Spatiotemporal Variation Analysis of Fractional Vegetation Coverage in Construction Control Zone Along Jiankou Great Wall in Beijing Based on GEE Cloud Platform
The study of dynamic changes of vegetation along the Great Wall is of great significance for the protection of the Great Wall itself and the safety and stabity of ecological environment where the Great Wall site is located. Taking Beijing Jiankou Great Wall Construction Control Zone as an example, based on Google Earth Engine( GEE) Cloud Platform, using Landsat remote sensing images from 2010 to 2021 to estimate Fractional Vegetation Cover ( FVC ) , the temporal and spatial variation characteristics and driving forces of FVC along the study area were analyzed with the help of topographic and meteorological data. The results show that:from 2010 to 2021, FVC along the study area presents a fluctuating upward trend, with a change rate of 0. 025/10 a. During 2010—2016 and 2016—2021, FVC showed an increasing trend, but the growth rate slowed down in the latter stage. In terms of spatial dimension, the FVC values along the study area from 2010 to 2021 showed a lower spatial pattern in the south and middle, and a higher spatial pattern in the north, and the vegetation restoration in non-construction areas were higher than that in restricted construction areas. In terms of driving force, the influence of each factor on FVC is as follows: elevation > temperature > precipitation > slope direction, and the influence of the interaction between elevation and temperature on the spatial pattern distribution of FVC reaches 0. 557 . The research results provide scientific basis for the authenticity and integrity protection of the Great Wall heritage and the construction of the Great Wall National Cultural Park.
Jiankou Great Wallfractional vegetation coverGoogle Earth Enginespatiotemporal variationgeodetector
万方数据
维普
