Akademik Veri Yönetim Sistemi
Second International Conference on Salt Water Intrusion and Coastal Aquifers Modeling, Monitoring, and Management, Merida, Meksika, 30 Mart - 02 Nisan 2003, ss.78
Groundwater use in coastal areas often is limited by high concentrations of chlorides and
total dissolved solids (TDS) that may exceed maximum contaminant levels. Simulation of
groundwater use in such areas requires consideration of seawater intrusion, and optimization of
groundwater use can involve maximizing the total pumping rate subject to hydraulic, waterquality, economic, and environmental constraints. Variable density models that couple the
groundwater flow equation with the contaminant transport advection-dispersion equation can be
utilized to simulate an aquifer system in a coastal area. The response of the aquifer system to
pumping can be linked to an optimization model by means of the response matrix method, in
which influence coefficients representing the responses of hydraulic heads and TDS
concentrations to pumping are determined. In this investigation, the variable density, finitedifference numerical code SEAWAT (Guo and Langevin, 2002) was used to create a threedimensional representation of the coastal aquifer system in the Goksu Delta at Silifke, Turkey.
In the model, pumping occurs from specified municipal and agricultural wells, and aquifer
response coefficients were generated at these well locations using the groundwater model. A
linearized optimization model was constructed under steady-state conditions to maximize the
total pumpage from these wells subject to water demands and TDS and drawdown limitations.
The General Algebraic Modeling System (GAMS) code was used to execute the optimization
model, and a trade-off curve was constructed to relate the maximum pumping rate at each well to
maximum allowable TDS concentrations.