矿业城市植被覆盖度空间提取及时空分析——以徐州市为例

Spatio-temporal analysis of vegetation cover in mining city-A case study of Xuzhou city

摘要:

在GEE平台上基于遥感数据,通过归一化植被指数提取矿业城市徐州市植被空间信息,利用Landsat遥感影像得到徐州1984-2018年的植被覆盖空间分布结果,并对植被变化与不透水面进行相关性分析。结果表明:1984年-2018年,徐州的植被覆盖度由48.62%增加至53.42%,年均增加0.14%,植被覆盖度由低向高逐渐转化。矿区分布较多的铜山区植被面积持续增加,变化速度最快;贾汪区和九里区在2000年之前植被面积缓慢减少,2000年之后,植被面积持续增加,植被覆盖情况有所改善;泉山区、云龙区、鼓楼区整体植被变化不大;研究区整体植被覆盖面积和不透水面面积呈负相关关系。徐州市在转型发展过程中,注重生态环境保护,为其他资源枯竭型城市的发展提供了可借鉴的经验。

Abstract:

In this study,the spatial information of urban vegetation was extracted through the normalized vegetation index based on the remote sensing data on the GEE platform.Using the Landsat remote sensing images from 1984 to 2018,the spatial distribution map of vegetation coverage in Xuzhou,a mining city,was obtained.The results showed that from 1984 to 2018,the vegetation coverage of Xuzhou increased from 48.62% to 53.42%,with an annual increase of 0.14%,and the vegetation coverage gradually changed from low to high.The vegetation area in Tongshan District with the wide distribution of mining areas,continued to increase at the fastest rate.The vegetation area in Jiawang District and Jiuli District decreased slowly before 2000,followed by a continuing increase after 2000.The overall vegetation change in Quanshan District,Yunlong District,and Gulou District had little change.The overall vegetation coverage area and impervious surface area showed a negative correlation.During the transformation and development,Xuzhou City pays attention to ecological and environmental protection,which provides lessons for the development of other resource-exhausted cities.