Eco-environment Quality Evaluation based on Remote Sensing overQingjiang, Hubei

摘要

The vegetation eco-environment is one of the import constituent elements for the human eco-environment. This articleassesses the vegetation ecol-environment quality(VEQ) over part of the Qingjiang region by using TM remote sensing image and principal component analysis ( PCA ) method. There are various geographical and ecological features havingeffect on eco-environment of Qingjiang region, Hubei province. The paper gives an evaluation index system of VEQ byanalyzing regional geographical and ecological features, which are composed of 5 factors on vegetation cover , topography & geomorphology, moisture, land cover and hydrothermal regime. These factors are extracted from theTM remote sensed data. The PCA method is used to calculate the weight of every index. Based on these indices, anintegrated evaluation model of eco-environment quality is built. With the model, the study region is evaluated anddivided into five VEQ evaluation classified ranks. It is concluded that the VEQ in our study region is good as a wholeand the leading VEQ rank is II and III have occupied the proportion of 76.09%.