基于“3S”的德阳市生态环境质量评价

The Ecological Environment Quality Evaluation of Deyang City Based on the 3S

论文以四川省德阳市为研究区,Landsat卫星影像为数据源,选取土地覆盖、植被覆盖度和海拔高程三个评价指标,采用定性与定量相结合的主成分分析法对德阳市2015年生态环境质量进行评价,将德阳市生态环境质量分为优、良、中、差四个等级。结果表明:林地、草地的生态环境质量较好,其次耕地,人类工程活动和地质灾害区域的生态环境质量差,该结果与实际情况相符,说明参评因子和模型的选择客观合理。

This paper takes Deyang city of Sichuan province as the study area, Landsat satellite image as data source, select the land cover, vegetation coverage and elevation of three evaluation indexes, the principal components using a combination of qualitative and quantitative analysis methods to evaluate the ecological environment quality in Deyang city in 2015, the ecological environmental quality of Deyang city was divided into excellent, good, medium, poor in four grades. The results show that the ecological environment quality of woodland and grassland, arable land, human engineering activities and geological disaster area ecological environment quality is poor, the results are consistent with actual situation, indicating factors and model selection objective and reasonable.