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Dust Emissions From Undisturbed And Disturbed, Crusted Playa Surfaces: Cattle Trampling Effects, Ed Frederickson, Teddy Zobeck, Robert Van Pelt, Matthew Baddock
Dust Emissions From Undisturbed And Disturbed, Crusted Playa Surfaces: Cattle Trampling Effects, Ed Frederickson, Teddy Zobeck, Robert Van Pelt, Matthew Baddock
Ed L. Frederickson
Dry playa lake beds can be significant sources of fine dust emission. This study used a portable field wind tunnel to quantify the PM10 emissions from a bare, fine-textured playa surface located in the far northern Chihuahua Desert. The natural, undisturbed crust and its subjection to two levels of animal disturbance (one and ten cow passes) were tested. The wind tunnel generated dust emissions under controlled conditions for firstly an initial blow-off of the surface, followed by two longer runs with sand added to the flow as an abrader material. Dust was measured using a GRIMM particle monitor. For the …