Rufus T. Getzen Arlen W. Harbaugh 1977 <p>The stream circuits of an electric analog model of the ground-water system of Long Island were modified to more accurately represent the relationahip between streamflow and ground-water levels. Assumptions for use of the revised circuits are (1) that streams are strictly gaining, and (2) that ground-water seepage into the streams is proportional to the difference between streambed elevation and the average water-table elevation near the stream. No seepage into streams occurs when ground-water levels drop below the streambed elevation. Regional simulation of the 1962-68 drought on Long Island was significantly improved by use of the revised stream circuits. </p> application/pdf 10.3133/wri7758 en U.S. Geological Survey Stream simulation in an analog model of the ground-water system on Long Island, New York reports