Mapping Piedmont Landforms in Arizona Using ArcGIS and the Trimble GeoXT Handheld GPS Receiver
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Arid Regions Conference 2004 Presentation
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Mapping Piedmont Landforms in Arizona Using ArcGIS and the Trimble GeoXT Handheld GPS Receiver
- 1. Mapping Piedmont Landforms in Arizona Using ArcGIS and the Trimble GeoXT Handheld GPS Receiver Anthony B. Alvarado, EIT and William J. Spitz, R.G.
- 2. TASK 2.6 GEOMORPHIC EVALUATION AND LANDFORM STABILITY ASSESSMENT STUDY AREA (146 mi 2 ) Buckeye/Sun Valley Area Drainage Master Study Hassayampa River White Tank Mountains Sun Valley Parkway Wagner Wash Buckeye FRS 2 Buckeye FRS 1 Area 4 Area 3 Granite Reef Aqueduct Buckeye FRS 3 I-10 TASK 2.6 STUDY AREA
- 9. Piedmont Landform Delineation and Stability Assessment 2003 Aerial Photography, Soils, and 10-ft Topography
- 10. Piedmont Landform Delineation and Stability Assessment Surficial Geology Mapping & Landforms
- 11. Piedmont Landform Delineation and Stability Assessment Flood Hazard Mapping & Stability Assessment
- 12. Piedmont Landform Delineation and Stability Assessment 0 2 miles 0 2 miles
- 13. Piedmont Landform Delineation and Stability Assessment Track Log Data Points
- 14. Piedmont Landform Delineation and Stability Assessment The Track Log Track Log DBF Table
- 15. Existing Conditions Assessment of Primary Washes
- 16. Existing Conditions Assessment of Primary Washes Marking Waypoints and Photos
- 17. Existing Conditions Assessment of Primary Washes Surveying Cross-Sections
- 18. Existing Conditions Assessment of Primary Washes View Downstream View Upstream Primary Wash 23 – Cross Section 47 Distance (ft) Elevation (ft) View Downstream
- 19. Delineation of Erosion Hazard Setbacks
- 20. Sediment Yield Analysis Sub-Basins, NRCS Soils, Topography, Slopes, and 2003 Aerial Photography
Hinweis der Redaktion
- Purpose of this task: Quantify the extent of drainage, flooding, and erosion problems, sources, and hazards in the BSV area, and develop preliminary solutions to mitigate the identified concerns. My purpose in this presentation is to give a picture of how we used ArcGIS in combination with the use of the Trimble GeoXT Handheld and ATVs in the field to more accurately and efficiently map the BSV area.
- Key Points: size of the area, length to cover of the washes – how to do this efficiently and accurately
- Decided to use the Trimble GeoXT and use ATVs to cover more ground in less time.
- There is a lot of other mobile software out there for the Trimble and other mobile PDA like devices.
- Stage 2 analysis also used all of the above data
- Purple areas are active alluvial fans.
- Maps before field verification.
- Gaps are due to crashing the Trimble because of the large Landforms shapefile (from driving so quickly) or just losing the signal.
- This tracklog can then be used to georeference your photos so you know exactly where your photos were taken.
- 160 miles along 34 primary washes. Point out where Phoenix is and where I-10 is. Note the location of White Tanks Wash, also Wagner Wash.
- Other Key Points: Navigating to each primary wash
- Here is me with our makeshift “survey rod” with the Trimble attached using a mount.
- Example cross section
- Red Lines are the Erosion Hazard Setbacks, The Blue lines are the Floodplain, and the yellow dots are our tracklog as we verified the floodplain limits + 50ft versus the Erosion Setbacks based on the low flow banklines & flow rates.
- 3 drainage basins above the three flood retarding structures (or levees), roughly 100 sq miles in size total.