Patapsco and Back River HSPF Watershed Model Part I - Hydrology Maryland Department of the Environment.

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Presentation transcript:

Patapsco and Back River HSPF Watershed Model Part I - Hydrology Maryland Department of the Environment

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

Land use 11 Land uses simulated Land useArea (ac) Forest 83,521 Crops(5) 30,795 Pasture 11,353 Urban(Impervious and Pervious)175,977 Total301,673 Maryland Office of Planning (1997) Farm Services Agency and Agricultural Census data

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

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)

USGS Calibration Stations Gwynns Falls (1996 to 1998) Jones Falls (1996 to 1998) Patapsco (1994 to 1995)

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

Land use distribution and statistical summary

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

Land use distribution and statistical summary

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

Calibration site for MDE and CBP

Land use distribution and statistical summary