摘要
以西昌市2015和2019年Landsat-8OLI影像为数据源,通过建立遥感生态指数(RSEI)模型来研究该区域生态环境的时空变化;并结合与城镇化相关的因子,探讨了城市化进程对西昌市生态环境的影响。结果表明:2015—2019年期间,西昌市RSEI均值由0.54降低到0.52,生态环境表现出轻微变差的趋势,且主要由生态环境质量中等以下区域面积增加导致;西昌市生态环境动态变化剧烈,且有较严重的恶化趋势,生态环境变差的比例达27.4%,主要集中在全域中部沿河流条带状分布的西侧人口聚居区,以及部分分布有村庄的山区;此外,城镇化进程会对区域生态环境质量产生一定的抑制性作用。研究结果可为西昌市生态环境改善、生态文明城市建设提供科学依据。
This study employed the 2015 and 2019 Landsat8/OLI images of the Xichang city as data sources,and the remote sensing ecological index(RSEI)model was established to study the spatial and temporal changes of the ecological environment in the study area between 2015 and 2019.And the impact of ecological environment to urbanization processes had been discussed by combining with the factors related to urbanization in Xichang city.The results showed that the average RSEI value of Xichang city decreased from 0.54 to 0.52 during 2015-2019,and the ecological environment showed a slight deterioration trend,which was mainly caused by the increase in the area below the medium ecological environment quality.The dynamic change of ecological environment in Xichang city was violent,and there was a serious deterioration trend.The proportion of ecological environment deterioration reached 27.4%,mainly concentrated in the central part of Xichang and along the river strip distribution of the western population settlements,and some mountainous areas with villages.In addition,the urbanization process will have a certain inhibitory effect on the regional ecological environment quality.The research results can provide scientific basis for the improvement of ecological environment and the construction of ecological civilization city in Xichang city.
作者
曹露
罗川
CAO Lu;LUO Chuan(School of Resources and Environment,Xichang University,Xichang 615013,China)
出处
《测绘与空间地理信息》
2023年第4期122-126,共5页
Geomatics & Spatial Information Technology
