2012 Annual Report
This research project is to address Department of Defense concerns about air quality impacts both on and off their installations due to off-road military trafficking during training exercises. Tasks accomplished relate primarily to the analysis of data collected at Ft. Riley. Specifically, determining; a) aggregate size distribution (ASD) through rotary sieving the samples; b) dry aggregate stability of samples by crushing them using a soil aggregate crushing energy meter (SACEM); and c) the maximum density possible from the samples through Proctor density laboratory procedures. In addition, a new data acquisition system was developed for wind tunnel tests on soil tray obtained from Ft. Riley. The “no abrader” tests (simply blowing wind across the tray surfaces) were conducted in a laboratory wind tunnel. The “abrader” tests (sand is applied upstream in the wind tunnel, which impacts or abrades the tray surfaces) portion of the laboratory wind tunnel tests are remaining. These tests will determine the amount of loose erodible material, especially the smaller suspension size components, on the soil surface under various repeated trafficking conditions. The smaller suspension size material is directly attributable to air quality issues.
Changes in bulk density and moisture content due to military trafficking and recovery at Ft. Riley have been analyzed and reported. Likewise, the changes in vegetation during the recovery process at Ft. Riley between perennial and annual plants has also been analyzed and reported. Dates have been established for two additional military installations for trafficking experiments to be conducted.