量平均密度从12.36 t·hm-2上升至15.96 t·hm-2,且2010-2015年的增速更为显著;旧城区生物量也有较明显的增加,但平均生物量密度仍然明显低于建成区整体水平.未来城市发展应加强旧城区人口的疏导和绿地的合理规划,推行全方位多层次绿化,提高绿地生态效益.%Investigations were carried out in 2015 on biomass of green space in the city proper of Wenzhou, Zhejiang province. Based on the Landsat OLI images and field survey data, model for biomass of green space in Wenzhou was established with remote sensing variables. The spatiotemporal dynamics of biomass of green space from 2005 to 2010 in Wenzhou was calculated based on corresponding Landsat images. The results showed that the total biomass of green space at built-up areas of Wenzhou increased evidently with expansion of the city proper, from 223783.80 t in 2005 to 405191.09 t in 2015, and the average biomass density from 12.36 t/ha to 15.96 t/ha, especiallt from 2010 to 2015.
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