Click on “Download PDF” for the PDF version or on the title for the HTML version. If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options. PHOSPHORUS LOSSES IN SURFACE RUNOFF AND SUBSURFACE DRAINAGE WATERS ON TWO AGRICULTURAL FIELDS IN QUEBECPublished by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org Citation: Paper number 701P0304, . (doi: 10.13031/2013.15722)Authors: P. Enright and C. A. Madramootoo Keywords: Phosphorus, tile-drainage, monitoring, water quality
Concentrations of phosphorus (P) above the water quality guideline of 0.03 mg L-1 are
commonly found in rivers draining agricultural lands in Quebec. This gives rise to
eutrophication, which has become quite problematic in some parts of Quebec. Agricultural nonpoint
source pollution is the dominant source of this P. While the links between P losses, surface
runoff, erosion and manure management are reasonably well understood, there is far less
information available on the movement of P via subsurface tile drainage systems. Since the
majority of intensively managed agricultural lands in Quebec are subsurface drained, this
represents a major knowledge gap. Two field sites, located in the Pike River Watershed of
Southwestern Quebec, which drains into Lake Champlain, have been instrumented to measure
and sample surface runoff and tile drainage waters. Monitoring has been ongoing since October
2000. Results are reported here for the six site-years of data.
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