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Related Experiment Videos

Phosphorus removal in vegetated filter strips.

Majed Abu-Zreig1, Ramesh P Rudra, Hugh R Whiteley

  • 1Dep. of Biosystems Engineering, Jordan Univ. of Science and Technology, P.O. Box 3030, Irbid, Jordan. majed@just.edu.jo

Journal of Environmental Quality
|April 24, 2003
PubMed
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Vegetated filter strips effectively remove phosphorus from cropland runoff. Longer filter strips significantly improve phosphorus trapping efficiency, with length being the primary influencing factor.

Area of Science:

  • Environmental Science
  • Agricultural Engineering
  • Water Quality Management

Background:

  • Vegetated filter strips (VFS) are increasingly utilized for managing agricultural runoff.
  • VFS enhance pollutant removal through increased infiltration and reduced water turbulence.
  • Phosphorus removal from cropland runoff is a critical environmental concern.

Purpose of the Study:

  • To evaluate the effectiveness of vegetated filter strips in removing phosphorus from agricultural runoff.
  • To identify key factors influencing phosphorus trapping efficiency in VFS.

Main Methods:

  • Conducted field experiments with 20 VFS of varying lengths (2-15 m), slopes (2.3% and 5%), and vegetation cover.
  • Utilized artificial runoff with controlled phosphorus (2.37 mg L(-1)) and sediment (2700 mg L(-1)) concentrations.

Related Experiment Videos

  • Compared VFS performance against bare-soil control plots.

    • Main Results:

    • The average phosphorus trapping efficiency across all VFS was 61%, ranging from 31% (2m filter) to 89% (15m filter).
    • Filter length was the predominant factor influencing phosphorus removal; longer filters showed higher efficiency.
    • Inflow rate, vegetation type, and density had secondary effects on phosphorus removal.

    Conclusions:

    • Vegetated filter strips are effective for phosphorus removal from cropland runoff.
    • Filter length is crucial for maximizing phosphorus trapping; longer VFS are more efficient.
    • Sediment deposition, infiltration, and plant uptake are the main mechanisms for phosphorus removal in VFS.