GROUNDWATER HEAD MEASUREMENTS IN SOUTH-CENTRAL SUFFOLK COUNTY,

Twenty-five years of head data from a network of 133 wells and two stream gages are discussed. Maps of the water table, Upper Glacial-Magothy aquifers head differentials, and areal head fluctuations over time are presented, along with time series of water table measurements at several wells. The data show that local flow fields, generated either by models or other means, and which are based on head relations over time and space, should to be based on long-term, multi-well head data sets rather than single-well data or one-time synoptic surveys.