MODFLOW 6 Models Used to Simulate Groundwater Flow and Nitrogen Transport in the Long Island Sound Watershed on Long Island, New York (ver. 2.0, January 2026)
This groundwater model archive documents coupled transient and steady-state regional and inset numerical models of the Long Island aquifer system to simulate groundwater flow and nitrogen transport using the US Geological Survey groundwater modeling software MODFLOW 6 (Langvin and others, 2017 and 2022). The regional model domain encompasses all of Long Island, New York, while the inset model domain encompasses the Long Island Sound watershed on Long Island, New York. The development and calibration of the regional groundwater flow model is documented in Walter and others (2024). The development of regional groundwater nitrogen transport models and coupled regional-inset groundwater flow and nitrogen transport models are documented in Jahn and Walter (2025). Model input and output files included in this data release are documented in the readme.txt.
First posted September 2025, ver 1.0
Revised January 2026, ver 2.0
Version 1.0:
In this version of the dataset, the MF2 recharge input file
(historic_lgr/child-flow.rcha) points to a single average 2010-2019
recharge array for each of the 10 stress periods rather than the 10 unique
arrays representing annual average recharge rates for each year from 2010-2019.
Version 2.0:
This version of the dataset has been updated to the correct stress period
recharge file paths. Corresponding model output and postprocessed files have
been updated.
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Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[ "010:12" ] |
| contactPoint |
{ "fn": "Kalle L. Jahn", "@type": "vcard:Contact", "hasEmail": "mailto:kjahn@usgs.gov" } |
| description | This groundwater model archive documents coupled transient and steady-state regional and inset numerical models of the Long Island aquifer system to simulate groundwater flow and nitrogen transport using the US Geological Survey groundwater modeling software MODFLOW 6 (Langvin and others, 2017 and 2022). The regional model domain encompasses all of Long Island, New York, while the inset model domain encompasses the Long Island Sound watershed on Long Island, New York. The development and calibration of the regional groundwater flow model is documented in Walter and others (2024). The development of regional groundwater nitrogen transport models and coupled regional-inset groundwater flow and nitrogen transport models are documented in Jahn and Walter (2025). Model input and output files included in this data release are documented in the readme.txt. First posted September 2025, ver 1.0 Revised January 2026, ver 2.0 Version 1.0: In this version of the dataset, the MF2 recharge input file (historic_lgr/child-flow.rcha) points to a single average 2010-2019 recharge array for each of the 10 stress periods rather than the 10 unique arrays representing annual average recharge rates for each year from 2010-2019. Version 2.0: This version of the dataset has been updated to the correct stress period recharge file paths. Corresponding model output and postprocessed files have been updated. |
| distribution |
[ { "@type": "dcat:Distribution", "title": "Digital Data", "format": "XML", "accessURL": "https://doi.org/10.5066/P1EA64FC", "mediaType": "application/http", "description": "Landing page for access to the data" }, { "@type": "dcat:Distribution", "title": "Original Metadata", "format": "XML", "mediaType": "text/xml", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.6825e5c9d4be02062b8d5182.xml" } ] |
| identifier | http://datainventory.doi.gov/id/dataset/USGS_6825e5c9d4be02062b8d5182 |
| keyword |
[ "Long Island", "MODFLOW 6", "MODPATH 7", "Nassau County", "New York", "Queens County", "Suffolk County", "USGS:6825e5c9d4be02062b8d5182", "environment", "geoscientificInformation", "groundwater", "inlandWaters", "model", "modflow6", "nitrogen", "usgsgroundwatermodel" ] |
| modified | 2026-08-20T00:00:00Z |
| publisher |
{ "name": "U.S. Geological Survey", "@type": "org:Organization" } |
| spatial | -74.0665, 40.3862, -71.7916, 41.2270 |
| theme |
[ "geospatial" ] |
| title | MODFLOW 6 Models Used to Simulate Groundwater Flow and Nitrogen Transport in the Long Island Sound Watershed on Long Island, New York (ver. 2.0, January 2026) |
