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Geoscience ›› 2025, Vol. 39 ›› Issue (02): 467-476.DOI: 10.19657/j.geoscience.1000-8527.2024.123

• Monitoring, Modeling and Assessment of Supergene Resources • Previous Articles     Next Articles

Spatiotemporal Dynamics and Multiscale Drivers of Agricultural Soil Erosion in the North China Plain from 1990 to 2020

LI Zhiheng1,2,3(), LIU Xiaohuang2,4(), XIA Xueqi1, XIAO Yuexin3,5, ZHANG Wenbo2,4, WANG Ran2,4, LUO Xinping2,4, XING Liyuan2,4   

  1. 1. School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
    2. Key Laboratory of Coupling Process and Effect of Natural Resources Elements,Ministry of Natural Resources, Beijing 100055, China
    3. Huangshan Observation and Research Station for Land-water Resources, Huangshan, Anhui 245000, China
    4. Command Center for Natural Resources Comprehensive Survey, China Geological Survey, Beijing 100055, China
    5. Changsha General Survey of Natural Resources Center, China Geological Survey, Changsha, Hunan 410600, China
  • Online:2025-04-10 Published:2025-05-08
  • Contact: LIU Xiaohuang

Abstract:

As China’s primary grain production base, the North China Plain’s soil erosion dynamics hold strategic significance for agricultural ecological security.This study integrates multi-source remote sensing data, digital terrain models, and climate observations to develop an erosion-driving mechanism framework using an AHP-Geodetector integrated model.Through time-series analysis (1990-2020 at 5-year intervals), key findings reveal that: (1) Erosion intensity exhibits marked spatial gradients, with non-significant erosion areas expanding annually by 1.7%, showing strong spatial concordance with alluvial fan frontal zones (Kappa=0.68); (2) Policy interventions reduced moderate-to-severe erosion by 64.3%, with differential response patterns observed across geomorphic units under conservation measures; (3) Topographic interactions demonstrate critical threshold effects, where elevation (q=0.0833) and slope (q=0.0638) synergistically amplify explanatory power by 40.1% (Δq=0.0335), delineating erosion hotspots in transitional zones (150-300 m elevation, 10°-15° slope).The results advance the “topographic energy gradient” theory, establishing the piedmont hills of central Shandong as priority areas for contour farming systems.This work provides a mechanistic foundation for spatially explicit soil conservation strategies in agro-ecosystems.

Key words: soil erosion, analytic hierarchy process, geographical detector, driving factor, North China Plain

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