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| Created: | Dec 19, 2019 at 12:52 a.m. | |
| Last updated: | Dec 19, 2019 at 12:54 a.m. | |
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| Content types: | Model Program Content |
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Abstract
Layered heterogeneity in riverbank or aquifer lithology imparts a threshold effect causing nonlinear interactions between river stage and groundwater level that can be simulated as a dynamical system. A simple dynamic water-balance/linear-reservoir model was developed to investigate threshold effects at a location on the Big Sunflower River in the Lower Mississippi River Valley, USA. Four conceptual models, each of which simulates a perched aquifer as a dynamical system that receives recharge from the riverbank and loses water to an underlying regional aquifer, were tested using combinations of zero, one, or two thresholds representing layered heterogeneity in riverbank and aquifer lithology. Models were run using a 382-day period of hourly stream-gauge measurements and calibrated to corresponding measurements in a nearby well. All models matched observed groundwater levels reasonably well, with a maximum root-mean-square error (RMSE) of 0.49 m for the calibration period. Final model performance was assessed for a 3.5-year period representing varied hydrologic conditions. The heterogeneous models matched high-stage events substantially better than the homogeneous model. The best performance was by the model incorporating threshold effects (RMSE of 0.268 m for the period of record), which elucidated four modes of GW-SW system behavior controlled by both riverbank (riverbed hydraulic conductivity) and aquifer (transmissivity and storage coefficient) properties. The dynamical system modeling approach is relevant to any GW-SW system with layered heterogeneity, and the simple dynamic water-balance/linear-reservoir model has broad applicability to a wide range of hydrogeologic settings.
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README.txt
Contents of archive: 03/21/2019 12:24 AM. 03/21/2019 12:24 AM .. 05/19/2018 09:15 PM 241,804 Hdata3.txt 10/06/2018 10:53 PM 788,691 Hdata4.txt 10/06/2018 02:01 AM 3,044,352 linresvor4.exe 10/06/2018 02:00 AM 46,407 linresvor4.for 10/06/2018 08:27 PM 2,129 mod1_in_par0m1r0V1_lal.txt 10/06/2018 08:34 PM 2,129 mod1_in_par0m1r0V2_lal.txt 10/06/2018 10:43 PM 2,129 mod1_in_par0m1r0VCV_lal.txt 10/06/2018 12:40 PM 2,122 mod1_in_par3m1r0C_lal.txt 03/20/2019 11:55 PM 559,282 mod1_out_haqo3_C.csv 03/20/2019 11:46 PM 736,426 mod1_out_haqo3_V1.csv 03/20/2019 11:47 PM 571,665 mod1_out_haqo3_V2.csv 03/20/2019 11:48 PM 1,871,819 mod1_out_haqo3_VCV.csv 10/06/2018 08:48 PM 2,127 mod2_in_par0m2r0V1.txt 10/06/2018 08:58 PM 2,127 mod2_in_par0m2r0V2.txt 10/06/2018 10:55 PM 2,127 mod2_in_par0m2r0VCV.txt 10/06/2018 10:35 PM 2,120 mod2_in_par5m2r0C.txt 03/21/2019 12:00 AM 559,282 mod2_out_haqo3_C.csv 03/21/2019 12:02 AM 736,426 mod2_out_haqo3_V1.csv 03/21/2019 12:03 AM 571,665 mod2_out_haqo3_V2.csv 03/21/2019 12:04 AM 1,871,819 mod2_out_haqo3_VCV.csv 10/06/2018 09:15 PM 2,141 mod3_in_par0m3r0V1.txt 10/06/2018 09:23 PM 2,141 mod3_in_par0m3r0V2.txt 10/06/2018 10:57 PM 2,141 mod3_in_par0m3r0VCV.txt 10/06/2018 05:35 PM 2,115 mod3_in_par9m3r0C.txt 03/21/2019 12:15 AM 559,282 mod3_out_haqo3_C.csv 03/21/2019 12:16 AM 736,426 mod3_out_haqo3_V1.csv 03/21/2019 12:17 AM 571,665 mod3_out_haqo3_V2.csv 03/21/2019 12:18 AM 1,871,819 mod3_out_haqo3_VCV.csv 10/06/2018 09:45 PM 2,135 mod4_in_par0m4r0V1.txt 10/06/2018 09:51 PM 2,135 mod4_in_par0m4r0V2.txt 10/06/2018 10:59 PM 2,135 mod4_in_par0m4r0VCV.txt 10/06/2018 06:20 PM 2,118 mod4_in_par7m4r0.txt 03/21/2019 12:20 AM 559,282 mod4_out_haqo3_C.csv 03/21/2019 12:22 AM 736,426 mod4_out_haqo3_V1.csv 03/21/2019 12:23 AM 571,665 mod4_out_haqo3_V2.csv 03/21/2019 12:23 AM 1,871,819 mod4_out_haqo3_VCV.csv 09/22/2018 05:52 PM 303,521 Vdata1.txt 09/22/2018 09:21 PM 232,487 Vdata2.txt 38 File(s) 19,648,101 bytes See README.csv for explanation of each file. Model documented in O'Reilly, A.M., Holt, R.M., Davidson, G.R., and Rigby, J.R., 2019, A dynamic water-balance/linear-reservoir model of hydrogeologic threshold effects on groundwater-surface water interaction: Water Resources Research -- submitted for review March 2019
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| Name | Value |
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| MIGRATED_FROM | Model Program Resource |
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| The content of this resource is derived from | http://www.hydroshare.org/resource/7bd7b3f4c91741b9bf22bfff717ec286 |
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This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
Comments
Andrew Michael O'Reilly 4 years, 11 months ago
This resource is the linear reservoir analogue of the resource: O'Reilly, A. M., and Holt, R. M. (2019). Dynamic Water-Balance/Nonlinear-Reservoir GW-SW interaction model, HydroShare, http://www.hydroshare.org/resource/7bd7b3f4c91741b9bf22bfff717ec286. The linear reservoir model documentation is only available in an unpublished manuscript, which was the precursor to the nonlinear reservoir model published in the reference provided in the README.txt file.
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