基于遥感的杭州余杭森林景观格局变化

Forest landscape analysis with remote sensing data for Yuhang,Zhejiang Province

森林作为重要的景观组分,在城市化过程中受到强烈影响。杭州市余杭区位于沪嘉杭地区,对今后众多内陆中小城市的发展有一定的预示性。以余杭区1978年陆地资源卫星Landsat/MSS,1990年Landsat/TM和2003年的Landsat/ETM假彩色合成影像为原始数据,由地理信息系统(GIS)软件的辅助并结合地面资料进行处理,利用景观格局分析系统Fragstats 3.3计算景观格局指数,以此对研究区的森林资源的景观格局和变化进行研究。研究结果表明,人类活动主要影响森林景观破碎度以及森林覆盖面积。森林景观破碎度表现为先增后减,森林覆盖面积表现为先减后增。经济林受人类活动影响最为明显。人类活动对于城郊森林景观结构的变化起了重要的作用。

Forests, which have been strongly influenced during the process of urbanization, are an important component of the landscape. Yuhang District of Hangzhou, Zhejiang Province was selected as a case study to help understand the development of middle- and small-size towns in China. Remote sensing data from Landsat / MSS in 1978, Landsat / TM in 1990, and Landsat / ETM in 2003 of landscape pattern changes for forests in Yuhang District were studied using GIS and Fragstats software. Seven landscape types includes bamboo plantation, non-timber forest, coniferous forest, broad-leaved forest, building lot, farmland., waterbody. Results showed that human activities were the primary factors affecting forest landscape fragmentation and forest coverage. During the period of 1978 to 2003, landscape fragmentation changed from high to low and forest coverage went from low to high. Also, human activities had a strong influence on non-timber forest. The results suggested that human activities played an important role in structural changes of the suburban forest landscape. [Ch, 2 fig. 8 tab. 22 ref.]