| Abstract: | A physical model was developed to explain threshold friction velocities u*t for particles of the size 60a??120 I?m lying on a rough surface in loose soils for semiarid and arid parts of the United States. The model corrected for the effect of momentum absorption by the nonerodible roughness. For loose or disturbed soils the most important parameter that controls u*t is the aerodynamic roughness height z 0. For physical crusts damaged by wind the size of erodible crust pieces is important along with the roughness. The presence of cyanobacteriallichen soil crusts roughens the surface, and the biological fibrous growth aggregates soil particles. Only undisturbed sandy soils and disturbed soils of all types would be expected to be erodible in normal wind storms. Therefore disturbance of soils by both cattle and humans is very important in predicting wind erosion as confirmed by our measurements. |
| Genre: | Article |
| ProdID: | 1015759 |
| Citation Author: | Marticorena, Beatrice; Bergametti, G.; Belnap, Jayne; Belnap, Jayne |
| Citation Contributing Office: | Forest and Rangeland Ecosystem Science Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 23,287 |
| Citation Issue: | D19 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 1 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | p. 23,277-23,287 |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Factors controlling threshold friction velocity in semiarid and arid areas of the United States; 1997; Article; Journal; Journal of Geophysical Research; Marticorena, Beatrice; Bergametti, G.; Belnap, Jayne; Belnap, Jayne |
| Citation Start Page: | 23,277 |
| Citation Volume: | 102 |
| Citation Year: | 1997 |
| Type: | citation/reference |
| Text: | Factors controlling threshold friction velocity in semiarid and arid areas of the United States; 1997; Article; Journal; Journal of Geophysical Research; Marticorena, Beatrice; Bergametti, G.; Belnap, Jayne; Belnap, Jayne |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1997 00:00 -0600 |
| Publisher: | |
