上海浦西建成区城市森林树冠覆盖特点及格局

应用ArcGIS判读2012年上海的遥感影像,分析上海浦西外环线内建成区(360 km2)树冠覆盖特征;判读样方218个、面积3 420 hm2,占研究区的9.5%。结果表明,现有树冠覆盖总面积为8 241.82 hm2、树冠覆盖率22.89%。浦西建成区内55所公园的平均覆盖率为53.72%;不同功能区的树冠覆盖率有显著差异,其中公园最高(53.72%),其次是外环林带(50.72%)、一般绿地(34.60%)、校园(24.13%),住宅最低(21.87%)。按树冠覆盖估算,研究区共有乔木810万余株,潜在的树冠覆盖率可达24.56%~25.67%,至少可增植乔木60万株。  

Tree Canopy Coverage of Built-up Area in Puxi, Shanghai: Characteristics and Pattern

The remote sensing image of Shanghai taken in 2012 was interpreted using ArcGIS, which was used to an- alyze the characteristics of tree canopy coverage （TCC） at the built - up area （360 km2 ） around Puxi, Shanghai. The plots interpreted numbered 218, with the area of 3 420 ha, accounting for 9. 5% of the study area. The results showed that the total TCC area was 8 241.82 hm2, and the tree canopy cover was 22. 89%. The average tree canopy coverage in 55 parks was 53.72%, and they were difference significantly in different land use categories, among which the tree canopy cover was highest in parks at 53.72% , followed by those in ring forest （50.72%）, general green space （34. 60% ）, school yard （24. 13% ） and resident area （21.87%） . It was estimated based on the TCC that there are 8. lmillion trees in the study area, the potential tree canopy cover could reach 24. 56% -25.67%, and at least 0. 6 million more trees can be planted.