| Summary: | A rapid grasp of the ecological environment quality and change trend has an important reference value for detection and management of regional ecological environment. Based on Landsat 8 remote sensing images from 2013 to 2019,the eco-green integration antecedent promoter region of Yangtze River Delta was taken as a research object. Ecological environment characteristics were studied by quantitative descriptive analysis with the help of the remote sensing ecological index(RSEI) model. Combined with climate data and statistical data,the ecological environment change in the study area was analyzed and evaluated. The results showed that the average RSEI was 0.71 and the ecological environment quality of research area from 2013 to 2019 was generally good. The RSEI values could be divided into five grades:bad,poor,general,good and excellent. Areas with good or excellent ecological environment quality exceeded 60% on average. However,the general regions accounted for 25%,which distributed near the districts and villages,and the poor and bad regions accounted for 15%. That meant there was still plenty of room for improvement in the ecological environment quality. In space,the data was higher in the south and lower in the north and in time it showed an upward-downward-upward trend. The main factors that led to the overall decline of regional ecological environment quality were the decline of vegetation coverage and humidity. In 2019,the ecological environment quality has been significantly improved,which was directly related to the ecological effect brought by continuous improvement of regional water system area and the increase of total vegetation cover. Generally speaking,the areas with deteriorating ecological quality were reduced and have an obvious improvement trend. It laid a good foundation for the development of eco-green integration.
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