| Автор | Garbesi, Karina |
| Автор | Sextro, Richard G. |
| Автор | Robinson, Allen L. |
| Автор | Wooley, John D. |
| Автор | Owens, Jonathan A. |
| Автор | Nazaroff, William W. |
| Дата выпуска | 1996 |
| dc.description | This work investigates the dependence of soil permeability to air on sampling scale in near‐surface unsaturated soils. A new dual‐probe dynamic pressure technique was developed to measure permeability in situ over different length scales and different spatial orientations in the soil. Soils at three sites were studied using the new technique. Each soil was found to have higher horizontal than vertical permeability. Significant scale dependence of permeability was also observed at each site. Permeability increased by a factor of 20 as sampling scale increased from 0.1 to 2 m in a sand soil vegetated with dry grass, and by a factor of 15 as sampling scale increased from 0.1 to 3.5 m in a sandy loam with mature Coast Live Oak trees (Quercus agrifolia). The results indicate that standard methods of permeability assessment can grossly underestimate advective transport of gas phase contaminants through soils. |
| Формат | application.pdf |
| Копирайт | Copyright 1996 by the American Geophysical Union. |
| Тема | HYDROLOGY |
| Тема | Vadose zone |
| Тема | Instruments and techniques: modeling |
| Тема | ATMOSPHERIC PROCESSES |
| Тема | Land/atmosphere interactions |
| Тема | PHYSICAL PROPERTIES OF ROCKS |
| Тема | Permeability and porosity |
| Название | Scale Dependence of Soil Permeability to Air: Measurement Method and Field Investigation |
| Тип | article |
| DOI | 10.1029/95WR03637 |
| Electronic ISSN | 1944-7973 |
| Print ISSN | 0043-1397 |
| Журнал | Water Resources Research |
| Том | 32 |
| Первая страница | 547 |
| Последняя страница | 560 |
| Выпуск | 3 |
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