HR: 0830h
AN: H31B-0447    [PDF]
TI: Estimating Saturation with Depth in the Vadose Zone of Volcanic Ash Deposits
AU: * Gay, D
EM: dgay@wow.com
AF: University of the West Indies, St. Augustine Campus, St. Augustine, 00000 Trinidad and Tobago
AU: Reppert, P M
EM: reppert@erl.mit.edu
AF: Massachusetts Institute of Technology, Earth Resources Laboratory E34-462 42 Carleton Street, Cambridge, MA 02142 United States
AB: Surface geophysical measurements were conducted in a vast area of compacted ash deposits on the island of Dominica, West Indies. The seismic refraction data can be modeled as a power law velocity increasing with depth to the water table. Conversely, the electrical resistivity data fits a power law increasing in height from the water table. These two datasets/models are combined using basic rock physics models to predict the level of saturation from the surface to the water table. The geophysical predictions are compared to civil-engineering saturation profiles with depth.
DE: 1829 Groundwater hydrology
DE: 1866 Soil moisture
DE: 5114 Permeability and porosity
DE: 5139 Transport properties
SC: Hydrology [H]
MN: 2003 Fall Meeting