{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/106462"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/106462","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Numerical modeling of agricultural tile drainage water quality with health considerations","abstract":"Nitrogen fertilizers are an anthropogenic source of potential human and environmental health concerns. Variable rate fertilizer application technologies utilized by production agriculture increase the complexity of interactions with the natural environment, notably water quality originating from farm fields. In this study, the diversity in spatial and temporal variables was simulated using numerical methods and the reactive transport model TOUGHREACT to analyze these processes and thus better predict areas or scenarios of potential concern. Modeling results were calibrated and verified with 4 production agricultural field sites to better quantify and qualify nitrogen fate and transport and their potential impact on human health and the environment. In addition, health impacts were reviewed with respect to variable agricultural inputs. The numerical modeling methods provided insight into mixing and loading, but showcased that by the time concentration profiles reached the tile and sampling point, most loading information had been obscured. TOUGHREACT proved to be a valid and useful tool to simulate many of the factors affecting fate and transport, but additional calibration with real world data is needed. Agricultural applicators around the world are subject to many stresses and hazards regardless of the method of application, but acute exposure incidents are highly rare. Literature was reviewed to determine the common stressors and agents of injury for agricultural applicators. Additionally, the ensuing fate of nitrate in the environment and drinking water system was evaluated via a case study and spatial correlations. Results indicated populations influenced by agricultural nitrogen inputs into their water supply did not show a direct correlation to increased cancer risks.","abstract_html":"Nitrogen fertilizers are an anthropogenic source of potential human and environmental health concerns. Variable rate fertilizer application technologies utilized by production agriculture increase the complexity of interactions with the natural environment, notably water quality originating from farm fields. In this study, the diversity in spatial and temporal variables was simulated using numerical methods and the reactive transport model TOUGHREACT to analyze these processes and thus better predict areas or scenarios of potential concern. Modeling results were calibrated and verified with 4 production agricultural field sites to better quantify and qualify nitrogen fate and transport and their potential impact on human health and the environment. In addition, health impacts were reviewed with respect to variable agricultural inputs. The numerical modeling methods provided insight into mixing and loading, but showcased that by the time concentration profiles reached the tile and sampling point, most loading information had been obscured. TOUGHREACT proved to be a valid and useful tool to simulate many of the factors affecting fate and transport, but additional calibration with real world data is needed. Agricultural applicators around the world are subject to many stresses and hazards regardless of the method of application, but acute exposure incidents are highly rare. Literature was reviewed to determine the common stressors and agents of injury for agricultural applicators. Additionally, the ensuing fate of nitrate in the environment and drinking water system was evaluated via a case study and spatial correlations. Results indicated populations influenced by agricultural nitrogen inputs into their water supply did not show a direct correlation to increased cancer risks.","abstract_has_math":false,"creators":["Wright, Kevin Nathaniel"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Agricultural & Biological Engr","degree_department":null,"school":null,"contributors":["Davidson, Paul C","Kalita, Prasanta","Cooke, Richard","Druhan, Jennifer","Fischer-Brown, Amy"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2020,"date_issued":"2020-03-02T22:38:47Z","date_published":"2020-03-02T22:38:47Z","updated_at":"2026-07-22T22:24:47Z","subjects":["Nitrogen, Nitrate, Tile, Drainage, Modeling"],"languages":["en"],"rights":["Copyright 2019 Kevin Wright"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/106462","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Davidson, Paul C","Kalita, Prasanta","Cooke, Richard","Druhan, Jennifer","Fischer-Brown, Amy"]},{"key":"dc:creator","label":"Author","values":["Wright, Kevin Nathaniel"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2020-03-02T22:38:47Z","2022-03-03T10:15:13Z","2019-11-26","2019-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Agricultural & Biological Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Nitrogen, Nitrate, Tile, Drainage, Modeling"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2019 Kevin Wright"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/106462"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Nitrogen fertilizers are an anthropogenic source of potential human and environmental health concerns. Variable rate fertilizer application technologies utilized by production agriculture increase the complexity of interactions with the natural environment, notably water quality originating from farm fields. In this study, the diversity in spatial and temporal variables was simulated using numerical methods and the reactive transport model TOUGHREACT to analyze these processes and thus better predict areas or scenarios of potential concern. Modeling results were calibrated and verified with 4 production agricultural field sites to better quantify and qualify nitrogen fate and transport and their potential impact on human health and the environment. In addition, health impacts were reviewed with respect to variable agricultural inputs. The numerical modeling methods provided insight into mixing and loading, but showcased that by the time concentration profiles reached the tile and sampling point, most loading information had been obscured. TOUGHREACT proved to be a valid and useful tool to simulate many of the factors affecting fate and transport, but additional calibration with real world data is needed. Agricultural applicators around the world are subject to many stresses and hazards regardless of the method of application, but acute exposure incidents are highly rare. Literature was reviewed to determine the common stressors and agents of injury for agricultural applicators. Additionally, the ensuing fate of nitrate in the environment and drinking water system was evaluated via a case study and spatial correlations. Results indicated populations influenced by agricultural nitrogen inputs into their water supply did not show a direct correlation to increased cancer risks.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-12-01","The student, Kevin Wright, accepted the attached license on 2019-11-25 at 12:09.","The student, Kevin Wright, submitted this Dissertation for approval on 2019-11-25 at 12:18.","This Dissertation was approved for publication on 2019-11-26 at 14:28.","DSpace SAF Submission Ingestion Package generated from Vireo submission #14610 on 2020-02-28 at 17:36:53","Made available in DSpace on 2020-03-02T22:38:47Z (GMT). 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Variable rate fertilizer application technologies utilized by production agriculture increase the complexity of interactions with the natural environment, notably water quality originating from farm fields. In this study, the diversity in spatial and temporal variables was simulated using numerical methods and the reactive transport model TOUGHREACT to analyze these processes and thus better predict areas or scenarios of potential concern. Modeling results were calibrated and verified with 4 production agricultural field sites to better quantify and qualify nitrogen fate and transport and their potential impact on human health and the environment. In addition, health impacts were reviewed with respect to variable agricultural inputs. The numerical modeling methods provided insight into mixing and loading, but showcased that by the time concentration profiles reached the tile and sampling point, most loading information had been obscured. TOUGHREACT proved to be a valid and useful tool to simulate many of the factors affecting fate and transport, but additional calibration with real world data is needed. Agricultural applicators around the world are subject to many stresses and hazards regardless of the method of application, but acute exposure incidents are highly rare. Literature was reviewed to determine the common stressors and agents of injury for agricultural applicators. Additionally, the ensuing fate of nitrate in the environment and drinking water system was evaluated via a case study and spatial correlations. Results indicated populations influenced by agricultural nitrogen inputs into their water supply did not show a direct correlation to increased cancer risks.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-12-01","The student, Kevin Wright, accepted the attached license on 2019-11-25 at 12:09.","The student, Kevin Wright, submitted this Dissertation for approval on 2019-11-25 at 12:18.","This Dissertation was approved for publication on 2019-11-26 at 14:28.","DSpace SAF Submission Ingestion Package generated from Vireo submission #14610 on 2020-02-28 at 17:36:53","Made available in DSpace on 2020-03-02T22:38:47Z (GMT). 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