1. Interactive Parallel Coordinate Visualization Tools
David E. Rosenberg
Castalletti Research Group Meeting
Milan, Italy
November 5, 2014
CAREER Grant #

2. Overview Alternative generation Visualization Interaction Demos
Next steps
Help managers find near-optimal alternatives that they prefer to the optimal solution

3. 1. Alternative Generation
Full extent of near-optimal region
Stratified sampling strategy
Won’t go into specifics
For high dimensional problems, need parallel coordinates to show!

4. 2. Parallel Coordinate Visualization

5. 3. Interaction Control rendering Generate new alternatives
View values
Highlight traces
Reorder axes & Ramp color
Generate new alternatives
With specified characteristics
Streamline process to add
Constraints
Objectives
Save/load data + settings

6. 4. Demo Phosphorus removal in Echo Reservoir, Utah

7. Problem Specifics (Alminagorta et. al, 2013) Pending TMDL in 2006
Decide BMP implementation levels (biws) to
Minimize costs
Pending TMDL in 2006
Non-point source load reduction of 8,067 kg/year
10 potential BMPs (i)
3 sources (s)
3 sub-watersheds (w)
90 decisions!!
Such that
Define phosphorus removed,
Phosphorus reduction targets achieved,
Available resources to implement BMPs,
Remove no more than the existing load, and
Non-negative variable values
(Alminagorta et. al, 2013)

8. 5. Continuing Work Lower Bear River, USA
Ecological performance criteria
Extend to non-linear problems
Solicit + test water managers’ reactions

9. Take home points New tools Find preferred near-optimal alternatives
Alternative generation
Parallel coordinate visualization
Interaction
Find preferred near-optimal alternatives
Water supply, quality, single & multi-objective applications
Many avenues for further work

10. Further Information
Code, Documentation, Model data, Examples