| Abstract: | An analysis of hourly wind speeds above and within a stand of saltcedar near Buckeye, Arizona, reveals that in 90% of all observed cases, the wind profiles above the stand can be represented by the simple logarithmic equation: uz = u* k 1n ( z z0) where uz is the velocity at height z. The roughness length (z0), (disregarding zero displacement), varies with a stability ratio similar to Richardson‘s number. The friction velocity, u*, depends on the wind speeds above the vegetation. Von Karman‘s constant, k, equals 0.41. Within the thickets there is considerable turbulence, and irregular wind inversions occur during daylight hours. The results are important for estimating water losses by evapotranspiration by either the energy-budget or the mass-transfer formulae. ?? 1970. |
| Genre: | Article |
| ProdID: | 70009841 |
| Citation Author: | Van Hylckama, T. E. A. |
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| Citation End Page: | 233 |
| Citation Issue: | C |
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| Citation Language: | English |
| Citation Larger Work Title: | Agricultural Meteorology |
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| Citation Number Of Pages: | 17 |
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| Citation Publisher: | Elsevier |
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| Citation Search Results Text: | Winds over saltcedar; 1970; Article; Journal; Agricultural Meteorology; Van Hylckama, T. E. A. |
| Citation Start Page: | 217 |
| Citation Volume: | 7 |
| Citation Year: | 1970 |
| Type: | citation/reference |
| Text: | Winds over saltcedar; 1970; Article; Journal; Agricultural Meteorology; Van Hylckama, T. E. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/0002-1571(70)90018-X |
| Date Other: | Thu, 1 Jan 1970 00:00 -0600 |
| Publisher: | Elsevier |
