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Assessment of Long-Term Watershed Management on Reservoir Phosphorus Concentrations and Export Fluxes

Author

Listed:
  • Xiaolin Huang

    (Zhejiang Mariculture Research Institute, Wenzhou 325035, China)

  • Han Chen

    (School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, China)

  • Fang Xia

    (School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, China
    Southern Zhejiang Water Research Institute (iWATER), Wenzhou Medical University, Wenzhou 325035, China
    Key Laboratory of Watershed Environmental Science and Health of Zhejiang Province, Wenzhou 325035, China)

  • Zhenfeng Wang

    (School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, China
    Southern Zhejiang Water Research Institute (iWATER), Wenzhou Medical University, Wenzhou 325035, China
    Key Laboratory of Watershed Environmental Science and Health of Zhejiang Province, Wenzhou 325035, China)

  • Kun Mei

    (School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, China
    Southern Zhejiang Water Research Institute (iWATER), Wenzhou Medical University, Wenzhou 325035, China
    Key Laboratory of Watershed Environmental Science and Health of Zhejiang Province, Wenzhou 325035, China)

  • Xu Shang

    (School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, China
    Southern Zhejiang Water Research Institute (iWATER), Wenzhou Medical University, Wenzhou 325035, China
    Key Laboratory of Watershed Environmental Science and Health of Zhejiang Province, Wenzhou 325035, China)

  • Yuanyuan Liu

    (School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, China)

  • Randy A. Dahlgren

    (Southern Zhejiang Water Research Institute (iWATER), Wenzhou Medical University, Wenzhou 325035, China
    Key Laboratory of Watershed Environmental Science and Health of Zhejiang Province, Wenzhou 325035, China
    Department of Land, Air, and Water Resources, University of California, Davis, CA 95616, USA)

  • Minghua Zhang

    (Southern Zhejiang Water Research Institute (iWATER), Wenzhou Medical University, Wenzhou 325035, China
    Key Laboratory of Watershed Environmental Science and Health of Zhejiang Province, Wenzhou 325035, China
    Department of Land, Air, and Water Resources, University of California, Davis, CA 95616, USA)

  • Hong Huang

    (School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, China
    Southern Zhejiang Water Research Institute (iWATER), Wenzhou Medical University, Wenzhou 325035, China
    Key Laboratory of Watershed Environmental Science and Health of Zhejiang Province, Wenzhou 325035, China)

Abstract

Source water nutrient management to prevent eutrophication requires critical strategies to reduce watershed phosphorus (P) loadings. Shanxi Drinking-Water Source Area (SDWSA) in eastern China experienced severe water quality deterioration before 2010, but showed considerable improvement following application of several watershed management actions to reduce P. This paper assessed the changes in total phosphorus (TP) concentrations and fluxes at the SDWSA outlet relative to watershed anthropogenic P sources during 2005–2016. Overall anthropogenic P inputs decreased by 21.5% over the study period. Domestic sewage, livestock, and fertilizer accounted for (mean ± SD) 18.4 ± 0.6%, 30.1 ± 1.9%, and 51.5 ± 1.5% of total anthropogenic P inputs during 2005–2010, compared to 24.3 ± 2.7%, 8.8 ± 10.7%, and 66.9 ± 8.0% for the 2011–2016 period, respectively. Annual average TP concentrations in SDWSA decreased from 0.041 ± 0.019 mg/L in 2009 to 0.025 ± 0.013 mg/L in 2016, a total decrease of 38.2%. Annual P flux exported from SDWSA decreased from 0.46 ± 0.04 kg P/(ha·a) in 2010 to 0.25 ± 0.02 kg P/(ha·a) in 2016, a decrease of 44.9%. The success in reducing TP concentrations was mainly due to the development of domestic sewage/refuse collection/treatment and improved livestock management. These P management practices have prevented harmful algal blooms, providing for safe drinking water.

Suggested Citation

  • Xiaolin Huang & Han Chen & Fang Xia & Zhenfeng Wang & Kun Mei & Xu Shang & Yuanyuan Liu & Randy A. Dahlgren & Minghua Zhang & Hong Huang, 2018. "Assessment of Long-Term Watershed Management on Reservoir Phosphorus Concentrations and Export Fluxes," IJERPH, MDPI, vol. 15(10), pages 1-12, October.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:10:p:2169-:d:173469
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    References listed on IDEAS

    as
    1. Cen Meng & Yi Wang & Yuyan Li & Jiaogen Zhou & Yong Li & Jinshui Wu, 2017. "Deteriorated Water Quality of Agricultural Catchments in South China by Net Anthropogenic Phosphorus Inputs," Sustainability, MDPI, vol. 9(9), pages 1-11, August.
    2. Xiaosheng Lin & Jie Tang & Zhaoyang Li & Haiyi Li, 2016. "Finite Element Simulation of Total Nitrogen Transport in Riparian Buffer in an Agricultural Watershed," Sustainability, MDPI, vol. 8(3), pages 1-14, March.
    3. Angela Gorgoglione & Fabián A. Bombardelli & Bruno J. L. Pitton & Lorence R. Oki & Darren L. Haver & Thomas M. Young, 2018. "Role of Sediments in Insecticide Runoff from Urban Surfaces: Analysis and Modeling," IJERPH, MDPI, vol. 15(7), pages 1-15, July.
    4. Sanjeet Kumar & Ashok Mishra, 2015. "Critical Erosion Area Identification Based on Hydrological Response Unit Level for Effective Sedimentation Control in a River Basin," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(6), pages 1749-1765, April.
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    Cited by:

    1. Chunxue Yu & Xinan Yin & Zhifeng Yang & Zhi Dang, 2019. "Sustainable Water Resource Management of Regulated Rivers under Uncertain Inflow Conditions Using a Noisy Genetic Algorithm," IJERPH, MDPI, vol. 16(5), pages 1-21, March.

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