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Characterization of water quality in stratified nursery recycling irrigation reservoirs

Author

Listed:
  • Zhang, Haibo
  • Richardson, Patricia A.
  • Belayneh, Bruk E.
  • Ristvey, Andrew
  • Lea-Cox, John
  • Copes, Warren E.
  • Moorman, Gary W.
  • Hong, Chuanxue

Abstract

Recycling irrigation reservoirs (RIRs) are an emerging aquatic ecosystem of global significance. Building upon the recent discovery of thermal stratification in these novel systems and its impacts on the vertical distribution of dissolved oxygen and pH, this study investigated the dynamics of chlorophyll a (CHLA), oxidation reduction potential (ORP), electrical conductivity (EC), and turbidity in the water columns of eight RIRs in the Mid-Atlantic region in USA over a 3-year period from 2011 to 2014. The vertical distribution of CHLA was associated with thermal stratification while ORP and EC were directly affected by thermal stratification. Specifically, CHLA concentration was greatest in the middle thermocline, followed by lower hypolimnion during the stratification period. ORP level was higher at the surface than bottom with differences up to 505.67mv in Reservoir VA23. EC level was higher in the bottom than at the surface with the maximum difference of 0.90dSm−1 in Reservoir VA22. The top–bottom ORP and EC differences increased when water was stratified. Turbidity was indirectly affected by stratification. The correlation of turbidity with total precipitation was stronger during the non-stratification period from November to March than during the stratification period from April to October, mainly due to restriction on water mixing. The characterization of these additional water quality parameters in the water columns of RIRs provides fundamental knowledge about this novel water system and will help in developing sound water quality management practices for improved crop health and production while reducing agriculture's environmental footprint. This study also provides additional evidence supporting pH as a significant indicator for monitoring water quality in RIRs.

Suggested Citation

  • Zhang, Haibo & Richardson, Patricia A. & Belayneh, Bruk E. & Ristvey, Andrew & Lea-Cox, John & Copes, Warren E. & Moorman, Gary W. & Hong, Chuanxue, 2015. "Characterization of water quality in stratified nursery recycling irrigation reservoirs," Agricultural Water Management, Elsevier, vol. 160(C), pages 76-83.
    • Handle: RePEc:eee:agiwat:v:160:y:2015:i:c:p:76-83
    DOI: 10.1016/j.agwat.2015.06.027
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    References listed on IDEAS

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    1. Maayke Stomp & Jef Huisman & Floris de Jongh & Annelies J. Veraart & Daan Gerla & Machteld Rijkeboer & Bas W. Ibelings & Ute I. A. Wollenzien & Lucas J. Stal, 2004. "Adaptive divergence in pigment composition promotes phytoplankton biodiversity," Nature, Nature, vol. 432(7013), pages 104-107, November.
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    Cited by:

    1. Li, Wenchao & Guo, Shufang & Liu, Hongbin & Zhai, Limei & Wang, Hongyuan & Lei, Qiuliang, 2018. "Comprehensive environmental impacts of fertilizer application vary among different crops: Implications for the adjustment of agricultural structure aimed to reduce fertilizer use," Agricultural Water Management, Elsevier, vol. 210(C), pages 1-10.

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