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Related Experiment Videos

Simulating fecal coliform bacteria loading from an urbanizing watershed.

Sangjun Im1, Kevin M Brannan, Saied Mostaghimi

  • 1Biological Systems Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA.

Journal of Environmental Science and Health. Part A, Toxic/Hazardous Substances & Environmental Engineering
|April 2, 2004
PubMed
Summary

The Hydrological Simulation Program-FORTRAN (HSPF) model reasonably simulates fecal coliform bacteria transport in urbanizing watersheds. This tool can aid in assessing land use impacts on water quality.

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Area of Science:

  • Environmental Science
  • Hydrology
  • Water Quality Modeling

Background:

  • Urbanization significantly impacts watershed hydrology and water quality.
  • Fecal coliform bacteria are key indicators of fecal contamination in water bodies.

Purpose of the Study:

  • To simulate the fate and transport of fecal coliform bacteria in the urbanizing Polecat Creek watershed.
  • To assess the utility of the Hydrological Simulation Program-FORTRAN (HSPF) as a planning tool for land use impact analysis.

Main Methods:

  • Utilized the HSPF model to simulate fecal coliform fate and transport, incorporating both point and nonpoint sources.
  • Calibrated and validated HSPF using observed hydrologic and water quality data from October 1994 to June 2000.
  • Compared simulated fecal coliform concentrations with observed data, including analysis within a 3-day window.

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Main Results:

  • HSPF demonstrated reasonable accuracy in simulating runoff volumes, with percent errors below 6.7%.
  • Simulated fecal coliform concentrations showed moderate agreement with observed data, with over 39.5% of samples falling within the predicted range.
  • The model showed slight over- and under-predictions in specific sub-watersheds.

Conclusions:

  • HSPF is a suitable tool for representing the hydrology and water quality of urbanizing watersheds.
  • The model can be effectively used for future assessments of land use impacts on in-stream fecal coliform concentrations.