The document discusses using free and open source software (FOSS) to delineate flood plains. It presents the Storm Water Management Model (SWMM) as a recognized dynamic rainfall-runoff simulation model in the public domain. It aims to integrate SWMM with FOSS for geospatial (FOSS4G) by developing inp.PINS to take advantage of GIS functions and better characterize models. A case study applies the methodology to the Ribeira das Hortas catchment in Portugal. The document concludes FOSS offers reduced costs, tools adapted to user needs, and standards for interoperability.

1. FLOOD PLAIN DELINEATION
WITH FREE AND OPEN SOURCE
SOFTWARE
Rui D. PINA
ruidpina@gmail.com
Prof. Alfeu Sá Marques
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

2. WHAT IS FREE AND OPEN SOURCE SOFTWARE (FOSS)?
Users' freedom: run, copy, distribute, study, change and improve the software.
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

3. WHAT IS FOSS?
“It is a gift culture, where the basics are
taken care of and social status is gained
by giving things away, rather than
accumulating.” (Harvey and Han, 2002)
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

4. FOSS4G
http://www.osgeo.org/
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

5. STORM WATER MANAGEMENT MODEL
Public Domain project with:
•Recognized dynamic rainfall-
runoff simulation model
•Fast development achieved
•Great amount of testers
•Care of social issues
http://www.epa.gov/ednnrmrl/models/swmm/
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

6. GOAL
FOSS4G SWMM
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

7. inp.PINS
Aims of integration
GIS & SWMM:
• Take advantage on GIS
complex functions available
• Better characterize the model
and analyze modelling results
• Data archive, access and
manipulation
• Visualization
http://www.mapwindow.org/
https://sites.google.com/site/inppins/
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

8. CASE STUDY – RIBEIRA DAS HORTAS
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

9. RIBEIRA DAS HORTAS CATCHMENT
Area 13.96 km2
Perimeter 25.5km
Maximum Elevation 348 m
Minimum Elevation 122 m
Average slope 5.7%
% impervious area 40%
Time of concentration (Kirpich) 110 min
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

10. METHODOLOGY
• GIS LINKED WITH SWMM:
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

11. Hy
dro
Flow coefficients
Floodplains Depression storage
lo g
Infiltration parameters
MM
ica
(Horton method)
lc
ha
SW
rac
ter
i
za
ti on
Physical characterization
Area, Length, Width, Slope, %IMP, XS
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

12. GIS EXAMPLES
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

13. inp.PINS
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

14. inp.PINS
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

15. FLOODPLAINS
Directive 2007/60/EC
“(18) Member States should base
their assessments, maps and plans
on appropriate ‘best practice’ and
‘best available technologies’ not
entailing excessive costs in the
field of flood risk management.”
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

16. inp.PINS with 6 months worldwilde
https://sites.google.com/site/inppins/
> 300 downloads from http://www.mapwindow.org/
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com

17. CONCLUSIONS
• inp.PINS – interoperability between GIS & SWMM
• FOSS advantages:
– Reduced costs
– Tools adapted to users' needs
– Standards: interoperability
• FUTURE WORK: EPANET
• LIMITATIONS:
– Dependent on EPA software developments
DEC-FCTUC, April 2011 Rui Pina - ruidpina@gmail.com