Abstract
Ecological environment quality is a long-term continuous concept that is affected by various environmental factors. Its assessment has important implications for implementing the planning and protection of dynamic regional ecosystems. Therefore, this study attempted to obtain these indicators (green, dry, wet, heat) through the Google Earth Engine (GEE) platform, and then coupled the ecological environment quality index in the middle reaches of the Yangtze River Basin (MYRB) between 2000 and 2019, based on the remote sensing ecological index (RSEI). The major results show that: (1) changes in the four indicators in summer were more obvious than those in winter, and the changes were concentrated in the central and northern regions of the MYRB; (2) both the modified normalized difference water index (MNDWI) and normalized differential build-up and bare soil index (NDBI) in summer and winter have higher weighting ratios, implying that water body changes and human activities had a greater impact on the ecological environment; and (3) ecological environment quality in the MYRB between 2000 and 2019 was relatively flat. The ecological conditions began to deteriorate in 2008, and substantial ecological degradation was noted in some areas between 2008 and 2019 (18.7% in the central region, 16.0% in the eastern region). The MYRB has an important position in the Yangtze River economic belt and is an important part of the Yangtze River protection. This research could provide a theoretical basis and decision support for the development and protection of the Yangtze River Basin (YRB) green economy.
Highlights
With rapid industrial development and urban expansion, increasingly intense changes in climate have gradually become an issue of common concern to the international community [1]
Ecological environment quality is a concept used to measure the level of ecological environment, which expresses the suitability of the ecosystem ecological environmental factors in a specific spatial and temporal range for human survival and social economic development [7]
The results showed that the NDVI of the middle reaches of the Yangtze River Basin (MYRB)
Summary
With rapid industrial development and urban expansion, increasingly intense changes in climate have gradually become an issue of common concern to the international community [1]. Extreme weather events (e.g., droughts, floods, rainstorms, and tropical typhoons) have occurred frequently, seriously affecting daily life and economic development [3]. With urban expansion, droughts, floods, water pollution, and other problems are becoming increasingly serious, as they are aggravated by climate change [4]. Both have seriously affected the ecological environment [5]. Ecological environment quality is a concept used to measure the level of ecological environment, which expresses the suitability of the ecosystem ecological environmental factors in a specific spatial and temporal range for human survival and social economic development [7].
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