厦门市中心区城市森林树冠覆盖及潜力分析

Analysis of Urban Tree Canopy Cover and Potentiality in the Urban Region of Xiamen

应用RS和GIS技术,解译并分析了厦门市中心区2009年城市森林树冠覆盖及潜在树冠覆盖。结果表明:研究区现有树冠覆盖率为25.71%,其中,公园树冠覆盖面积最大,占61.79%,道路树冠覆盖面积最小。因功能定位及发展阶段不同,各行政区拥有的树冠覆盖面积和树冠覆盖率差别较大,鼓浪屿树冠覆盖率最高,为46.80%;湖里区最低,为13.06%。研究区斑块数量具有小型斑块占优势的特点,这一方面反映出厦门市中心区城市用地较为紧张的现状,另一方面也反映了我国城市化区域经常采用见缝插绿等方式建设的城市森林破碎化程度高。厦门市中心区潜在树冠覆盖率可达到27.99%,其中道路树冠覆盖斑块潜在可增加数量最多,说明厦门市中心区道路现状覆盖虽然相对破碎,但未来形成连续覆盖的潜力最大。

The experiment was conducted to analyze tree canopy coverage landscape of the urban region in Xiamen in 2009 by re- mote sensing and GIS technology. The ratio of tree canopy coverage is 25.71%. Park forests are dominant （61.79%） and roadside trees are the lowest among three types. Tree canopy coverage area and ratio are obviously significant because of different function classification and developmental stage in each district, and the highest （46.80%） is in Gulangyu Island and the lowest （ 13.06% ） is in Huli District. The number of the planted small-sized patches is the most in the urban re- gion of Xiamen. Urban land is relatively scarce and urban forest is relatively fragmental. The potential tree canopy cover （technical） rate reaches to 27.99%, and the roadside trees type, being the most at potential tree canopy cover patch numbers, has the most potential for forming continuous coverage patch in future.