advanced technologies
DESCRIPTION
Presented by: Katherine AnayaTRANSCRIPT
BY: KATHERINE ANAYAFOR: SWE 2013 CONFERENCE
BALTIMORE, MARYLANDOCTOBER 25 , 2013
Advanced technologies in Geographic Information System (GIS)& Global Positioning System (GPS) for
Civil Engineering Applications
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
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
Advanced Software
ArcMap GIS (Environmental Systems
Research Institute)HEC- RAS
U.S Army Corps of Engineers
Hydraulic Modeling
Used to understand hydrological processDavid Maidment describes as:
"mathematical representation of the flow of water and its components on some part of the land surface or subsurface environment."
Numerical ModelingComputer based (1d, 2d and 3d)Here we use 1D
Physical ModelingScaled down model (3d)
HEC-RAS and GIS
Complementary technologies that run more efficiently and effectively
Mapping Applications, spatial analysis and data management
Numerical Modeling: GIS
Database
Triangulated Irregular Network (TIN)
Vector-based digital geographic data Network of triangles (ft or m)
High-precision 10-15 million nodes largest size available
Aerial Image
"Science for a changing world”Georeference
Defines location, distance, size Aligned longitude and latitude Control points Pixels
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)
Walnut Creek (GIS)
Walnut Creek ( HEC-RAS)
Import GIS files into HEC-RAS Edit geometric data Enter steady flow data Set boundary conditions Manning’s n values
Cross Sections•
•Loss of energy
•Energy Grade line
•Obstructions
Import back to GIS
Using HEC-GeoRAS Velocity mapping Inundation mapping Data Storage
Import back to GIS
Exact location of project
Project Site Results
River Station: 2062.794
Reach 10ft depth
78000lb of water moving at 2 ft/s
Bank Erosion Control Measures
Rocks From calculations 1ft diameter
(3-4ft) 600 lb
Bendway Weirs Radius of curvature Height Spacing Slope of weirs
Measure 1 - Riprap
Rocks From calculations 1ft diameter
(3-4ft) - uncertainty 600 lb
Measure 2 – Bendway Weir
Bendway Weirs Radius of curvature Height Spacing Slope of weirs
GPS
Faster than traditional surveying Accurate data collection
Useful when few reference points Coasts Waterways
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
GPS and GIS
LiDAR data can infuse GPS data pointsGIS can merge both GPS and LiDAR pointsGIS creates one TIN with GPS/LiDAR pointsPerform GeoRAS process once again to
complete hydraulics
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
References
“ArcGis Resources”. http://resources.arcgis.com/en/help/main/10.1/index.html#//006000000001000000, 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.
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
Questions?