Estimation of dynamic load of mercury in a river with BASINS-HSPF model

  • Authors: Ouyang, Ying; Higman, John; Hatten, Jeff
  • Publication Year: 2012
  • Publication Series: Scientific Journal (JRNL)
  • Source: J Soils Sediments 12:207-216


Purpose Mercury (Hg) is a naturally occurring element and a pervasive toxic pollutant. This study investigated the dynamic loads of Hg from the Cedar-Ortega Rivers watershed into the Lower St. Johns River (LSJR), Florida, USA, using the better assessment science integrating point and nonpoint sources (BASINS)-hydrologic simulation program - FORTRAN (HSPF) model. Materials and methods The site-specific BASINS-HSPF model was developed for dynamic loads of Hg based on watershed, meteorological, and hydrological conditions. The model was calibrated and validated with existing field data. It was then applied to predict the daily and annual loads of Hg from the watershed outlet into the LSJR in response to rainfall events and water fluxes. Results and discussion In general, the predicted average daily total Hg flux during the 10-year simulation period was about 0.69 gha−1 year−1. This finding was within the range of 0.22–1.41 gha−1 year−1 reported in the Florida Everglades area. Simulations further revealed that the effects of rainfall events on Hg loading were significant, particularly in a very wet period. A maximum total Hg flux was predicted during this wet period at a rate of 122.59 gha−1 year−1. Conclusions Results from this study provide a useful case study on estimating Hg contamination in watersheds. The approaches used in this study could be transferred to estimate the dynamic loads of Hg in watersheds from other regions.

  • Citation: Ouyang, Ying; Higman, John; Hatten, Jeff 2012. Estimation of dynamic load of mercury in a river with BASINS-HSPF model. J Soils Sediments 12:207-216.
  • Keywords: BASINS, HSPF, Mercury load, Watershed modeling
  • Posted Date: April 24, 2013
  • Modified Date: April 24, 2013
  • Print Publications Are No Longer Available

    In an ongoing effort to be fiscally responsible, the Southern Research Station (SRS) will no longer produce and distribute hard copies of our publications. Many SRS publications are available at cost via the Government Printing Office (GPO). Electronic versions of publications may be downloaded, printed, and distributed.

    Publication Notes

    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
    • Our online publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS webmaster if you notice any errors which make this publication unusable.
    • To view this article, download the latest version of Adobe Acrobat Reader.