A precipitation runoff model for the Pomperaug River watershed, Connecticut was developed to address issues of concern including the effect of development on streamflow and groundwater recharge, and the implications of water withdrawals on streamflow. The model was parameterized using a strategy that requires a minimum of calibration and optimization by establishing basic relations between the parameter value and physical characteristics of individual hydrologic response units (HRUs) that comprise the model. The strategy was devised so that the information needed can be obtained from Geographic Information System and other general databases for Connecticut. Simulation of groundwater recharge enabled evaluation of the temporal and spatial mapping of recharge variation across the watershed and the spatial effects of changes in land cover on base flow and surface runoff.

...Water withdrawals from the Ipswich River Basin affect aquatic habitat, water quality, and recreational use of the river; describes the development, calibration and limitations of a precipitation-runoff model, and simulations made with the model to determine the effects of water use and land use patterns on streamflows; also describes the study area, the data used in the model and the methods used to obtain those data and the methods used to estimate the effects of the pumping of wells on streamflow...

... The purposes of this report are to describe (1) the hydrologic characteristics of the Quashnet River stream aquifer system and (2) the responses of the system to proposed ground water withdrawals simulated by use of a numerical model of ground water flow; these reponses to pumping are assessed in terms of drawdowns in the altitude of the water table, streamflow depletions, and sources of water to the river and the simulated supply well; in this report, the Quashnet river stream aquifer system is defined as that area extending approximately from the Mashpee River on the east to the Coonamessett River on the west and from Nantucket Sound to approximately 1 mile north of Johns Pond; this report is based on ground and surface water data collected during the study and compiled from engineers' reports and USGS ground and surface water data bases; physical characteristics of the Quashnet and Childs Rivers (streamflow, stream velocity, width and depth), surface altitude of Johns Pond, and hydraulic heads within the basin were measured from January 1990 through September 1991 ...