1. GIS Application to Investigate Soil Condition Effect on Pavement Performance Lu Gao CE 394K.3 GIS in Water Resources Dr. Maidment

2. Outline Background GIS Application Conclusion

3. Background Database PMIS (Pavement Management Information System) --- TxDot SSURGO (Soil Survey Geographic) --- National Resources Conservation Service

4. Background Variables Pavement Performance Indicator: Distress Scores, Condition Scores, Ride Scores --- PMIS Drainage Class, HEL (Highly Erodible Lands classification) --- SSURGO

5. Background Distress Scores describe the amount of distress on the pavement surface. Condition Scores describes the average person’s opinion of a pavement condition. Ride Scores describes the roughness of a pavement’s surface.

6. Background Distress Scores range from 1 (very poor) to 100 (very good) Condition Scores range from 1 (very poor) to 100 (very good) Ride Scores range from 0.1 (very rough) to 5.0 (very smooth)

7. Background Objective SSURGO PMIS ARCGIS Effect Distress Scores Condition Scores Ride Scores Drainage Class HEL

8. GIS Application Dallas County

9. GIS Application Step 1 Create Layers from PMIS --- Distress Scores

10. GIS Application Step 1 Create Layers from PMIS --- Condition Scores

11. GIS Application Step 1 Create Layers from PMIS --- Ride Scores

12. GIS Application Step 2 Create Layers from SSURGO --- Drainage Class

13. GIS Application Step 2 Create Layers from SSURGO --- HEL (Highly Erodible Lands Classification)

14. GIS Application Step 3: Create New Layers using Selection by Location

15. GIS Application

16. Step 4: Calculation Calculate the mean of the pavement performance indicators in different soil condition lands. Calculate Flexible and Rigid Pavement respectively

17. Conclusion The Effect of Erodible Land Classification to Pavement Performance is NOT clear

18. Conclusion There is CLEAR effect of Drainage Lands to Pavement Performance.

19. Conclusion There is CLEAR effect of Drainage Lands to Pavement Performance.

20. Conclusion There is CLEAR effect of Drainage Lands to Pavement Performance.

21. Conclusion Drainage ability of soil can effect the Pavement Performance significantly. When soil drainage ability is poor, there is NOT big difference between Flexible and Rigid pavement. When soil drainage ability is well, Flexible pavement always has BETTER performance.

22. Question Thanks a lot!