Wet Pond Modeling for Contaminant Retention and Maintenance

Details

• Creators:
  Herb, William ; Natarajan, Poornima ; Janke, Benjamin D. ; Gulliver, John S. ; Finlay, Jacques C.
• Corporate Creators:
  University of Minnesota, Minneapolis. St. Anthony Falls Laboratory ; Local Road Research Board
• Corporate Contributors:
  Minnesota. Department of Transportation. Office of Research & Innovation
• Subject/TRT Terms:
  Computer Models Contaminants Phosphorus Ponding Runoff Water Quality Management
• Publication/ Report Number:
  MN 2026-18
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Minnesota
• Edition:
  Final Report
• Corporate Publisher:
  Minnesota. Department of Transportation. Office of Research & Innovation
• Abstract:
  We have found that many ponds are stratified at 0.3m (1ft) depth, often resulting in a bottom region of low dissolved oxygen water and thereby causing the pond to release phosphorus trapped in the bottom sediments back into the water column. It is critical to maintain treatment capacity to reduce pollution to downstream priority waters. This research investigates maintenance approaches to mitigate phosphorus pollution from ponds. The main objectives and tasks of the project are to collect field measurements and perform data analysis to verify a pond model, MinPond, and model pond management methods that can reduce phosphorus export for six ponds. The major conclusions are: an intense street sweeping regime is the most cost-effective means of reducing phosphorus export from a stormwater pond or historic wetland that serves as a stormwater practice by decreasing the load coming from the watershed; chemical treatment of the sediments is another effective means of reducing phosphorus export but only when the phosphorus release from the sediments is substantial; and Bubble aeration that is successful in destratifying the water column can bring oxygen down to the sediments and reduce a high phosphorus release from the sediments.
• Format:
  PDF
• Funding:
  (c) 1036342 (wo) 81
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:a3d71d72c2c0d01e4aea5c457d1867010e1cfb160e0b863d0b8a1ccda5473414fa5a546b5724dbd2be489cf4f7bc0abfb4ddbd130dbeda5ccef55300d25bd629
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/92416/dot_92416_DS1.pdf
• File Type:
  [PDF - 10.04 MB ]