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United States Department of Agriculture

Agricultural Research Service

Drainage Filtration
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Rationale:
  • Hypoxic areas in Gulf of Mexico and Great Lakes linked to nutrient transport from agricultural drainage
  • Lack of current conservation practices and programs to adequately reduce transport
  • Acceptable quality water supplies for downstream reuse including ecosystem function and sustainability, drinking water supplies, and recreation

Goal:

  • Design and test the efficacy of a flow through filter system using an array of natural and synthetic by-product materials to reduce nutrient and pesticide transport from a mixed-used watershed.
 

Objective:

  • Assess the ability of some commercially available systems to filter soluble pollutants from drainage waters originating from a managed turf site

Approach:

  • Laboratory testing with flow rates equivalent to those measured in field studies and field testing on drainage pipe outlets from managed turf sites

Findings:

  • Reduction in nitrate nitrogen concentration was 4.7%, dissolved reactive phosphorus, 51.6%, chlorothalonil, 58.2%, and metalaxyl, 28.8%
  • System has been installed on tile drainage outlet at a private golf course in MN
 

Objective:

  • Design, develop, and field test effectiveness of delivery systems and identified by-product materials

Approach:

  • Field testing at a near 6 square mile mixed use watershed located within UBWC.

Progress:

  • Field site has been instrumented with access pipe and sampling equipment
  • Materials have been identified and an experimental design developed
 

 

DRAINAGE FILTRATION: DEVELOPMENT AND ASSESSMENT (PDF)

 


Last Modified: 6/9/2009
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