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No increase of soil wind erosion with the establishment of center pivot irrigation system in Mu-Us sandy land.

Jie Liao1, Fei Peng2, Wenping Kang1

  • 1Drylands Salinization Research Station, Northwest Institute of Eco-Environment and Resource, Chinese Academy of Sciences, Lanzhou 730000, China.

The Science of the Total Environment
|June 1, 2024
PubMed
Summary

Center Pivot Irrigation systems (CPIs) in sandy lands did not increase wind erosion initially. However, post-harvest management is crucial to prevent future soil erosion in these newly cultivated areas.

Keywords:
Center pivot irrigationLand consolidationMu-Us sandy landSoil wind erosion

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Area of Science:

  • Environmental Science
  • Soil Science
  • Remote Sensing

Background:

  • Sandy lands in Northern China have stabilized due to ecological restoration and climate change.
  • Center Pivot Irrigation systems (CPIs) are increasingly used for arable land expansion in these areas.
  • The impact of CPIs on soil wind erosion in these newly exploited lands is largely unknown.

Purpose of the Study:

  • To analyze the temporal changes of CPIs in Mu-Us sandy land from 2000-2020.
  • To model the effect of CPIs on soil wind erosion using the Revised Wind Erosion Equation (RWEQ).
  • To assess the relationship between land policy, natural conditions, and CPI establishment.

Main Methods:

  • Utilized satellite imagery to track the expansion of CPIs over two decades.
  • Applied the Revised Wind Erosion Equation (RWEQ) to model wind erosion modules.
  • Correlated CPI distribution with land policies and geographical features.

Main Results:

  • CPI establishment began around 2010, rapidly expanding by 2015 and peaking in 2020.
  • CPIs were primarily established in areas undergoing land consolidation, aligning with policy directives.
  • Despite an overall decrease in wind erosion in the region, wind erosion within CPI areas showed an increase in 2019 under similar climatic conditions compared to 2010.

Conclusions:

  • CPI establishment in Mu-Us sandy land is significantly influenced by local policies and environmental factors.
  • While CPIs currently represent less than 1% of the total area and show no significant impact on overall wind erosion, careful post-harvest management is essential to mitigate future soil loss.