Study on Temporal and Spatial Evolution Characteristics of Vegetation Coverage along Expressway Construction
Taking the Phnom Penh-Sihanoukville Expressway in Cambodia as the research object,this paper explores the influence of expressway construction on the vegetation coverage along the expressway by comparing and analyzing the spatial and temporal evolution characteristics of vegetation coverage before and after the expressway construction.The results show that,(1)during the construction of expressway,the average proportion of vegetation coverage below the medium level in the total area of the study area increased by nearly 6%compared with that before the construction of expressway,and the vegetation coverage decreased significantly;(2)compared with that before expressway construction,the proportion of vegetation coverage decreased during expressway construction increased by 12.5%,and the proportion of the highest level area of vegetation coverage stability along the line decreased by 14.8%;(3)there are differences in the influence of expressway construction on the surrounding environment in different spatial ranges along the line.With the increase of distance from the expressway,the influence of vegetation coverage on the whole is decreasing.The obvious influence of expressway construction on the surrounding environment along the expressway is within 500m from the expressway on both sides of the expressway,and that within 250m from the expressway on both sides of the expressway is the most affected area.This study is conducive to the protection of the ecological environment along the highway,providing a scientific basis for the design,construction and management of the highway,and safeguarding the sustainable development of the highway.
the Phnom Penh-Sihanoukville Expresswayvegetation coveragespatio-temporal changesvegetation along the line
万方数据
维普
