Methodology for Hydro simulation, presentation SOTM France 19 May 2016

1. Steep #3
3.1 Reporting / Decision
making with community
and partners.
3.2 Examples
Steep#1 (3 days)
1.1 Data Preparation J-3
1.2 UAV Flight
1.2 Mapping Party OSM
Data collection (picture).
Steep #2 (7 days)
2.1 Focus group
2.2 First Simulation
(slope, Elevation model
for Hydro)
Keys Words:
Focus group
Validation
Flood simulation
Keys Words:
Decising making
Community partners
Keys Words :
Data preparation
Mapping party
Human-Centered approach in
Urban area with OpenStreetMap

2. Collection of spatial data:
Admin, Road, settlement, analysis (damage assessment, flood,
etc) . Satellite image / Drone image

3. for FLOOD simulation
Orthophoto
Digital Surface Model
UAV
VALIDATION
Water level
Discharge measurement
UAV orthophoto
Land cover
Cleansing DSM
Existing
Satellite: Orthophoto, Digital Terrain Model (DTM)
GIS information: Locals, Open data platform (Open Street Map)
Hydro meteorological information: Precipitation, discharge

4. 1.1 Data Preparation
Map your environment with local the
community during a mapping party.
OPEN DATA is available
Yes
Integrate them
inside
OpenStreetMap
Database.
No

5. UAV mission. Utilization steps
UAV flight plan

6. 3D points from 2D Keypoint matches.
3D visualisation of River Digital Surface Model points cloud
High: 54
Low: 18
Elevation:
UAV Digital Surface Model (DSM)

7. Haiti, 3D visualisation of Canaan's zone. 1 meters contour lines
UAV Digital Surface Model (DSM)

8. Port Au Prince, Orthomosaic of Canaan. Rectification and fusion of Red, Green, Blue and Near infra red spectral bands. False colour visualisation
UAV Orthophoto

9. High: 42
Low: 25
High: 54
Low: 18
Haiti, university of Limonade. Digital Terrain Model (DTM) 10 cm resolution
Elevation:
Elevation:
UAV Digital Surface Model (DSM)

10. Haiti, Port au Prince. Google satellite orthophoto;
40cm pixel size resolution
UAV orthophoto; 4 cm pixel size resolution
UAV Images

11. Steep #2
2.1 Community Audit
.
- Need Assessment
- Outcomes mapping
- Focus group
- Problem /Solution

12. Steep #2
2.1 Participatory GIS
.
2 - Participatory GIS in risk reduction (Cite Soleil) with OSM platform
2.1 – Discussion with Focus group Training
2.2 – Survey with walking paper and form
2.3 – Editing JOSM
✓ Participatory mapping makes possible to
update geographic information and plan
interventions together

13. Steep #2
2.1 Survey
Canal survey in Cite Soleil for risk reduction project
.

14. Steep #2
2.1 Survey
Road assessment using OSM plateform (per section)

15. Land Use
Bridges
Storage areas
Lateral structures
Stream network
….
Manning’s coefficent
CN, Curve Number
….
Data cleansing
Hydro metereological
information
Precipitations
Discharge measurement
….
Steep #2
2.1 Data flood for simulation

16. 1st Hydraulic simulation

17. 1st Simulation
Problem!
Too many information
1st Hydraulic simulation

18. Data cleansing
Z

19. Haiti, Martisan’s basin. Land Cover
Feature Classification Feature Segmentation Feature-based image analyse

20. Haiti, Martissant zone. Hydraulic simulation showing water level extent. Below, zoom in two urban zones

21. Haiti, Martissant zone. Hydraulic simulation showing water speed and photos of field flood level

22. RAIN SEASONDRY SEASON
Haiti, Grand Goave. GIS map of hydraulic simulation showing water level during dry and rain season
X [m]
Z [m]
X [m]
Z [m]
Haiti, Grand Goave. Cross-Section plot showing water level during dry and rain season
RAIN SEASON
XZ plot Cross-Section
DRY SEASON
XZ plot Cross-Section

23. Haiti, Grand Goave. 3D visualisation of water flood extent and river-network Cross-Sections
River cross sections. XY sections visualisation overlapped on WorldView satellite image
Hec-RAS 3D visualisation of river cross section
generated each 10 m river course distances

24. Sensor:
The non-intrusive nature (not submerged) of this
solution means that it continues to function during
extreme events such as flooding. Designed as a
hydrometric information service it is a "4 in 1" data
and measurement display system (height,
velocity, discharge) making it possible to:
 create and update a rating curve using a number of
discharge estimates calculated by the software
using the images;
 obtain two discharge calculations: the discharge
estimated by the current rating curve (Q)
systematically, as well as the discharge estimated
using the surface velocity measured (Qcalc) on an
ad hoc basis;
 detect changes in hydraulic behaviour (i.e. rating
curve shift)

25. Steep #2
2.1 Community Validation

26. Steep #3
3.2 Example of community decision making
Cleaning of wastewater canals
Soley Leve, quartier by quartier
change on the ground, in Cité
Soleil. Blocks organize to improve
their own neighborhood. This
map traces their progress,,,

27. Steep #3
3.2 Example of community decision making
Cleaning of wastewater canals.
International community took credit for
this work. Local community removed the
advertising board .

28. Steep #3
3.2 Example of community decision making Recycling plastic