HR: 1340h
AN: H23G-1704    [Abstracts]
TI: Modeling Variable-density Groundwater Flow in Coastal Aquifer: Submarine Groundwater Discharge (SGD), Tides Influence and Near-shore Circulation
AU: * Li, X
EM: xinyali@gly.fsu.edu
AF: Xinya Li, Department of Geological Sciences, Florida State University, Tallahassee, FL 32306, United States
AU: Hu, B X
EM: hu@gly.fsu.edu
AF: Xinya Li, Department of Geological Sciences, Florida State University, Tallahassee, FL 32306, United States
AU: Burnett, W C
EM: wburnett@mailer.fsu.edu
AF: William C. Burnett, Department of Oceanography, Florida State University, Tallahassee, FL 32306, United States
AB: Two-dimensional variable density simulations are performed for a coastal area of the northeastern Gulf of Mexico by applying finite difference model SEAWAT2000. For modeling, piezometers are installed along the coastline perpendicularly and sensors in particular piezometers keep providing hydraulic head and salinity observations by every 10 minutes in company with the changes of sea level. The influence of oscillations of dispersive mixing freshwater-saltwater interface is discussed to the estimation of SGD in the aquifer and through the sea floor. Due to insufficient information of coastal aquifer, several trial models were set first to investigate the influence of heterogeneity. Modeling investigations are also made to research the suggested mechanisms of SGD, such as tidal pumping, near-shore circulation or seasonal exchange and the phenomena related to them. Meanwhile, under three periods: stable sea-level, regular tides and storm, uncertainties of the transient models are analyzed.
DE: 1829 Groundwater hydrology
DE: 1847 Modeling
DE: 4255 Numerical modeling (0545, 0560)
SC: Hydrology [H]
MN: 2007 Fall Meeting