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应用ArcGIS判读2007年遥感影像,分析了上海浦东新区(原)的树冠覆盖。研究区总面积为533 km2,建成区为252 km2。结果表明,研究区现有树冠覆盖率7.02%,建成区树冠覆盖率10.27%;其中研究区的潜在树冠覆盖(技术层面)可达8.68%~9.79%,建成区潜在树冠覆盖率可达到11.49%~12.3%。自商业中心向东树冠覆盖表现城郊梯度的变化,在建成区内自中心城区到城郊边树冠覆盖呈递增趋势,并在外环林带区域达到最高值,之后在城市外侧明显递减。不同功能区的树冠覆盖同样呈现明显差别,外环林带最高,随后是公园、道路、居住区,商业区则最低。根据树冠覆盖估算,浦东新区约有乔木368万株,其中建成区有255万株。建成区至少可增植乔木30万株。
Applying ArcGIS to interpret 2007 remote sensing images, we analyzed the canopy cover of Shanghai Pudong New Area (formerly). The total area of the study area is 533 km2, and the built-up area is 252 km2. The results showed that the existing canopy coverage rate was 7.02% in the study area, and the canopy coverage rate in the built-up area was 10.27%. The potential canopy coverage (technical level) in the study area reached 8.68% -9.79%, and the potential crown coverage in the built-up area reached 11.49% ~ 12.3%. The change of the gradient of the suburbs from the commercial center to the east canopy shows a gradual increase of canopy cover from the center city to the outskirts of the built-up area and reaches the highest value in the outer ring belt zone, and then decreases obviously outside the city. Canopy cover of different functional areas also showed a clear difference, the highest outer ring belt, followed by parks, roads, residential areas, commercial areas is the lowest. According to canopy cover estimates, there are about 3.68 million trees in Pudong New Area, of which 2.55 million are in built-up areas. At least 300,000 trees can be planted in the built-up area.