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Depth to Water Raster on Long Island, New York, 2013

Dates

Publication Date
Start Date
2013-04-02
End Date
2013-05-28

Citation

Como, M.D., Finkelstein, J.S., Monti, Jack, Jr., and Busciolano, Ronald, 2022, Geospatial dataset of water-table and potentiometric-surface altitudes in the upper glacial, Magothy, and Lloyd Aquifers of Long Island, New York, April-May 2013: U.S. Geological Survey data release, http://doi.org/10.5066/F7RV0KSD.

Summary

The U.S. Geological Survey (USGS) is providing an online map of a continuous depth to water surface for the upper glacial and Magothy aquifers on Long Island, New York, April-May 2013. USGS serves this map and geospatial data as a REST Open Map Service (as well as HTTP, JSON, KML, and shapefile), so end-users can use the map and data on mobile and web clients. A companion report, U.S. Geological Survey Scientific Investigations Map 3326 (Como and others, 2015; http://dx.doi.org/10.3133/sim3326) further describes data collection and map preparation and presents 68x22 in. PDF versions, 4 sheets, scale 1:125,000. The depth to water table was measured at 335 groundwater monitoring wells (observation and supply) screened [...]

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Extension: 2013_Depth_To_Water_Raster.zip
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Purpose

Each year during April and May, the USGS conducts a synoptic survey of water levels to define the spatial distribution of the water table and potentiometric surfaces within the three main water-bearing units (aquifers) underlying Long Island—the upper glacial, Magothy, and Lloyd aquifers and the hydraulically connected Jameco and North Shore aquifers. These data and the maps constructed from them are commonly used in studies of Long Island’s hydrology and are utilized by water managers and suppliers for aquifer management and planning purposes. Water-level measurements made in 502 monitoring wells (observation and supply wells) and 16 streamgage locations across Long Island during April–May 2013 were used to prepare the maps in this report. Measurements were made to the nearest hundredth of a foot using the wetted-tape method at groundwater wells and stage data at streamgaging stations were averaged for the months of April and May. Contours of water-table and potentiometric-surface altitudes were created by using the groundwater measurements. The water-table contours were interpreted using water-level data collected from 16 streamgages, 334 observation wells, and 1 supply well screened in the upper glacial aquifer or the shallow Magothy aquifer. The potentiometric-surface contours of the Magothy aquifer were interpreted from measurements at 70 observation wells and 31 supply wells screened in the middle to deep Magothy aquifer and the contiguous and hydraulically connected Jameco aquifer. The potentiometric-surface contours of the Lloyd aquifer were interpreted from measurements at 58 observation wells and 8 supply wells screened in the Lloyd aquifer and the contiguous and hydraulically connected North Shore aquifer. In SIM 3326, all water-level altitudes are referenced to the National Geodetic Vertical Datum of 1929 (NGVD 29).

Additional Information

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