 |
Detailed Reference Information |
Saiers, J.E., Hornberger, G.M., Gower, D.B. and Herman, J.S. (2003). The role of moving air-water interfaces in colloid mobilization within the vadose zone. Geophysical Research Letters 30: doi: 10.1029/2003GL018418. issn: 0094-8276. |
|
The movement of colloid-sized particles through the vadose zone has important water-quality implications, yet the mechanisms that govern colloid mobilization are poorly understood. Results of our laboratory column experiments demonstrate that moving air-water interfaces associated with a downward-propagating drying front are capable of scouring kaolinite colloids from the surfaces of quartz sand. The efficiency of air-water interfaces in capturing the immobile colloids increases with increasing drying-front velocity and decreasing porewater ionic strength. A model that approximates the sand pack as a bundle of capillary tubes and that links pressure-head changes during drainage to the rates of air-water interface movement through the tubes reproduces the time-series data on effluent-kaolinite concentrations. |
|
 |
 |
BACKGROUND DATA FILES |
|
 |
Abstract |
|
 |
|
|
|
Keywords
Hydrology, Unsaturated zone, Hydrology, Soil moisture, Hydrology, Chemistry of fresh water |
|
Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
|
|
 |