【摘要】 城市生态环境质量监测是实现城市绿色发展必不可少的环节，遥感技术以其监测范围大和能实时传输的优势被广泛应用于城市生态环境质量评价。为了客观全面地反映城市生态环境质量，采用遥感生态指数(remote sensing ecological index, RSEI)模型进行评价，而RSEI模型存在第一主成分贡献率不高的问题，使得评价结果不够准确。因此采用改进遥感生态指数(improved remote sensing ecological index, IRSEI),将原RSEI模型中的绿度指标归一化差值植被指数替换为通用归一化植被指数，从而构成IRSEI模型，以提高模型对生态环境质量评价的准确性。对南昌市2003—2021年Landsat遥感影像进行处理，得到南昌市生态环境质量的分布情况和变化趋势。结果表明：IRSEI的第一主成分贡献率较RSEI平均提高3.6%,湿度、绿度、干度、热度各年份平均相关度的均值提高7.2%;2003—2021年南昌市IRSEI总体均值变化不显著，生态质量较高的区域主要分布在鄱阳湖区域、梅岭和安义县，较低的区域主要分布在中心城区和西南方向的流湖镇。可见，2003—2021年南昌市总体生态环境质量呈先下降后持续上升的趋势。更多还原

【Abstract】 Urban ecological environmental quality monitoring is a necessary factor to achieve urban green development. Remote sensing technology is widely used in urban ecological environment quality evaluation with its advantages of large monitoring scope and real-time transmission. In order to objectively reflect the quality of the urban ecological environment, remote sensing based ecological index(RSEI) could be used for evaluation. However, the RSEI has the problem of the low contribution rate of the first principal component, which makes the evaluation results less accurate. Therefore, improved remote sensing ecological index(IRSEI) was used to improve the accuracy of the model in evaluating the ecological environment quality, which replaced normalized difference vegetation index(NDVI) with universal normalized vegetation index(UNVI). The Landsat remote sensing image of Nanchang City 2003—2021 was processed to obtain the distribution and change of the quality of ecological environment. The results show that the contribution rate of the first principal component of IRSEI was 3.6% higher than that of RSEI, and the average correlation degree of humidity, greenness, dryness and heat in each year was 7.2% higher than that of RSEI. From 2003 to 2021, the overall mean of IRSEI in Nanchang did not change significantly. The areas with high ecological quality were mainly distributed in Poyang Lake region, Meiling and Anyi counties, while the areas with low ecological quality were mainly distributed in the central city and Liuhu Town in the southwest. It is concluded that the overall ecological environment quality of Nanchang City showed a downward trend and then continued to rise from 2003 to 2021.更多还原