EVALUATION OF ECOLOGICAL ENVIRONMENT OF LALIN RAILWAY DURING CONSTRUCTION PERIOD BASED ON HIGH RESOLUTION REMOTE SENSING

Ecological environment protection is an important issue in railway construction. Traditional ecological environment evaluation relies on artificial ground survey, so it is difficult to obtain accurate information of ecological environment change in a large range. In this study, based on high-resolution remote sensing and information extraction technology, the land use types and vegetation cover information of the Lalin Railway in 2015, 2018 and 2020 were extracted. Furthermore, the changes of land use type, vegetation cover and habitat quality index during the railway construction period were analyzed, and the influence of railway construction on the ecological environment along the railway was evaluated. The results show that the railway mainly occupied the unused land with less vegetation cover. Compared with before the construction, the vegetation cover index and ecological environment quality index have decreased. However, the decrease degree of these indexes is small and there is no obvious disturbance to the ecological environment. The evaluation of ecological environment impact in railway construction period based on high resolution remote sensing can improve the work efficiency and provide reference for other engineering ecological environment assessment by remote sensing.