Water availability and quality from the stratified drift in Anguilla Brook basin, Stonington and North Stonington, Connecticut
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Abstract
The valley of Anguilla Brook is underlain by saturated stratified-drift deposits that, where thick and transmissive, have the potential to yield large quantities of ground water. These deposits are collectively termed the Anguilla Brook aquifer. Long-term yields of four subareas within this aquifer are estimated to range from less than 0.3 to 1.0 million gallons per day. The total yield of all four subareas is estimated to be 2.6 million gallons per day. These yield estimates are based on using the 90-percent duration flow of Anguilla Brook as an index of the water potentially available and on maximum sustainable pumping rates calculated by a mathematical model that used the Theis nonequilibrium equation and image well theory. Development of one or more subareas assumes that most ground water would be derived from induced recharge. This would reduce the flow of Anguilla Brook, and the effect will be most significant during periods when streamflow is low.
Limited sampling and analysis indicate that the quality of both surface and ground water in the Anguilla Brook basin is excellent. The concentrations of all constituents analyzed, with the exception of dissolved manganese and iron, were below the drinking-water limits established by the State of Connecticut, or recommended by the U.S. Environmental Protection Agency.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Water availability and quality from the stratified drift in Anguilla Brook basin, Stonington and North Stonington, Connecticut |
| Series title | Water-Resources Investigations Report |
| Series number | 85-4276 |
| DOI | 10.3133/wri854276 |
| Year Published | 1991 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | Report: vii, 49 p.; 1 Plate: 19.81 x 23.75 inches |
| Country | United Stated |
| State | Connecticut |
| City | Stonington |
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