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Arid Land Geography ›› 2024, Vol. 47 ›› Issue (2): 248-259.doi: 10.12118/j.issn.1000-6060.2023.162

• Ecology and Environment • Previous Articles     Next Articles

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

XUE Huazhu1(), YUAN Qian1, DONG Guotao1,2,3(), YAO Nan1, ZHANG Qing1   

  1. 1. School of Surveying, Mapping and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China
    2. Heihe Water Resources and Ecological Protection Research Center, Lanzhou 730030, Gansu, China
    3. Yellow River Conservancy Research Institute, Yellow River Conservancy Commission, Zhengzhou 450003, Henan, China
  • Received:2023-04-13 Revised:2023-07-15 Online:2024-02-25 Published:2024-03-14
  • Contact: DONG Guotao E-mail:xhz@hpu.edu.cn;dongguotao@hhglj.yrcc.gov.cn

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