ISGW use of BASINS, GenScn, WinHSPF, and WdmUtil

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ISGW use of BASINS, GenScn, WinHSPF, and WdmUtil

• Building new components based on an open
  architecture

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BASINS Version 3.0EPA Office of Water - OST

• Released this summer
• A revised modular Architecture
• GenScn as model Post-Processor
• WDMUtil as timeseries manager
• WinHSPF replacing NPSM
• New models PLOAD and SWAT
• As EPAs prime contractor for BASINS, AQUA TERRA
  is now planning versions 3.1 and 4.0.

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USGS Hydrologic ApplicationsWRD HASS and NWIS

• GenScn
• HSPEXP
• NFF, StreamStats
• AWUDS
• SWUDS
• As USGSs prime contractor for Hydrologic
  Application (Surface Water), AQUA TERRA is
  working to help define the next generation of
  application software

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Common Threads in Development Efforts

• Graphical User Interface GUI
• Production Capability (back to Batch!!!)
• Modular Component Based
• Object Oriented
• Use of Standards and Conventions
• Integrating Models and Modeling Systems
• Many Diverse Developers Involved

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Components in Our Existing Systems

• Interface Controls Text, Grid, Select Box, Date
• Map Objects LT Wrapper
• Analysis Tools Graphs, Lists, Statistics
• Timeseries Data and File
• Interprocess Communication

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Standards and Conventions

• Fortran USGS Coding Convention
• Visual Basic Windows Standards
• Help Windows HTML Help
• Data Communication XML
• Metadata - Federal Geographic Data Committee (
  FGDC-STD-001-1998)

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Super Duper Modeling SystemNOT!

• Cant get buy in from model developers and
  maintainers!
• Very expensive
• Lots of maintenance and support issues

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Alternative

• Package Models in DLLs
• Supervisor program calls models as appropriate
• A component based approach!

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Components(but at arms length)

• Aint nobody happy when a component dies and
  brings down the GUI!
• Use multiple processes to protect core system
  (GUI)
• Use interprocess communication to keep things
  coordinated

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Inter Process Approach

• Multiple Processes Running All At Once
• Model Controller
• Individual Models (HSPF, MODFLOW)
• Status Monitor
• Communication Through Pipes and Files
• Use XML Where Possible for Clarity
• Binary Files for Efficiency

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Benefits

• Efficiency
• Modularity
• Flexibility