The Influence of Large-Scale Construction on Remote Sensing Ecological Index in Surrounding Areas

Abstract

The construction of large-scale projects will have an impact on regional ecological quality, so it is of great significance for regional development to evaluate the ecological quality of large-scale projects and surrounding areas scientifically and accurately. In this paper, the outward extension of Beijing Daxing Airport is taken as the research area, with a total area of 165.439 square kilometers. Landsat-8 remote sensing images in 2013 (before the construction of the airport), 2017 (during the construction of the airport) and 2019 (after the construction of the airport) are selected. The support vector machine method was used to classify the land cover types in the study area, and the normalized vegetation index, surface temperature, humidity and dryness were extracted as ecological indexes to analyze the impact of large-scale projects on the surrounding areas before and after construction. The results showed that the overall remote sensing ecological index decreased from 2013 to 2019, vegetation decreased, impervious water surface and bare soil area increased, surface temperature increased, humidity and dryness increased.