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Journal of Desert Research ›› 2025, Vol. 45 ›› Issue (4): 139-152.DOI: 10.7522/j.issn.1000-694X.2025.00116

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Ecological environment quality and driving forces in the Beijing-Tianjin Sandstorm Source Control Project area

Weiguo Wang(), Huan Xie, Guoqing Feng, Shuzhen Jia   

  1. College of Geographical Sciences,Shanxi Normal University,Taiyuan 030031,Shanxi,China
  • Received:2025-05-15 Revised:2025-07-10 Online:2025-07-20 Published:2025-08-18

Abstract:

The Beijing-Tianjin Sandstorm Source Control Project area (BTSSCPA) serves as a crucial ecological barrier in northern China, which has long been subjected to ecological pressures including sandstorms, desertification, and vegetation degradation. There is an urgent need to conduct scientific assessments of the spatiotemporal evolution patterns and driving mechanisms of ecological environment quality in the BTSSCPA. This study monitored and analyzed the ecological environment quality in the BTSSCPA based on the remote sensing ecological index (RSEI). Leveraging the Google Earth Engine (GEE) platform, we constructed four indicators-heat, greenness, wetness, and dryness-using MODIS datasets to characterize the spatiotemporal patterns of ecological environment quality from 2000 to 2020. The Optimal Parameters-based Geographical Detector (OPGD) was employed to identify key influencing factors. Results were showed on the following: (1) The ecological environment quality of the BTSSCPA demonstrated a significant upward trend from 2000 to 2020. Analysis of ecological environment quality grading revealed a notable reduction in areas classified as "poor" and "relatively poor", accompanied by a simultaneous expansion of regions categorized as "moderate", "good", and "excellent". Distinct spatial heterogeneity was observed in environmental quality distribution, manifesting a clear geographical pattern: superior ecological conditions predominated in southeastern sectors, while northwestern regions exhibited comparatively inferior environmental status. (2) Different factors, classification methods (e.g., natural breaks vs. quantile) and the number of classification strata critically impacted the explanatory power of ecological environment quality assessments. (3) The influence of factors varied substantially, with annual precipitation and vegetation net primary productivity (NPP) demonstrating the most significant effects on ecological environment quality.

Key words: remote sensing ecological index, optimal parameters-based geographical detector, MODIS, Beijing-Tianjin Sandstorm Source Control Project area

CLC Number: