基于基线遥感生态指数的鄂尔多斯市生态质量分析

doi:10.12118/j.issn.1000－6060.2023.162

Abstract

Abstract:

Ordos City is an important steppe desert and agropastoral ecotone in the Yellow River Basin, China. Studying the changes in ecological quality in Ordos City is important for supporting the ecological conservation and high-quality development of the Yellow River Basin. Herein, the remote sensing imagery of a moderate-resolution imaging spectroradiometer was used as a data source to calculate the baseline remote sensing ecological index (B_RSEI) of Ordos City by improving the conventional normalization and principal component analysis. This study also analyzes the characteristics of ecological quality changes from 2001 to 2019. The results indicate the following: (1) B_RSEI exhibits stable directionality and integrity, offering an enhanced reflection of long-term changes in ecological quality. From 2001 to 2019, B_RSEI of Ordos City showed a fluctuating increase and a spatial differentiation of higher in the east and lower in the west. (2) The surface water content index (SWCI) is the primary factor promoting B_RSEI and serves as the main factor explaining the B_RSEI distribution. The land surface temperature (LST) is the main factor inhibiting B_RSEI, with its most substantial interaction. (3) The ecological quality of Ordos City has improved, covering 67.13% of the total area, with notable ecological management effects in the Jungar Banner, Kangbashen District, and Ejin Horo Banner areas. This study demonstrates an overall improvement in the ecological quality of Ordos City, emphasizing the usefulness of B_RSEI in analyzing interannual changes. This could provide a reference for the ecological governance of the Ordos City and high-quality development of the Yellow River Basin.

Key words: ecological quality, B_RSEI, principal component analysis, Ordos City

XUE Huazhu, YUAN Qian, DONG Guotao, YAO Nan, ZHANG Qing. Ecological quality analysis of Ordos City based on the baseline remote sensing ecological index[J].Arid Land Geography, 2024, 47(2): 248-259.

Figures/Tables 10

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指标	PC1	PC2	PC3	PC4
EVI	0.47	0.40	0.44	0.65
SWCI	0.50	0.29	0.32	-0.75
NDBSI	-0.42	-0.34	0.84	-0.06
LST	-0.59	0.80	0.02	-0.07
特征值	0.0545	0.0099	0.0022	0.0013
贡献率/%	80.35	14.53	3.22	1.90

交互因子	2001年	2010年	2019年	交互因子	2001年	2010年	2019年
SWCI∩EVI	0.94	0.89	0.93	NDBSI∩降水量	0.90	0.88	0.92
SWCI∩NDBSI	0.94	0.90	0.94	NDBSI∩人口	0.87	0.82	0.87
SWCI∩LST	0.97	0.97	0.97	NDBSI∩高程	0.88	0.87	0.88
SWCI∩降水量	0.94	0.93	0.94	NDBSI∩GDP	0.85	0.78	0.85
SWCI∩人口	0.91	0.88	0.91	LST∩降水量	0.82	0.82	0.84
SWCI∩高程	0.93	0.88	0.91	LST∩人口	0.80	0.82	0.83
SWCI∩GDP	0.90	0.85	0.90	LST∩高程	0.81	0.83	0.84
EVI∩NDBSI	0.92	0.92	0.92	LST∩GDP	0.79	0.81	0.83
EVI∩LST	0.97	0.97	0.98	降水量∩人口	0.52^**	0.58	0.62
EVI∩降水量	0.88	0.89	0.91	降水量∩高程	0.54^**	0.60	0.63
EVI∩人口	0.87	0.87	0.89	降水量∩GDP	0.34^**	0.46	0.52
EVI∩高程	0.88	0.86	0.88	人口∩高程	0.52	0.53	0.51
EVI∩GDP	0.86	0.85	0.88	人口∩GDP	0.34	0.41	0.44
NDBSI∩LST	0.96	0.94	0.96	高程∩GDP	0.37	0.31	0.30

Ecological quality analysis of Ordos City based on the baseline remote sensing ecological index

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