{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T07:06:50Z","timestamp":1767164810875,"version":"build-2238731810"},"reference-count":12,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2018,5,15]],"date-time":"2018-05-15T00:00:00Z","timestamp":1526342400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["ngwa.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Groundwater"],"published-print":{"date-parts":[[2018,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Groundwater models developed for specific sites generally become obsolete within a few years due to changes in: (1) modeling technology; (2) site\/project personnel; (3) project funding; and (4) modeling objectives. Consequently, new models are sometimes developed for the same sites using the latest technology and data, but without potential knowledge gained from the prior models. When it occurs, this practice is particularly problematic because, although technology, data, and observed conditions change, development of the new numerical model may not consider the conceptual model's underpinnings. As a contrary situation, we present the unique case of a numerical flow and trichloroethylene (TCE) transport model that was first developed in 1993 and since revised and updated annually by the same personnel. The updates are prompted by an increase in the amount of data, exposure to a wider range of hydrologic conditions over increasingly longer timeframes, technological advances, evolving modeling objectives, and revised modeling methodologies. The history of updates shows smooth, incremental changes in the conceptual model and modeled aquifer parameters that result from both increase and decrease in complexity. Myriad modeling objectives have included demonstrating the ineffectiveness of a groundwater extraction\/injection system, evaluating potential TCE degradation, locating new monitoring points, and predicting likelihood of exceedance of groundwater standards. The application emphasizes an original tenet of successful groundwater modeling: iterative adjustment of the conceptual model based on observations of actual vs. model response.<\/jats:p>","DOI":"10.1111\/gwat.12787","type":"journal-article","created":{"date-parts":[[2018,4,17]],"date-time":"2018-04-17T05:19:17Z","timestamp":1523942357000},"page":"580-586","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Continuous Improvement of a Groundwater Model over a 20\u2010Year Period: Lessons Learned"],"prefix":"10.1111","volume":"56","author":[{"given":"Peter F.","family":"Andersen","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"James L.","family":"Ross","sequence":"additional","affiliation":[{"name":"Tetra Tech Inc.  Cleveland OH 44113"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jon P.","family":"Fenske","sequence":"additional","affiliation":[{"name":"U.S. Army Corps of Engineers, Hydrologic Engineering Center  Davis CA 95616"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2018,5,15]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1745-6584.2003.tb02584.x"},{"key":"e_1_2_8_3_1","volume-title":"Applied Groundwater Modeling","author":"Anderson M.P.","year":"1992"},{"key":"e_1_2_8_4_1","doi-asserted-by":"crossref","unstructured":"Asch T.H.2005. Summary and integration of geophysical investigations of the Tooele Army Depot (TEAD). Open File Report 2005\u20101338. Tooele Utah: United States Geological Survey.","DOI":"10.3133\/ofr20051338"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1745-6584.2006.00242.x"},{"key":"e_1_2_8_6_1","unstructured":"Burk N. C.Bishop andM.Lowe.2005. Wetlands in Tooele Valley Utah\u2014An evaluation of threats posed by groundwater development and drought. Utah Geological Survey Special Study 17."},{"key":"e_1_2_8_7_1","unstructured":"Greenwald R.1999. Hydraulic optimization demonstration for groundwater pump\u2010and\u2010treat systems HSI GeoTrans Inc. report prepared for Dynamac Corporation and U.S. Environmental Protection Agency."},{"key":"e_1_2_8_8_1","unstructured":"Hydrologic Engineering Center (HEC).1993. Hydrogeologic flow model for pump\u2010and\u2010treat system at Tooele Army Depot U.S. Army Corps of Engineers Hydrologic Engineering Center Draft Project Report July 1993."},{"key":"e_1_2_8_9_1","unstructured":"James M. Montgomery and Associates.1988. Groundwater quality assessment engineering report to Tooele Army Depot Utah. Prepared for the U.S. Army Corps of Engineers Contract No. DACA 87\u201086\u2010C0038 December 1988."},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1745-6584.1986.tb00993.x"},{"key":"e_1_2_8_11_1","unstructured":"Lambert P.M. andB.J.Stolp.1999. Hydrology and simulation of the groundwater flow system in the Tooele Valley Utah. U.S. Geological Survey Water Resources Investigations Report 99\u20104014 60."},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1111\/gwat.12786"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1745-6584.1999.tb00980.x"}],"container-title":["Groundwater"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fgwat.12787","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/gwat.12787","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1111\/gwat.12787","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/ngwa.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/gwat.12787","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,11,2]],"date-time":"2025-11-02T13:34:58Z","timestamp":1762090498000},"score":1,"resource":{"primary":{"URL":"https:\/\/ngwa.onlinelibrary.wiley.com\/doi\/10.1111\/gwat.12787"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,5,15]]},"references-count":12,"aliases":["10.1111\/gwat.12671"],"journal-issue":{"issue":"4","published-print":{"date-parts":[[2018,7]]}},"alternative-id":["10.1111\/gwat.12787"],"URL":"https:\/\/doi.org\/10.1111\/gwat.12787","archive":["Portico"],"relation":{},"ISSN":["0017-467X","1745-6584"],"issn-type":[{"value":"0017-467X","type":"print"},{"value":"1745-6584","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,5,15]]},"assertion":[{"value":"2018-04-06","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2018-04-06","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2018-05-15","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}