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Updated: Mar 20, 2026
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Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
Published on: October 16, 2018
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Spatial effect analysis of ecological factors based on spatial intensity differentiation model (SIDM).
Shengwei Wang1, Mengduo Yu2, Hongquan Chen2
1School of Computer Science and Engineering, Northwest Normal University, Lanzhou, 730000, China. wangsw@nwnu.edu.cn.
Environmental Monitoring and Assessment
|March 18, 2026
Summary
This study introduces a spatial trend analysis method to monitor ecosystem changes. The Yellow River Basin showed a general increase in vegetation cover, with specific regional variations and a peak in August 2022.
Area of Science:
- Ecology
- Remote Sensing
- Geospatial Analysis
Background:
- Understanding ecosystem cyclic changes is crucial for effective monitoring and management.
- Regional variability patterns require advanced analytical methods for accurate assessment.
Purpose of the Study:
- To propose and validate a spatial trend analysis method using spatial spectral data for ecosystem change intensity.
- To analyze the spatial distribution characteristics of vegetation cover intensity changes in the Yellow River Basin.
Main Methods:
- Extraction of pixel gradient and spatial trend from multi-temporal spectral data.
- Application of the Spatial Intensity-based Dynamic Mapping (SIDM) method.
- Case study using monthly vegetation cover data for the Yellow River Basin in 2022.
Main Results:
- The SIDM method improved spatial aggregation and continuity of vegetation changes compared to original gradient distribution.
- Vegetation cover peaked in August 2022 (0.772) during the third quarter, with a yearly increase of 0.033.
- A general upward trend in vegetation cover from northwest to southeast was observed, with significant positive change areas in eastern provinces and negative changes in western regions.
Conclusions:
- The proposed spatial trend analysis method enhances the depiction of vegetation change continuity, aiding in identifying key areas for ecological monitoring and management.
- The Yellow River Basin experienced significant vegetation growth in 2022, particularly in its eastern parts.
- The findings provide crucial spatial insights for targeted ecological management strategies in the Yellow River Basin.
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