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Seasonal water quality changes in on-farm water storage systems in a south-central U.S. agricultural watershed

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  • Pérez-Gutiérrez, Juan D.
  • Paz, Joel O.
  • Tagert, Mary Love M.

Abstract

The objective of this study was to investigate the ability of on-farm water storage (OFWS) systems to mitigate off-site nutrient movement in a south-central U.S. agricultural watershed. We examined the seasonal water quality changes in an OFWS system by measuring several physical and chemical constituents at multiple sampling points throughout the system. Water quality sampling occurred every three weeks during the growing season and every six weeks during the dormant season from February 2012 to December 2014. The collected data were grouped into four seasons and then analyzed using boxplots along with the Wilcoxon and Kruskal-Wallis rank-sum tests for detecting changes in nutrient concentrations. Significant water quality changes were observed in the OFWS system by season and nutrient species, indicating a variation in downstream nutrient reduction with season. The in-ditch median removal efficiency, from the center of the tailwater recovery ditch to the outlet, was 54% during winter and 50% during spring for NO3-N; 60% during spring for NH3-N; 26% during autumn and 65% during winter for ortho-P; and 31% during winter and 10% during spring for TP. The in-pond median concentration removal efficiency was ∼77% during summer for NO3-N, while the concentration remained stable during winter, spring and autumn; 53% from winter to spring and 58% from spring to summer for NH3-N; 70% from winter to spring for ortho-P, while remaining stable during the other seasons; and 28% from winter to spring and 55% from spring to summer for TP. Our results support the hypothesis that OFWS systems could mitigate downstream nutrient-enrichment pollution, especially during spring. The results obtained from this study offer a better insight into the behavior of OFWS systems and help enhance the management of agroecosystems from an ecological and hydrological perspective for water quality pollution control and water resource conservation.

Suggested Citation

  • Pérez-Gutiérrez, Juan D. & Paz, Joel O. & Tagert, Mary Love M., 2017. "Seasonal water quality changes in on-farm water storage systems in a south-central U.S. agricultural watershed," Agricultural Water Management, Elsevier, vol. 187(C), pages 131-139.
    • Handle: RePEc:eee:agiwat:v:187:y:2017:i:c:p:131-139
    DOI: 10.1016/j.agwat.2017.03.014
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    References listed on IDEAS

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    1. Hollinger, E. & Cornish, P. S. & Baginska, B. & Mann, R. & Kuczera, G., 2001. "Farm-scale stormwater losses of sediment and nutrients from a market garden near Sydney, Australia," Agricultural Water Management, Elsevier, vol. 47(3), pages 227-241, April.
    2. Littlejohn, K.A. & Poganski, B.H. & Kröger, R. & Ramirez-Avila, J.J., 2014. "Effectiveness of low-grade weirs for nutrient removal in an agricultural landscape in the Lower Mississippi Alluvial Valley," Agricultural Water Management, Elsevier, vol. 131(C), pages 79-86.
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    Cited by:

    1. Pérez-Gutiérrez, Juan D. & Paz, Joel O. & Tagert, Mary Love M. & Sepehrifar, Mohammad, 2020. "Impact of rainfall characteristics on the NO3 – N concentration in a tailwater recovery ditch," Agricultural Water Management, Elsevier, vol. 233(C).

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