2000—2020年三峡库区生态环境质量综合评估

Ecological environment quality comprehensive evaluation in Three Gorges Reservoir Area from 2000 to 2020

客观综合地评估区域生态环境质量是现今全球关注和研究的热点问题。三峡库区自蓄水后,生态环境就变得比较脆弱,因此评价三峡库区生态环境质量十分必要。基于2000、2010、2020年的遥感数据,结合生态环境指数(EI)和遥感生态指数(RSEI)构建了三峡库区生态环境质量综合评价体系。结果表明,构建的生态环境质量综合评价体系能够有效实现三峡库区大尺度长时间序列的生态环境质量评价,精度可靠。2000—2010年三峡库区生态环境质量呈现下降趋势,而2010—2020年呈现上升趋势,2000—2020年整体上表现为上升趋势。空间上,三峡库区生态环境质量较好的区域主要分布在东部、北部和东南部的巫溪县、宜昌县、兴山县、石柱县和巴东市等;质量较差的区域主要分布在西南部和长江沿岸城市化进程较快的地区。

It is a hot issue of global concern and research to objectively and comprehensively evaluate regional ecological environment quality.Since the Three Gorges Reservoir Area has been impounded with water,the ecological environment has become relatively fragile,so it is quite necessary to evaluate the ecological environment quality of the Three Gorges Reservoir Area.Based on remote sensing data of 2000,2010 and 2020,ecological environment index(EI)and remote sensing ecological index(RSEI)was combined to construct an ecological environment quality comprehensive evaluation system in Three Gorges Reservoir Area.Results showed that the constructed ecological environment quality comprehensive evaluation system could effectively evaluate the ecological environment quality of Three Gorges Reservoir Area at a large scale for long time series,and the accuracy was reliable.The ecological environment quality showed a downward trend from 2000 to 2010,an upward trend from 2010 to 2020,and an upward trend as a whole from 2000 to 2020.In spatial,the areas with better ecological environment quality were mainly distributed in eastern,northern and southeastern cities like Wuxi County,Yichang County,Xingshan County,Shizhu County,Badong City,and so on;the areas with worse ecological environment quality were mainly distributed in areas with rapid urbanization such as the southwestern region and the riverside of Yangtze River.