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Utilization of Soil Moisture for Trafficability Studies 5 th Interagency Surface Dynamics

Utilization of Soil Moisture for Trafficability Studies 5 th Interagency Surface Dynamics. Dr. George L. Mason, PE ERDC-GSL Engineering Systems & Materials Division Mobility Systems Branch Research Engineer George.L.Mason@us.army.mil February 29, 2011. Unclassified FOUO.

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Utilization of Soil Moisture for Trafficability Studies 5 th Interagency Surface Dynamics

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  1. Utilization of Soil Moisture for Trafficability Studies5th Interagency Surface Dynamics Dr. George L. Mason, PE ERDC-GSL Engineering Systems & Materials Division Mobility Systems Branch Research Engineer George.L.Mason@us.army.mil February 29, 2011 Unclassified FOUO

  2. ERDC Mobility Research Approach Vehicle Field Testing Vehicle Terrain Interaction Modeling & Simulation Mission Level Vehicle Evaluation Unclassified FOUO

  3. Mobility in Mountain Roads of Afghanistan Unclassified FOUO

  4. Mobility in Mountain Roads of Afghanistan Attributes Derived from LIDAR Width Radius of Curvature Surface Roughness Lat 35.367 Long 71.545 Unclassified FOUO

  5. Mountain Road Analysis in Laghman 25 ft Turning Radius 11.9 foot Vehicle Width 25 ft Turning Radius 8.9 foot Vehicle Width Baseline RG31-A3 Width Unclassified FOUO

  6. Roadway Collapse A table for rapid assessment of road capacity was created from model runs . The table is considered for inclusion in safety cards and training for MTV drivers. Criteria color coding defined by ERDC SME Panel Operational roads with low risk of collapse Factor of safety between 1 and 2, increase risk of road collapse Severely restricted roads due to high risk of collapse

  7. Cross-Country Analysis Unclassified FOUO

  8. Process Diagram Soil Strength AFWA Soil Moisture GRiB Assign Soil Properties Clip Area Convert Grib to Shape + FAO Soil Type Map = Convert Volumetric Moisture To Gravimetric Moisture Compute Soil Strength Kilometers 0 5 10

  9. Cross-Country Analysis Soil Moisture Afghanistan Kabul Jalalabad Kandahar Pakistan MPH 0-2 2-5 5-15 15-30 30+ RG31-A3 Driest 30-Days RG31-A3 Wettest 30-Days Data attribution with SAR, LIDAR, and weather data emphasizes differences between vehicle performance Unclassified FOUO

  10. Reduction in Speed Performance due to Increases in Weight Jalalabad, Afghanistan + 13,500 lbs Baseline Unclassified FOUO

  11. Route Analysis for Farah, AF Comparison of vehicle performance over a given route larger 16.00R20 tires Route 1 (41.4 miles) 395/85R20 16.00R20 Unclassified FOUO

  12. Testing to Define Soft-Soil Performance a. Map showing Duckport Test Site (upper Left). b. Photo of Duckport Test Site showing approximate boundaries. Unclassified FOUO

  13. RFI requests from Theater Gap Crossing Analysis Route Evaluation GAP 1 2 3 4 5 6 7 8 9 10 11 12 13 Restricted Marginal Unrestricted

  14. Questions? Unclassified FOUO

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