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Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (5): 74-84.DOI: 10.7522/j.issn.1000-694X.2023.00029

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Remote sensing evaluation and driving force analysis of ecological environment in Gonghe Basin

Wanfeng Su1(), Guangzhao Han1, Deli Ye2, Guangchao Cao1,3()   

  1. 1.MOE Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation / Qinghai Province Key Laboratory of Physical Geography and Environmental Process,College of Geographical Science,Qinghai Normal University,Xining 810008,China
    2.Huanghe Hydropower Development Co. ,Ltd. ,Xining 810008,China
    3.Academy of Plateau Science and Sustainability,People's Government of Qinghai Province & Beijing Normal University,Xining 810008,China
  • Received:2022-11-23 Revised:2023-04-12 Online:2023-09-20 Published:2023-09-27
  • Contact: Guangchao Cao

Abstract:

Scientific assessment of regional ecological environment quality is a prerequisite for achieving sustainable development. In this paper, based on Landsat remote sensing images from 2000 to 2020, remote sensing ecological index (RSEI) was constructed to analyze the spatial and temporal variation characteristics of ecological environment quality in the typical alpine sand region of the Qinghai-Tibet Plateau in the past 20 years, and the main driving factors of ecological environment in this region were quantified using using geographic detectors. The results showed as follows: (1) The mean RSEI of Gonghe Basin increased from 2000 to 2020, with an average increase of 7.5%/10a, showing spatial distribution characteristics of high in the east and low in the west, high in the south and low in the middle. (2) From 2000 to 2020, the proportion of ecological environment improvement areas in Gonghe Basin was 66.55%, mainly distributed in the central and southeastern areas, the proportion of unchanged areas was 33.15%, and the proportion of degraded areas was 0.29%. (3) Precipitation is a key factor affecting ecological and environmental quality, and the interaction of factors has a stronger explanatory power for ecological and environmental quality. Reasonable allocation of land resources can significantly promote ecological improvement.

Key words: Gonghe Basin, remote sensing ecological index, geographical detector, ecological environment quality

CLC Number: