HR: 0800h
AN: H21E-1401    [Abstracts]
TI: Seal Formation Mechanism Beneath Animal Waste Holding Ponds
AU: * Cihan, A
EM: acihan@utk.edu
AF: Univ. of Tenn., 2506 E. J. Chapman Dr., Knoxville, TN 37996-4531
AU: Tyner, J S
EM: jtyner@utk.edu
AF: Univ. of Tenn., 2506 E. J. Chapman Dr., Knoxville, TN 37996-4531
AU: Wright, W C
EM: jtyner@utk.edu
AF: Univ. of Tenn., 2506 E. J. Chapman Dr., Knoxville, TN 37996-4531
AB: Infiltration of animal waste from holding ponds can cause contamination of groundwater. Typically, the initial flux from a pond decreases rapidly as a seal of animal waste particulates is deposited at the base of the pond. The purpose of this study was to investigate the mechanism of the seal formation. Twenty-four soil columns (10-cm diameter by 43-cm long) were hand-packed with sand, silty loam or clay soils. A 2.3 m column of dairy or swine waste was applied to the top of the each column. The leakage rate from each column was measured with respect to time to analyze the effect of seal formation on different soil textures and animal waste types. We tested our hypothesis that seal growth and the subsequent decrease of leachate production adheres to a filter cake growth model. Said model predicts that the cumulative leakage rate is proportional to the square root of time and to the square root of the height of the waste.
DE: 1829 Groundwater hydrology
DE: 1831 Groundwater quality
DE: 1838 Infiltration
DE: 1875 Vadose zone
SC: Hydrology [H]
MN: Fall Meeting 2005