[Ecological quality assessment and the impact of urbanization based on RSEI model for Nanjing, Jiangsu Province, China]. / åºäºRSEI模åççæè´¨éè¯ä¼°ååéåå½±å以å京å¸ä¸ºä¾.
Ying Yong Sheng Tai Xue Bao
; 31(1): 219-229, 2020 Jan.
Article
in Zh
| MEDLINE
| ID: mdl-31957399
ABSTRACT
Using Landsat 5/TM and Landsat 8/OLI images in 2000 and 2017, based on remote sensing ecological index (RSEI) model, combined with meteorological observation data and socio-economic data in Nanjing from 2000 to 2017, we analyzed and evaluated the ecological environment changes and the characteristic ecological areas in Nanjing. The results showed that the average RSEI of Nanjing decreased from 0.626 to 0.618 during 2000-2017. The RSEI values could be divided into five grades bad, poor, fair, good and excellent. The proportion of area above good grade decreased from 61.0% to 57.1%, while that below poor grade increased slightly. Compared with 2000, the proportion of areas with improved ecological environment quality was 34.5%, 34.7% area had deteriorated, and 30.8% area remained unchanged in 2017. Among them, the ecological quality of main urban area had significantly improved, and the area with improved ecological quality exceeded that of deterioration. The ecological quality of new urban area and suburbs had deteriorated. The area with poor ecological environment exceeded the area of improvement. Among the three ecological protection areas, the ecological quality of Zijin Mountain was significantly better than that of Laoshan Mountain and Jiangxinzhou. The urbanization rate was negatively correlated with RSEI, with a correlation coefficient of -0.91. The urbanization process would have negative impacts on the ecological environment in general. However, strict protection and management measures could maintain the good ecological environment even improve it.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Urbanization
/
Ecosystem
Type of study:
Prognostic_studies
Country/Region as subject:
Asia
Language:
Zh
Journal:
Ying Yong Sheng Tai Xue Bao
Journal subject:
SAUDE AMBIENTAL
Year:
2020
Document type:
Article
Affiliation country:
China