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Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations
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Published on: September 11, 2016

Soil erosion dynamics response to landscape pattern.

Wei Ouyang1, Andrew K Skidmore, Fanghua Hao

  • 1School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing, China. wei@itc.nl

The Science of the Total Environment
|November 20, 2009
PubMed
Summary
This summary is machine-generated.

Temporal land use changes significantly impact soil erosion. Increased bare land, water, and farmland exacerbated erosion, while grassland patches offered protection, guiding conservation efforts in the Yellow River watershed.

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Area of Science:

  • Environmental Science
  • Hydrology
  • Remote Sensing

Background:

  • Soil erosion is a critical environmental issue, particularly in large river basins like the Yellow River.
  • Understanding the long-term impacts of land use change on soil erosion is essential for effective conservation strategies.

Purpose of the Study:

  • To simulate and assess soil erosion variation over three decades (1977-2006) in the upper Yellow River watershed.
  • To evaluate the influence of land use dynamics and landscape patterns on soil erosion load.

Main Methods:

  • Utilized a multi-year land use database derived from supervised classification of Landsat imagery.
  • Employed the Soil Water Assessment Tool (SWAT) model, integrating soil, climate, and elevation data.
  • Applied a numerical statistical model to correlate land use, landscape characteristics, and soil erosion with water flow and sand density data.

Main Results:

  • A decadal decrease in grassland did not significantly increase soil erosion.
  • Increases in bare land, water bodies, and farmland were correlated with higher soil erosion rates.
  • Landscape analysis revealed that larger water areas increased erosion, while contagious grassland patches reduced it, though increased grassland patches also increased sediment transport from edges.

Conclusions:

  • Land use changes, particularly the expansion of bare land, water, and farmland, are key drivers of increased soil erosion in the region.
  • Grassland plays a protective role, but landscape configuration (e.g., patchiness, edges) also influences erosion dynamics.
  • Findings provide a basis for targeted soil erosion conservation and pollution prevention strategies informed by temporal landscape variations.