Dynamic Evaluation of Ecological Environmental Quality of Zhoushan Island Using Google Earth Engine

• Published in: Shuitu baochi tongbao Vol. 43; no. 2; pp. 293 - 302
• Main Authors: Sizheng Li, Liuzhu Wang, Sheng Zhao, Feng Gui
• Format: Journal Article
• Language: Chinese
• Published: Science Press 01.04.2023
• Subjects: environmental assessment; remote sensing environmental index (rsei); zhoushan island
• ISSN: 1000-288X
• DOI: 10.13961/j.cnki.stbctb.2023.02.034

[Objective] The ecological environmental changes of Zhoushan Island from 2000 to 2020 were dynamically monitored and evaluated in order o provide a scientific reference for the evaluation of the ecological quality of similar island areas. [Methods] Remote sensing images of Zhoushan Island in 2000, 2005, 2010, 2015, and 2020 were selected on the Google Earth Engine (GEE) platform. Wetness, greenness, heat, and dryness were extracted for coupling, and the remote sensing environmental index (RSEI) was obtained. The principal component analysis method was then used to evaluate changes in the quality of the ecological environment of Zhoushan Island. [Results] ① The mean values of RSEI on Zhoushan Island at the five time points were 0.631 2, 0.637 5, 0.611 6, 0.550 3, and 0.502 4, respectively, with a total decrease of 20.41% over the study period. ② The ecological quality of Zhoushan Island exhibited a downward trend over time, with the area of the island having excellent and good ecological quality decreasing by