Agricultural drainage ditches mitigate phosphorus loads as a function of hydrological variability

Journal of Environmental Quality
Robert KrögerCharles M Cooper

Abstract

Phosphorus (P) loading from nonpoint sources, such as agricultural landscapes, contributes to downstream aquatic ecosystem degradation. Specifically, within the Mississippi watershed, enriched runoff contributions have far-reaching consequences for coastal water eutrophication and Gulf of Mexico hypoxia. Through storm events, the P mitigation capacity of agricultural drainage ditches under no-till cotton was determined for natural and variable rainfall conditions in north Mississippi. Over 2 yr, two experimental ditches were sampled monthly for total inorganic P concentrations in baseflow and on an event-driven basis for stormflows. Phosphorus concentrations, Manning's equations with a range of roughness coefficients for changes in vegetative densities within the ditches, and discharge volumes from Natural Resources Conservation Service dimensionless hydrographs combined to determine ranges in maximum and outflow storm P loads from the farms. Baseflow regressions and percentage reductions with P concentrations illustrated that the ditches alternated between being a sink and source for dissolved inorganic P and particulate P concentrations throughout the year. Storm event loads resulted in 5.5% of the annual applied fertilizer t...Continue Reading

References

Jun 10, 2000·The Science of the Total Environment·A L Heathwaite, R M Dils
Jun 19, 2003·The Science of the Total Environment·A RäikeJ Vuorenmaa
Jul 2, 2003·Journal of Hazardous Materials·Karim Bengraïne, Taha F Marhaba
Aug 23, 2003·Journal of Environmental Quality·I C DaveredeL C Gonzini
Apr 20, 2004·Environmental Pollution·M T MooreS Smith
Aug 15, 2006·Environmental Pollution·R KrögerC M Cooper

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Citations

Jun 19, 2008·Pest Management Science·Robert Kröger, Matt T Moore
Mar 30, 2016·Bulletin of Environmental Contamination and Toxicology·Oluwayinka O IseyemiSeo-Eun Choi
Aug 7, 2009·Environmental Pollution·M T MooreC M Cooper
Sep 7, 2017·Environmental Science and Pollution Research International·Mathieu Nsenga KumwimbaMawuli Dzakpasu
Dec 8, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Derek R FaustScott A Rush
Mar 16, 2017·Bulletin of Environmental Contamination and Toxicology·Mathieu Nsenga Kumwimba, Bo Zhu
Dec 15, 2017·Bulletin of Environmental Contamination and Toxicology·Derek R FaustScott A Rush
Nov 7, 2012·Journal of Environmental Quality·Lori A Sprague, Jo Ann M Gronberg
Oct 4, 2016·Journal of Environmental Quality·L E ChristiansonK King
Apr 6, 2019·Journal of Environmental Quality·Gisel C Booman, Pedro Laterra
Mar 1, 2012·Journal of Environmental Quality·Robert KrögerElizabeth Usborne
Apr 28, 2011·Journal of Environmental Quality·Robert Kröger, Matthew T Moore
Nov 16, 2019·The Science of the Total Environment·Sushant MehanJane R Frankenberger
Apr 27, 2021·Ecological Indicators·C Emi FergusMarc H Weber

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