1. Graphical Policy Analysis Tool

2. Why GPAT?
Organize and Analyze Results of Monte Carlo Simulations in RiverWare
Alternative Hydrologic Scenarios / Histories: MRM
Alternative policies
Information from Data
Statistics
Graphs
Dynamic generation
Presentations and Documents
e.g. Stakeholders meetings and EIS

3. What is GPAT? Excel Add-in written in VBA Inputs are Excel Workbooks
Download from the RiverWare web site
Inputs are Excel Workbooks
Dimensions are Slots, Time, Runs, and Policies
Variety of orientations
Outputs are Charts and Worksheets in a Workbook
Typical Chart: several statistical time series
Present directly or paste into documents

4. 2008 RiverWare User Group Meeting

6. Compare Traces
Compare traces under different policies

7. Simple Statistics Minimum Maximum Mean Std. Dev. Median Percentiles
AlternativeMethods

8. Distributions Histogram CDF One date All time Annual peak
Maximum for a given duration

9. Probability of Events Binary events Exceedance Occurrence in a range
Compound Events

10. To Access and Run GPAT Download from RiverWare download web page
Execute RiverWare in Multiple Run Management mode
One run for each Hydrologic Scenarios or Histories
EITHER Generate RDF file
Followed by separate Excelwriter run
OR Excel output directly from RiverWare
Large memory demand: Excelwriter and RiverWare
Generate an Excel workbook
One MRM run and workbook per policy
*GPAT allows alternative orientations and sources of input

11. Use GPAT Output for WR Planning and Decision-making
Plots can help stakeholders and decision makers understand future risks and opportunities under alternative options
Statistics can help identify threshold points
Data from Statistical Analysis can be used as performance measures in MCA