Dynamic monitoring of ecological and environmental quality of the Nanliu River basin, supported by Google Earth Engine
To explore the temporal and spatial changes of the ecological and environmental quality in the Nanliu River basin from 2000 to 2019, the Google Earth Engine(GEE) platform was used to optimize the reconstruction of Landsat images of the Nanliu River basin from 2000 to 2019. Coupling the vegetation gr...
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| Autores principales: | , , , |
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| Formato: | article |
| Lenguaje: | ZH |
| Publicado: |
Agro-Environmental Protection Institute, Ministry of Agriculture
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/3d737e367e7b4935b8cfcb5a79ec26e4 |
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| Sumario: | To explore the temporal and spatial changes of the ecological and environmental quality in the Nanliu River basin from 2000 to 2019, the Google Earth Engine(GEE) platform was used to optimize the reconstruction of Landsat images of the Nanliu River basin from 2000 to 2019. Coupling the vegetation greenness, humidity, temperature of the earth's surface, soil dryness, and other ecological environment indicators facilitated the construction of a remote sensing ecological index(RSEI) to monitor and evaluate the ecological and environmental quality of the Nanliu River basin. The ecological and environmental quality of the Nanliu River basin showed an improvement year on year from 2000 to 2019. The average RSEI increased from 0.543 4 in 2000 to 0.636 4 in 2019. The transfer of area in the ecological and environmental quality of the Nanliu River basin change was mainly a shift from medium ecological risk grade to good ecological grade. In the upper reaches of the basin, the area of medium ecological grade decreased by 29.90 percent points, and the area of good ecological grade downstream increased by 28.11 percent points. Studies have shown that the use of the GEE platform to reconstruct annual, cloud-free images can facilitate long-term monitoring and evaluation of the ecological environment quality in areas of perennial cloud cover. |
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