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- Title
基于改进遥感生态指数的南昌市生态环境 质量监测与评价.
- Authors
王新驰; 鲁铁定; 龚循强; 周秀芳
- 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.
- Publication
Science Technology & Engineering, 2023, Vol 23, Issue 35, p15319
- ISSN
1671-1815
- Publication type
Article