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Modeling nutrient pollution during a first flood event using HSPF software: Iskar River case study, Bulgaria

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  • Ribarova, Irina
  • Ninov, Plamen
  • Cooper, David

Abstract

The nitrogen and phosphorus concentrations in the Iskar River, Bulgaria, during a first flood event have been modeled. The term “first flood event” refers to the response to the first rainfall event after a long dry period which has a major impact on river nutrient loads. The HSPF model had been calibrated with data for 2 years (2000–2001) and verified using data for a further year for a sub-catchment of the Iskar River (from the source to Iskar reservoir). In order to test the ability of HSPF to describe nutrient pollution during a flood event, the calibrated daily time step model was run for such an event with two time steps—daily and hourly. The results of the hydrologic simulation gave a difference in water balance for the period of less than 5%. Percentage differences between observed and simulated values for the nitrogen load were calculated as 13.1% and 18% for hourly and daily simulations, respectively. Percentage differences between phosphorus measured and simulated loads were larger at 16.6% and 34.4%. The simulations performed here suggest further application of the HSPF model may be valuable in providing a better understanding and in forecasting nutrient concentrations during first flood events.

Suggested Citation

  • Ribarova, Irina & Ninov, Plamen & Cooper, David, 2008. "Modeling nutrient pollution during a first flood event using HSPF software: Iskar River case study, Bulgaria," Ecological Modelling, Elsevier, vol. 211(1), pages 241-246.
    • Handle: RePEc:eee:ecomod:v:211:y:2008:i:1:p:241-246
    DOI: 10.1016/j.ecolmodel.2007.09.022
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    Cited by:

    1. Xiaoyan Bai & Wen Shen & Peng Wang & Xiaohong Chen & Yanhu He, 2020. "Response of Non-point Source Pollution Loads to Land Use Change under Different Precipitation Scenarios from a Future Perspective," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 34(13), pages 3987-4002, October.
    2. Shen, Zhenyao & Hong, Qian & Chu, Zheng & Gong, Yongwei, 2011. "A framework for priority non-point source area identification and load estimation integrated with APPI and PLOAD model in Fujiang Watershed, China," Agricultural Water Management, Elsevier, vol. 98(6), pages 977-989, April.
    3. Y. Yang & L. Wang, 2010. "A Review of Modelling Tools for Implementation of the EU Water Framework Directive in Handling Diffuse Water Pollution," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 24(9), pages 1819-1843, July.
    4. Hou, Xiaoning & Xu, Zan & Tang, Caihong & Zhang, Shanghong, 2021. "Spatial distributions of nitrogen and phosphorus losses in a basin and responses to best management practices — Jialing River Basin case study," Agricultural Water Management, Elsevier, vol. 255(C).
    5. Zhaofu Li & Chuan Luo & Kaixia Jiang & Rongrong Wan & Hengpeng Li, 2017. "Comprehensive Performance Evaluation for Hydrological and Nutrients Simulation Using the Hydrological Simulation Program–Fortran in a Mesoscale Monsoon Watershed, China," IJERPH, MDPI, vol. 14(12), pages 1-18, December.
    6. Jiawei Li & Junyou Liu, 2022. "Predicting Freshwater Microbial Pollution Using a Spatial Model: Transferability between Catchments," Sustainability, MDPI, vol. 14(20), pages 1-14, October.

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