Dynamic Monitoring and Evaluation of Ecological Environment Quality of Shandong Peninsula Blue Economic Zone by Remote Sensing

Macro-monitoring and dynamic assessment of spatial and temporal status indicators of ecological environment quality and their changes in the land area of the Shandong Peninsula Blue Economic Zone are of great significance for ecological protection and regional high-quality development under the coordination of land and sea. Using the Google Earth Engine (GEE) cloud platform, based on the long-time dense sequence of Landsat series remote sensing images, we constructed the remote sensing ecological index (RSEI). This allowed us to achieve high-precision dynamic inversion and spatiotemporal analysis of regional ecological environment quality from 2000 to 2021. The results showed that: (1) The linear transformation relationship reduces the uncertainty caused by the difference of sensors, which is conducive to time-series analysis and spatiotemporal characteristics; (2) The ecological environment quality of the Shandong Peninsula Blue Economic Zone showed a fluctuating upward trend on the intensive time-series spatiotemporal change in past two decades, and the whole is at the medium level; (3) In the pattern of spatiotemporal change, the trend changed and the coefficient of variation showed that the spatial variation of ecological quality is significant, and the whole tends to be in the stable development of lower fluctuation, with significant improvement in the ecological quality of Dongying and Binzhou, basic stability in Yantai. These results affirmed the effectiveness of Shandong Province's commitment to land-sea integrated ecological sustainable development, resulting in improved ecological quality within the Shandong Peninsula Blue Economic Zone since its inception.