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Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (3): 107-118.DOI: 10.7522/j.issn.1000-694X.2022.00148

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Study of ecological environmental quality changes in the upper Yellow River basin based on remote sensing ecological index

Yating Cui1(), Huan Li1,2(), Longxiao Zheng1, Mengquan Wu1   

  1. 1.School of Resources and Environmental Engineering /, Ludong University,Yantai 264025,Shandong,China
    2.School of Business, Ludong University,Yantai 264025,Shandong,China
  • Received:2022-09-30 Revised:2022-11-20 Online:2023-05-20 Published:2023-05-31
  • Contact: Huan Li

Abstract:

As the water source of the Yellow River, the upper Yellow River basin is an important ecological function area in China. Analysis of ecological environmental quality changes in the upper Yellow River basin is important for ecological protection and high-quality economic development of the Yellow River basin. Based on Google Earth Engine platform, this paper analyzes the change of ecological environment quality in the upper Yellow River basin from 2000 to 2021 through remote sensing ecological index (RSEI). The results show that: (1)The RSEI of the upper Yellow River basin is elevated. At the same time, it has the characteristics of stages. 2000-2005 is the stage of deterioration of ecological environment quality, and 2006-2021 is the stage of improvement of ecological environment quality. It is poor and moderate, accounting for 64.78% of the total area of the region. (2)The ecological quality of different river sections is different significantly, with the best ecological quality in the river source section and the worst ecological quality in the alluvial plain section. (3)The spatial clustering characteristics of ecological environment quality in the upper Yellow River basin are obvious, where high-high clustering areas are stably distributed near the river source section and low-low clustering areas are distributed in the canyon section and alluvial plain section where the intensity of human activities is higher. (4)Greenness, humidity, heat and dryness all have significant effects on the ecological quality of the upper Yellow River basin, with greenness as the dominant driver and dryness as the secondary driver. The increase of vegetation cover, climate regulation and soil and water conservation have significantly contributed to the ecological improvement of the upper Yellow River basin.

Key words: upper Yellow River basin, Google Earth Engine, remote sensing ecological index, geographical detectors, Mann-Kendall trend test

CLC Number: