Hydrogeology of Coastal Aquifers of Southeast Massachusetts: Assessment of the impacts of the combined effects of sea-level rise and terrestrial climate change

Groundwater Model Update

We developed a homogenous density-dependent groundwater model simulating groundwater flow in bedrock and overburden sediments. As seen in the image of the cross-sections, an interface forms between the more dense ocean water (red) and the less dense freshwater (blue). Also included is an image of the modeled hydraulic head; you can see that the hydraulic head decreases moving toward the coast (east). In this aquifer system, hydraulic head can be thought of as the elevation of the water table. We are now revising the stratigraphic framework for the region using state well logs which will be incorporated in future model simulations.

Cross-sections through model showing the interface between freshwater (blue) and ocean water (red)

Cross-sections through groundwater flow model showing interface between freshwater (blue) and the ocean (red)

Boutt team model of SWI interface representing observed vs. simulated heads.

By Alexander Kirshen
January 9, 2023