MODFLOW 6 Model Scenario used to Simulate Transient Stresses, Heads, and Flows in the Regional Aquifer System of Long Island, New York, 2005-2019

Dates

Publication Date: 2024-02-14
Start Date: 2005-01-01
End Date: 2019-12-31

Citation

Misut, P.E., Walter, D.A., and Schubert, C.E., 2024, MODFLOW 6 model scenario used to simulate transient stresses, heads, and flows in the Regional Aquifer System of Long Island, New York, 2005-2019: U.S. Geological Survey data release, https://doi.org/10.5066/P907ORL5.

Summary

This data release contains the input, output, and model code used to run a transient simulation of a previously published (Walter and others, 2020) steady-state regional model of Long Island, N.Y. The original model code was updated to MODFLOW 6 (version 6.3.0) and incorporates monthly transient stress periods to simulate conditions from 2005-2019 following methods described in Walter and others (2020). Selected remedial stresses (groundwater extraction and return) were incorporated for select locations in southeastern Nassau County. No modifications were made to the hydrologic boundaries, model layers, or hydraulic properties specified in the original model. A uniform value of 0.25 was used to represent specific yield (unconfined [...]

Summary

This data release contains the input, output, and model code used to run a transient simulation of a previously published (Walter and others, 2020) steady-state regional model of Long Island, N.Y. The original model code was updated to MODFLOW 6 (version 6.3.0) and incorporates monthly transient stress periods to simulate conditions from 2005-2019 following methods described in Walter and others (2020). Selected remedial stresses (groundwater extraction and return) were incorporated for select locations in southeastern Nassau County. No modifications were made to the hydrologic boundaries, model layers, or hydraulic properties specified in the original model. A uniform value of 0.25 was used to represent specific yield (unconfined storage) and a uniform value of 0.00001 was used to represent specific storage (confined storage) which are typical values for Long Island sediments. Monthly values for natural recharge from precipitation were calculated using a Soil-Water Balance model (Finkelstein and others, 2022). Components of anthropogenic recharge--wastewater return flow, storm water inflow, and inflow from leaky infrastructure--were estimated for monthly stress periods consistent with the methods described in Walter and others (2020). Monthly groundwater withdrawals for various sources, including public-water supply, industrial, remediation, and agricultural, were compiled or estimated for the same period. No additional calibration was conducted for this scenario and as such, it is possible that in some locations the model simulation results may not accurately represent the temporal responses to monthly hydrologic stresses.

Contacts

Point of Contact :: Christopher E Schubert
Originator :: Paul E Misut, Donald A Walter, Christopher E Schubert
Metadata Contact :: Christopher E Schubert
Publisher :: U.S. Geological Survey
Data Owner :: New York Water Science Center
Distributor :: U.S. Geological Survey - ScienceBase
USGS Mission Area :: Water Resources
SDC Data Owner :: New York Water Science Center

Attached Files

sorting

Metadata First

Recent First

Alphabetical

Click on title to download individual files attached to this item.

sir2020-5091_scen2024.xml Original FGDC Metadata	View	22.69 KB	application/fgdc+xml
bin.zip		2.67 MB	application/zip
model.zip		358.48 MB	application/zip
source.zip		84.58 MB	application/zip
		4.83 GB	application/x-zip-compressed
georef.zip		188.99 KB	application/zip
sir2020-5091_Thumbnail.jpg		161.99 KB	image/jpeg
modelgeoref.txt		1.07 KB	text/plain
ancillary.zip		752.24 MB	application/zip
readme.txt		17.15 KB	text/plain

Related External Resources

Type: Related Primary Publication

Walter, D.A., Masterson, J.P., Finkelstein, J.S., Monti, J., Jr., Misut, P.E., and Fienen, M.N., 2020, Simulation of groundwater flow in the regional aquifer system on Long Island, New York, for pumping and recharge conditions in 2005–15: U.S. Geological Survey Scientific Investigations Report 2020–5091, 75 p.	https://doi.org/10.3133/sir20205091
Finkelstein, J.S., Monti, J., Jr., Masterson, J.P., and Walter, D.A., 2022, Application of a soil-water-balance model to estimate annual groundwater recharge for Long Island, New York, 1900–2019: U.S. Geological Survey Scientific Investigations Report 2021–5143, 25 p.	https://doi.org/10.3133/sir20215143

Type: Method

Langevin, C.D., Hughes, J.D., Banta, E.R., Niswonger, R.G., Panday, Sorab, and Provost, A.M., 2017, Documentation for the MODFLOW 6 Groundwater Flow Model: U.S. Geological Survey Techniques and Methods, book 6, chap. A55, 197 p.	https://doi.org/10.3133/tm6A55
Doherty, J.E., and Hunt, R.J., 2010, Approaches to highly parameterized inversion—A guide to using PEST for groundwater-model calibration: U.S. Geological Survey Scientific Investigations Report 2010–5169, 59 p.	https://doi.org/10.3133/sir20105169

Purpose

This transient simulation of the Long Island regional groundwater model (Walter and others, 2020) can be used to study monthly groundwater flow conditions for years 2005–2019 and to provide boundary conditions for inset models. The development of the original model input and output files are documented in the U.S. Geological Survey Scientific Investigations Report 2020-5091 and the associated data release (https://doi.org/10.5066/P9KWQSEJ). Details of the scenario simulation are documented in this data release (https://doi.org/10.5066/P907ORL5).

MODFLOW 6 Model Scenario used to Simulate Transient Stresses, Heads, and Flows in the Regional Aquifer System of Long Island, New York, 2005-2019

Dates

Citation

Summary

Summary

Contacts

Attached Files

sorting

Metadata First

Recent First

Alphabetical

Purpose

Preview Image

Map

Communities

Tags

Provenance

Additional Information

Identifiers

Item Actions

View Item as ...

Save Item as ...

View Item...

Dates

Citation

Summary

Summary

Contacts

Attached Files sorting Metadata First Recent First Alphabetical

Related External Resources

Purpose

Preview Image

Map

Communities

Tags

Provenance

Additional Information

Identifiers

Item Actions

View Item as ...

Save Item as ...

View Item...

Attached Files

sorting

Metadata First

Recent First

Alphabetical