Patapsco and Back River HSPF Watershed Model

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Patapsco and Back River HSPF Watershed Model

• Part I - Hydrology
• Maryland Department of the Environment

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Hydrology

• Land Use
• Precipitation/Meteorological Data
• USGS Calibration Stations
• Hydrology Calibration

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Land use

• 11 Land uses simulated
• Land use Area (ac)
• Forest 83,521
• Crops(5) 30,795
• Pasture 11,353
• Urban(Impervious and Pervious) 175,977
• Total 301,673
• Maryland Office of Planning (1997)
• Farm Services Agency and Agricultural Census data

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Precipitation

• Baltimore Washington International Airport (BWI)
  NOAA Station 180465
• Hourly data since 1979

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Precipitation

• Advantages
• Quality of Data
• No disaggregation
• Reduces averaging of rainfall intensity
• Station located in urban section of watershed

• Disadvantages
• No spatial variability of rainfall

• Meteorological data obtained from CBP Watershed
  Model (Region V)

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USGS Calibration Stations

• Gwynns Falls (1996 to 1998)
• Jones Falls (1996 to 1998)
• Patapsco (1994 to 1995)

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Gwynns Falls Calibration

• Land use Distribution
• Daily Time Series
• Cumulative Flow Volume
• Daily Flow Frequency
• Monthly Time Series
• Seasonal Time Series
• Annual Time Series
• Summary Statistics

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Land use distribution and statistical summary
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Jones Falls Calibration

• Land use Distribution
• Daily Time Series
• Cumulative Flow Volume
• Daily Flow Frequency
• Monthly Time Series
• Seasonal Time Series
• Annual Time Series
• Summary Statistics

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Land use distribution and statistical summary
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Patapsco Calibration(compared with CBP
calibration)

• Land use Distribution
• Daily Time Series
• Cumulative Flow Volume
• Daily Flow Frequency
• Monthly Time Series
• Seasonal Time Series
• Annual Time Series
• Summary Statistics

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Calibration site for MDE and CBP
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Land use distribution and statistical summary
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