40 



30 



Q. 



QJ 

 >- 



10 



Ice contact — sand and gravel, 



Outwash sand 

 over clay 



20 40 60 80 100 



Overburden Thickness (Feet) 



Figure 2-26. Relationship between bedrock well yield and thickness and 

 type of surficial overburden in the coastal zone (G.P.M. = 

 gallons per minute; Caswell 1977). 



Predominantly 

 Discharge Area 



Predominantly 

 Recharge Area 



Predominantly 

 Discharge Area 



Groundwater 

 Divide 



Groundwater Divide 



Figure 2-27.. Generalized groundwater flow in unconsolidated sediment systems. 

 (Caswell 1977) . 



2-50 



