基于遥感技术的通州新城区森林生态价值评估

介绍了运用遥感技术,快速、准确评估通州新城区森林生态价值的方法和试验结果.先用高分辨率影像将地物分类,主要包括树林、草地/灌木等;然后运用CITYgreen软件,选取适当的参数,估算出通州新城区的森林覆盖率、碳储备,以及森林在吸收有害气体、吸附有害微粒方面的生态价值.结果显示,通州新城区森林覆盖面积约803.75公顷,覆盖率为6.4%,碳储备约85,463吨,生态价值相当于1,025,500美元.接着,估算了不同覆盖率下的城市森林生态功能及相应价值.最后,论文讨论了该方法和CITYgreen模型的优缺点,以及下一步将要作的改进.

Evaluation of ecological value of urban forest in new Tongzhou Town based on remote sensing technology and CITYgreen model

This paper presents the process and results of a fast, accurate estimation about urban forest in new Tongzhou Town and utilizes remote sensing images and CITYgreen. Firstly, some main types of land cover are classified on high resolution Quickbird images, including urban forest, grassland/scattered small trees, etc. After that, some proper parameters are chosen in CITYgreen. Subsequently, CITYgreen analysis is run and a report is created. In the report, forest coverage rate and carbon storage of new Tongzhou Town are estimated, as well as the ecological value of urban forest in air pollution removal. The results show that the forest coverage area in new Tongzhou Town generally amounts to 804.371 hectares and carbon storage is approximately up to 85,463 tons. According to the CITYgreen report, the equivalent ecological value of urban forest in new Tongzhou Town comes to USS 10,025,500. Besides, the results under different coverage rates are calculated. At the end of this paper, some details and both advantages and disadvantages of the method and software are discussed, and some conceivable improvements in the following research are pointed out as well.