Presented by: Katherine Anaya

1. B Y : K A T H E R I N E A N A Y A
F O R : S W E 2 0 1 3 C O N F E R E N C E
B A L T I M O R E , M A R Y L A N D
O C T O B E R 2 5 , 2 0 1 3
Advanced technologies
in Geographic Information System (GIS)
& Global Positioning System (GPS) for
Civil Engineering Applications

2. Objectives
 To demonstrate the usage of both GIS and GPS for
Civil Engineering Applications
 Project consist of channel bank stabilization measures
 2 Conceptual Designs Measures

3. About the Presenter
 Born and raised in Los Angeles, CA, Parents both
from Guerrero, Mexico
 Civil Engineering student at East Los Angeles
Community College since 2012
 Career Goals
 B.S Civil Engineering
 M.S Structural Engineering
 PhD Water Resources
 Follow my fathers footsteps and have my own company one
day

4. Advanced Software
 ArcMap GIS
 (Environmental Systems
Research Institute)
 HEC- RAS
 U.S Army Corps of Engineers

5. Hydraulic Modeling
 Used to understand hydrological process
 David Maidment describes as:
"mathematical representation of the flow of water and its
components on some part of the land surface or subsurface
environment."
 Numerical Modeling
Computer based (1d, 2d and 3d)
Here we use 1D
 Physical Modeling
Scaled down model (3d)

6. HEC-RAS and GIS
 Complementary technologies that run more
efficiently and effectively
 Mapping Applications, spatial analysis and data
management
 Numerical
Modeling: GIS
Database

7. Triangulated Irregular Network (TIN)
 Vector-based digital geographic data
 Network of triangles
 (ft or m)
 High-precision
 10-15 million nodes largest size available

8. Aerial Image
 "Science for a changing world”
 Georeference
 Defines location, distance, size
 Aligned longitude and latitude
 Control points
 Pixels

9. Project Site: San Dimas, CA
Walnut Creek
 Before winter
 Water released; for
greater holding capacity
 Puddingstone
Reservoir
 Average release: 11-16
m3/s
 Maximum release: 22m3/s
(777ft3/s)

10. Walnut Creek (GIS)

11. Walnut Creek ( HEC-RAS)
 Import GIS files into HEC-RAS
 Edit geometric data
 Enter steady flow data
 Set boundary conditions
 Manning’s n values

12. Cross Sections
•
•Loss of energy
•Energy Grade line
•Obstructions

13. Import back to GIS
 Using HEC-GeoRAS
 Velocity mapping
 Inundation mapping
 Data Storage

14. Import back to GIS
Exact
location
of project

15. Project Site Results
 River Station:
2062.794
 Reach 10ft depth
 78000lb of water
moving at 2 ft/s

16. Bank Erosion Control Measures
 Rocks
 From calculations 1ft diameter
 (3-4ft)
 600 lb
 Bendway Weirs
 Radius of curvature
 Height
 Spacing
 Slope of weirs

17. Measure 1 - Riprap
 Rocks
 From calculations 1ft diameter
 (3-4ft) - uncertainty
 600 lb

18. Measure 2 – Bendway Weir
 Bendway Weirs
 Radius of curvature
 Height
 Spacing
 Slope of weirs

19. GPS
 Faster than traditional
surveying
 Accurate data collection
 Useful when few reference
points
 Coasts
 Waterways

20. Global Positioning System (GPS)
 In the survey world, is used to determine three
variables: X, Y and Z using REAL TIME
KINEMATICS (corrects in real time)
 X and Y in our case are projected coordinates and
use California State Plane, Zone V (we measure along
a 2D plane not the earth’s surface)
 Z is with respect to NAVD 1988

21. GPS and GIS
 LiDAR data can infuse GPS data points
 GIS can merge both GPS and LiDAR points
 GIS creates one TIN with GPS/LiDAR points
 Perform GeoRAS process once again to complete
hydraulics

22. GPS Limitations
 Multipath:
 points collected at site
(river) are lagged by
tree canopy
 GPS units
 used on site are not
being corrected in
REAL TIME, use non
RTK units
 GPS points
 can be more than 30 ft
( 9 m) off from
location taken

23. References
 “ArcGis Resources”.
http://resources.arcgis.com/en/help/main/10.1/index.html#//00600
0000001000000, 26 July 2013. Web. 10 Feb. 2012.
 Almaraz Javier. “Walnut creek Bank Stabilization and Velocity
Regression concept design.”18 Aug. 2010: 1-3. Print
 Julien, P.Y, & Duncan, J. R (2003). “Optimal Design Criteria of
Bendway Weirs from Numerical Simulations and Physical Model
Studies”. Colorado: Colorado State University Civil Engineering.
 Solek, W. Christopher, “Ecology of the San Gabriel River Catchment:
Anthropogenic Influences on Black Flies and other Benthic Macro
invertebrates. "California: University of California Berkeley
Environmental Science. 2008.

24. Appreciation
 Engineering & Technologies (E&T) Department for the Equipment and
Software Usage
 Faculty and Staff at ELAC’s E&T Dept.
 Dr. Humberto Gallegos
 Women Engineers (WE) Club and Engineering Club s at ELAC for fund
raising activities
 Parents Support
 Brother for traveling with me

25. Questions?