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Effectiveness of vegetative filter strips in abating fecal coliform based on modified soil and water assessment tool
Bai, J.; Shen, Z. & Yan, T.
Abstract
Pathogenic bacteria are a serious public health
concern. Exposure to these microorganisms can result in
illnesses or even death. Therefore, it is important to control
pathogenic bacteria sources, transport mechanisms and
fate. Best management practices proved to be very effective
in the control of non-point source pollution. In this
study, the soil and water assessment tool (SWAT) was
modified and used to simulate the fecal coliform in Chao
River of Miyun Reservoir watershed, China. The model
was then used to explore the effectiveness of vegetative
filter strips (VFS) in reducing fecal coliform abundance
throughout the watershed. The water temperature equation
within the SWAT was modified to align the model more
closely with the characteristics of the study area and generate
a more accurate simulation. The DAFSratio (20, 50,
80, 120 and 150) and DFcon (0.25, 0.4, 0.6 and 0.75)
parameters were considered for VFS to see their effects on
removal efficiency. The results show that calibration and
validation results for fecal coliform and flow can be
accepted. Different values for DAFSratio and DFcon have
great influence on VFS. Increasing values resulted in a
decrease in the removal efficiency of VFS.
Keywords
Hydrologic model; Miyun Reservoir watershed; Water quality; Watershed management
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