Abstract: Linear project construction is very common in construction projects. It plays an important role in accelerating socio-economic development and improving living standard, but brings about a series of ecological and environmental problems. Therefore, assessing the eco-environmental impacts of linear project construction is of great practical significance. This paper summarized the main types of linear project construction and their ecological and environmental impacts, analyzed the importance of eco-environmental assessment of linear project construction, and introduced the applications and related researches of eco-environmental assessment in linear project constructions. The prominent problems in current related studies were discussed, and the future research directions were suggested. It was considered that, to integrate the geographic information system and the remote sensing and modelling simulating techniques, to improve evaluation methods through establishing more quantitative and accurate assessment systems, to achieve the indices systematization while paying attention to the scale effect of assessment scope, and thus, to make the eco-environmental impact assessment more scientific and credible would be the development directions for the eco-environment assessment of linear project construction.

Key words: heat balance method, stem sap flow, time-lag effect.