MODFLOW-NWT model scenarios used to evaluate potential effects of proposed drainage modifications on groundwater discharge in the vicinity of Long Lake, Indiana Dunes National Lakeshore, near Gary, Indiana
September 14, 2018
A previously developed three-dimensional groundwater-flow model that used the MODFLOW-NWT code
was updated to simulate the effects of various proposed drainage modifications aimed at reducing
discharge to a sanitary sewer system near Long Lake in Indiana Dunes National Lakeshore, near Gary,
Indiana. The original steady-state model documented in the USGS report (https://pubs.usgs.gov/sir/2013/5003/)
and data release (https://dx.doi.org/10.5066/F7D21VS2) was calibrated to a low groundwater level/dry weather
condition of October 2002 and a high groundwater level/wet weather condition of March 2011. For this study
the 2002 and 2011 simulations were updated with elevation data collected from a 2017 survey of primary
surface-water features that affect groundwater levels to create dry- or wet-weather base simulations
(figs. 1 and 2). Eight scenario models were created by modifying the updated 2002 and 2011 base
simulations. The scenarios examined the effects of potential modifications to the hydrologic system:
(scenario 1a) diverting water from US-12 weir (site CS-1) to County Line Road ditch through underground
pipes [figs. 3-6], (scenario 1b) diverting water from US-12 ditch to Spencer ditch, then trenching Spencer
ditch to the County Line Road ditch to drain to the Little Calumet River [figs. 7 and 8], (scenario 2)
Extending and altering US-12 ditch to flow east toward County Line Road ditch and drain to the Little
Calumet River [figs. 9 and 10], and (scenario 3) installing culverts under US-12 and adjacent railroad
lines to connect US-12 ditch with West Long Lake [figs. 11-14]. This data release contains all files and
associated information needed to run these additional simulations.
was updated to simulate the effects of various proposed drainage modifications aimed at reducing
discharge to a sanitary sewer system near Long Lake in Indiana Dunes National Lakeshore, near Gary,
Indiana. The original steady-state model documented in the USGS report (https://pubs.usgs.gov/sir/2013/5003/)
and data release (https://dx.doi.org/10.5066/F7D21VS2) was calibrated to a low groundwater level/dry weather
condition of October 2002 and a high groundwater level/wet weather condition of March 2011. For this study
the 2002 and 2011 simulations were updated with elevation data collected from a 2017 survey of primary
surface-water features that affect groundwater levels to create dry- or wet-weather base simulations
(figs. 1 and 2). Eight scenario models were created by modifying the updated 2002 and 2011 base
simulations. The scenarios examined the effects of potential modifications to the hydrologic system:
(scenario 1a) diverting water from US-12 weir (site CS-1) to County Line Road ditch through underground
pipes [figs. 3-6], (scenario 1b) diverting water from US-12 ditch to Spencer ditch, then trenching Spencer
ditch to the County Line Road ditch to drain to the Little Calumet River [figs. 7 and 8], (scenario 2)
Extending and altering US-12 ditch to flow east toward County Line Road ditch and drain to the Little
Calumet River [figs. 9 and 10], and (scenario 3) installing culverts under US-12 and adjacent railroad
lines to connect US-12 ditch with West Long Lake [figs. 11-14]. This data release contains all files and
associated information needed to run these additional simulations.
Citation Information
Publication Year | 2018 |
---|---|
Title | MODFLOW-NWT model scenarios used to evaluate potential effects of proposed drainage modifications on groundwater discharge in the vicinity of Long Lake, Indiana Dunes National Lakeshore, near Gary, Indiana |
DOI | 10.5066/F7ZP45D5 |
Authors | Alexander D Riddle |
Product Type | Data Release |
Record Source | USGS Asset Identifier Service (AIS) |
USGS Organization | Ohio-Kentucky-Indiana Water Science Center |
Rights | This work is marked with CC0 1.0 Universal |
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Hydrologic data and groundwater flow simulations in the vicinity of Long Lake, Indiana Dunes National Lakeshore, near Gary, Indiana
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