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Created: | Mar 21, 2019 at 2 a.m. | |
Last updated: | Dec 19, 2019 at 1:15 a.m. | |
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Content types: | Model Program Content |
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Abstract
Heterogeneity in the hyporheic zone or near-field geology can impart a threshold effect on groundwater-surface water (GW-SW) exchange. Variations in the texture of riverbed sediments and lithologic variations in adjacent and underlying geology are examples of common heterogeneities. Hydrologic interaction with these heterogeneities leads to distinct types of “behavior” that “switch” when surface-water or groundwater levels rise above or fall below the interface of the layers of differing lithology. A dynamic water-balance/nonlinear-reservoir model incorporating threshold effects was developed for a perched phreatic aquifer–river system. Four conceptualizations of the system were modeled, 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, using combinations of zero, one, or two thresholds representing layered heterogeneity in riverbank and/or aquifer lithology. Application of the model code was demonstrated at a location in the Lower Mississippi River Valley, USA. Models were run using hourly river-gage measurements, calibrated to a 382-day period of corresponding measurements in a nearby well, and further assessed for a 3.5-year period representing varied hydrologic conditions. The best performance was demonstrated by the model incorporating threshold effects, which elucidated four modes of GW-SW system behavior controlled by both riverbank (riverbed hydraulic conductivity) and aquifer (hydraulic conductivity and storage coefficient) properties. The dynamical system modeling approach incorporates the salient hydrologic processes of a GW-SW system with layered heterogeneity. Based upon fundamental mass-conservation concepts, the simple dynamic water-balance/linear-reservoir model has broad applicability to many hydrogeologic settings.
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README.txt
Contents of archive: 12/18/2019 02:42 PM 283 CHECKERR.txt 05/19/2018 08:15 PM 241,804 Hdata3.txt 11/07/2019 11:57 PM 805,534 Hdata4.txt 12/18/2019 09:36 AM 2,324 mod1_in_par0m1r0_F.txt 12/18/2019 09:58 AM 2,334 mod1_in_par0m1r0_POR.txt 12/18/2019 09:52 AM 2,334 mod1_in_par0m1r0_V1.txt 12/18/2019 09:54 AM 2,333 mod1_in_par0m1r0_V2.txt 12/18/2019 09:46 AM 2,332 mod1_in_par4m1r0_C.txt 12/18/2019 02:41 PM 614,290 mod1_out_haqo3_C.csv 12/18/2019 09:36 AM 614,290 mod1_out_haqo3_F.csv 12/18/2019 09:59 AM 2,099,412 mod1_out_haqo3_POR.csv 12/18/2019 09:55 AM 768,658 mod1_out_haqo3_V1.csv 12/18/2019 09:56 AM 628,159 mod1_out_haqo3_V2.csv 12/18/2019 01:59 PM 2,354 mod2_in_par0m2r0_F.txt 12/18/2019 02:13 PM 2,356 mod2_in_par0m2r0_POR.txt 12/18/2019 02:03 PM 2,356 mod2_in_par0m2r0_V1.txt 12/18/2019 02:08 PM 2,356 mod2_in_par0m2r0_V2.txt 12/18/2019 10:10 AM 2,354 mod2_in_par6m2r0_C.txt 12/18/2019 02:42 PM 614,290 mod2_out_haqo3_C.csv 12/18/2019 02:42 PM 614,290 mod2_out_haqo3_F.csv 12/18/2019 02:13 PM 2,099,412 mod2_out_haqo3_POR.csv 12/18/2019 02:04 PM 768,658 mod2_out_haqo3_V1.csv 12/18/2019 02:09 PM 628,159 mod2_out_haqo3_V2.csv 12/18/2019 02:40 PM 2,220 mod3_in_par0m3r0_F.txt 12/18/2019 02:50 PM 2,220 mod3_in_par0m3r0_POR.txt 12/18/2019 02:45 PM 2,220 mod3_in_par0m3r0_V1.txt 12/18/2019 02:48 PM 2,220 mod3_in_par0m3r0_V2.txt 12/18/2019 02:40 PM 2,221 mod3_in_par10m3r0_C.txt 12/18/2019 02:43 PM 614,290 mod3_out_haqo3_C.csv 12/18/2019 02:44 PM 614,290 mod3_out_haqo3_F.csv 12/18/2019 02:51 PM 2,099,412 mod3_out_haqo3_POR.csv 12/18/2019 02:46 PM 768,658 mod3_out_haqo3_V1.csv 12/18/2019 02:48 PM 628,159 mod3_out_haqo3_V2.csv 12/18/2019 02:58 PM 2,220 mod4_in_par0m4r0_F.txt 12/18/2019 03:05 PM 2,220 mod4_in_par0m4r0_POR.txt 12/18/2019 03:01 PM 2,220 mod4_in_par0m4r0_V1.txt 12/18/2019 03:03 PM 2,220 mod4_in_par0m4r0_V2.txt 12/18/2019 02:54 PM 2,220 mod4_in_par9m4r0_C.txt 12/18/2019 02:56 PM 614,290 mod4_out_haqo3_C.csv 12/18/2019 02:58 PM 614,290 mod4_out_haqo3_F.csv 12/18/2019 03:06 PM 2,099,412 mod4_out_haqo3_POR.csv 12/18/2019 03:01 PM 768,658 mod4_out_haqo3_V1.csv 12/18/2019 03:03 PM 628,159 mod4_out_haqo3_V2.csv 12/18/2019 03:09 PM 7,498 parcovcor.csv 12/18/2019 03:09 PM 4,868,666 parssens.csv 12/18/2019 08:56 AM 418 README.txt 03/20/2019 11:39 PM 3,598 README_filenames.csv 11/14/2019 11:34 PM 287,598 Vdata1.txt 11/14/2019 11:35 PM 232,575 Vdata2.txt 10/21/2019 09:21 PM 3,044,864 wbnlr.exe 10/21/2019 09:21 PM 55,152 wbnlr.for 51 File(s) 37,649,443 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., 20XX, A dynamic water-balance/nonlinear-reservoir model of a perched phreatic aquiferriver system with hydrogeologic threshold effects: Water Resources Research -- submitted for review April 2019, revised manuscript submitted December 2019
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Comments
Andrew Michael O'Reilly 4 years, 3 months ago
Paper now published: O’Reilly, A.M., Holt, R.M., Davidson, G.R., Patton, A.C., and Rigby, J.R., 2020, A dynamic water-balance/nonlinear-reservoir model of a perched phreatic aquifer–river system with hydrogeologic threshold effects: Water Resources Research. In Press. doi:10.1029/2019WR025382
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