摘要
[目的]分析巢湖流域生态环境质量时空变化。[方法]利用巢湖流域2006年和2017年2个时相的Landsat系列卫星影像,采用新型的遥感生态指数(RSEI)对研究区这11年间的生态环境质量变化进行分析。[结果]随着城市建成区的不断扩展,巢湖流域生态质量总体出现下降趋势,研究时间内RSEI均值从0.562下降至0.500;生态环境较差和差的区域面积增加了2.63%,生态环境优良区域面积减少了18.79%。在空间分布上,合肥市区及舒城县生态质量相对较差,流域西南的岳西县部分地区和庐江县生态质量较好,且研究时间内合肥市区生态变差,肥西县北部和庐江县生态逐渐变好。[结论]总体来看,植被覆盖的减少和建筑用地的扩张是导致巢湖流域生态质量下降的重要因素。
[Objective] The research aimed to analyze the temporal and spatial changes in the ecological environment quality of the Chaohu Basin.[Method]Using the Landsat series of satellite images from the Chaohu Basin in 2006 and 2017, the new remote sensing ecological index (RSEI) was used to analyze the ecological environment quality changes in the study area during the 11 years.[Result]With the continuous expansion of urban built-up areas, the overall ecological quality of Chaohu Basin had decreased. The average RSEI value decreased from 0.562 to 0.500 during the studied period;the areas with relatively poor and poor ecological environment increased by 2.63%, and those with good ecological environment decreased by 18.79%.In terms of spatial distribution, the ecological quality of Hefei City and Shucheng County was relatively poor, and that of part of Yuexi County and Lujiang County was good. Besides, during the studied period, the ecological environment in Hefei became worse, while that in the north of Feixi County and Lujiang County became better.[Conclusion]Overall, the reduction of vegetation cover and the expansion of construction land are the important factors leading to the decline of ecological quality in the Chaohu Basin.
作者
李鸿芝
LI Hong-zhi(College of Geography and Tourism, Anhui Normal University,Wuhu,Anhui 241000)
出处
《安徽农业科学》
CAS
2019年第16期82-86,共5页
Journal of Anhui Agricultural Sciences
关键词
遥感生态指数
巢湖流域
生态环境
Landsat数据
Remote sensing ecological index(RSEI)
Chaohu Basin
Ecological environment
Landsat data
