基于遥感生态指数的杭州市城市生态变化  

Ecological Change in the Hangzhou Area Using the Remote Sensing Based Ecological Index

作　　者：刘智才[1,2] 徐涵秋[1,2] 李乐[1,2] 唐菲[1,2] 林中立 

机构地区：[1]福州大学环境与资源学院,福建福州350116 [2]福州大学遥感信息工程研究所,福建福州350116

出　　处：《应用基础与工程科学学报》2015年第4期728-739,共12页Journal of Basic Science and Engineering

基　　金：国家科技支撑项目(2013BAC08B01-05)

摘　　要：中国目前正处于城市化快速发展的阶段,城市化在发挥其正效应的同时,也不可避免地带来了负面影响,城市生态退化就是其中之一.因此,及时快速地监测城市扩展引起的生态变化便显得非常重要.本文利用杭州市1989年、2000年和2010年3个时相的Landsat系列卫星影像,采用新型的遥感生态指数(RSEI)评估了杭州市从1989—2010年这21年间的生态变化.研究发现,随着城市建成区的不断扩展,杭州市总体生态质量有了明显下降,其RSEI均值从1989年的0.625分别下降到2000年的0.609和2010年的0.555,生态优良等级所占面积的比例也从1989年的66.57%分别下降到2000年的61.72%和2010年的40.04%.在空间上,杭州市生态质量的变化呈现出新建城市"副中心"变差,老城区变好的特点.总的看来,建筑用地的大量扩张是导致杭州市生态质量下降的最重要因素.China is currently undergoing rapid urbanization,which inevitably brings negative impacts on the country＇s eco-environment. The degradation of urban ecological quality is one of the most serious problems. It appears urgent for the country to monitor the dynamics of the ecological conditions timely and fast. In this paper,using Landsat imagery,we evaluated ecological environment changes of the Hangzhou area from 1989 to 2010 with a recentlyproposed remote sensing based ecological index（ RSEI）. The results show that the overall ecological quality of Hangzhou had asignificant decline accompanied with the expansion of urban built-up area. The mean values of RSEI fell to 0. 609 in 2000 and 0. 555 in 2010 while it was 0. 625 in 1989,and the proportion of high-grade RSEI area also fell from 66. 57% in 1989 to 61. 72% in 2000 and then to 40. 04% in 2010. The spatial analysis of the ecological change of Hangzhou reveals that the ecological quality has become worse in the newly-developed urban sub-center areas. In spite of this,the ecological condition in the old city center area has been improved The most crucial factor which leads to the decline of the ecological quality of Hangzhou during the study period is the fast expansion of the built-up land in Hangzhou.

关 键 词：杭州 遥感生态指数 城市化 生态变化 遥感 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]