摘要
利用1999年和2010年的TM卫星遥感影像,定量反演了抚顺市域的热场和植被指数,并对其变化进行了分析。结果表明,11a全市的平均热场温度升高了1.53℃,城市热岛主要集中在抚顺市的城市建成区以及苏子河河谷和黑大线沿线地带,但强热岛和极强热岛的空间分布范围2010年较1999年压缩幅度空前。从植被盖度总体情况来看,高覆盖度植被覆盖面积均在60%以上,而全市低覆盖度等级以下的植被面积比例很小,其面积比例都在1.5%以下。从植被盖度的变化看,高覆盖度和较高覆盖度的植被面积比例分别下降了3.22%和2.31%;而中覆盖度的植被面积比例增加了4.94%,其变化最大的区域在抚顺市区,该区域变化的比率是全市变化的3～5倍。从热场与植被的变化原因来看,首先是受植物生长季节气候的暖干化变化趋势的影响,其次还与土地利用类型中耕地和草地的减少以及建设用地的快速增加有关,此外,抚顺市生态建设工作对其也有一定程度的影响。
Land use and land cover change is one of the hot issues in the study of global change,while surface temperature and vegetation are the important parameters to describe land cover characteristics.In this paper,TM satellite remote sensing images in 1999 and 2010 have been used to quantitatively analyze the urban thermal field and vegetation index of Fushun,provided theoretical and practical basis for the spatial layout and key construction of Fushun＇s construction of forest city.The results showed that,in the past 11 years（1999~2010）,the average temperature of the thermal field of the city increased by 1.53 ℃,and the Urban Heat Island（UHI） concentratedly distributed in the built-up urban area of Fushun,as well as the Suzi River Valley and along the Heida highway,but the space distribution has been unprecedentedly compressed,distributed only in the built-up urban area.NDVI of Fushun edged down from 0.4764 in 1999 to 0.4756 in 2010.From the overall situation of vegetation coverage,the percentage of the area of high vegetation coverage is more than 60%,even more than 78%,whereas the percentage of the area of vegetation coverage below is very small,lower than 1.5%.From the variation of vegetation coverage,in the past 11 years,the percentage of the area of both high and relatively high vegetation coverage decreased by 3.22% and 2.31% respectively,and the percentage of the area of middle vegetation coverage increased by 4.94%,which,in total,shows that the city＇s ecological environment has been deteriorated.From the spatial change of vegetation coverage of the city,largest change area is the urban district,whose change is about 3 to 5 times more than the whole city.The change reasons of the thermal field and vegetation are：Firstly,the influence is from the warm and dry climate in the growing season.Secondly,the cropland and grassland decreased,while the land for construction increased rapidly.In addition,it has been influenled by the ecological construction of Fushun.
出处
《遥感技术与应用》
CSCD
北大核心
2012年第2期256-264,共9页
Remote Sensing Technology and Application
基金
国家科技部"十二五"科技支撑项目(2011BAD38B03)
关键词
相对亮温
植被指数
植被盖度
动态变化
抚顺市
Relative brightness temperature
Vegetation index
Vegetation coverage
Dynamic change
Fushun
