Use of a three-dimensional flow model to simulate the position and shape of a saltwater interface
Paquette, Shawn Michael
Bedient, Philip B.
Master of Science
Use of a standard three-dimensional flow model to simulate the saltwater interface in coastal and island aquifers as a no flow boundary is introduced. The method was used to simulate flow in a generic circular island aquifer. The results of this model compared favorably with those generated by an analytical solution and a numerical simulation. The method was used to investigate the freshwater resources of Guemes Island, Skagit County, Washington. The model showed that the northern region of the island is most vulnerable to saltwater intrusion. However, it was determined from the modeling exercise that with careful planning Guemes Island can sustain substantial development of its aquifer system without significant saltwater intrusion. The use of a standard flow model can not simulate changes in well discharge concentration but can be a valuable tool in managing groundwater development in island and coastal aquifers.
Hydrology; Environmental science; Environmental engineering