Synthesis review on groundwater discharge to surface water in the Great Lakes Basin

Groundwater in the Great Lakes Basin (GLB) serves as a reservoir of approximately 4000 to 5500km3 of water and is a significant source of water to the Great Lakes. Indirect groundwater inflow from tributaries of the Great Lakes may account for 5–25% of the total water inflow to the Great Lakes and in Lake Michigan it is estimated that groundwater directly contributes 2–2.5% of the total water inflow. Despite these estimates, there is great …