Delineation of water sources for public-supply wells in three fractured-bedrock aquifer systems in Massachusetts
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Graph showing observed pumping rates during aquifer testing and simulated stress periods Paxton study area 74
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20rawdown 5-layer model Altitude aquifer test Artichoke River available for recharge Avenue study area Base from U.S. bedrock bedrock aquifer bedrock surface Constant head contributing area DATUM IS SEA depth Digital Elevation Model discharge drumlin effects of pumping feet per day Figure ft/d gal/min geologic units Geological Survey Digital geophysical logs ground-water flow hydraulic properties in/yr indicated land surface leakage rates locations marine clay Massachusetts Maynard Merrimack River model area Newbury study area numerical model observed Paxton study area period piezometers pond pumping rates recharge rate reported residential responses to pumping schist SEA LEVEL shallow Simulated contributing areas Simulated drawdowns simulated heads storage coefficient stream streamflow STUDY-AREA BOUNDARY Subbasin surficial materials thick transmissive zone treet U.S. Geological Survey Universal Transverse Mercator USGS VCONT vertical conductance vertical hydraulic conductivity water levels water table Water-bearing zone water-level data water-level decline West Newbury study wetland areas Zone 19