{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/88120"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/88120","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Spatial and temporal variability in floodplain sedimentation during individual hydrologic events on a lowland, meandering river: Allerton Park, Monticello, Illinois","abstract":"Floodplains are major sinks and sources for sediment within the fluvial system and are constructed through two main processes: lateral and vertical accretion. In fine grained systems, vertical accretion dominates. Overbank flooding and floodplain inundation are dependent on bank height and local topographic variability and this leads to highly variable deposition both spatially and temporally. In order to better understand the dynamics of flooding, single flooding events need to be observed and characterized. Using artificial turf mats as sediment traps, I measured floodplain deposition during five flood events on the floodplain of the Sangamon River at Allerton Park in Monticello, Illinois. The five events observed had peak discharges of 40-250 m3/s. During each event, deposition was found to occur most frequently and with greatest magnitude in and adjacent to floodplain channels. Sediment thicknesses accumulated during each flood event vary from 0-4.5 mm with the largest deposition, equivalent to ~14 mm/year, being observed near a crevasse splay which may be evolving toward a meander cut-off. Flow simulations using the iRIC open source 2-dimensional solver of the St-Venant shallow water equations show how water inundates the floodplain during the rising limb of the largest discharge event observed. Geomorphic features such as floodplain channels, scroll bar topography, and, depressions drastically impact the routing of water over the floodplain and, ultimately, the location and amount of deposition.","abstract_html":"Floodplains are major sinks and sources for sediment within the fluvial system and are constructed through two main processes: lateral and vertical accretion. In fine grained systems, vertical accretion dominates. Overbank flooding and floodplain inundation are dependent on bank height and local topographic variability and this leads to highly variable deposition both spatially and temporally. In order to better understand the dynamics of flooding, single flooding events need to be observed and characterized. Using artificial turf mats as sediment traps, I measured floodplain deposition during five flood events on the floodplain of the Sangamon River at Allerton Park in Monticello, Illinois. The five events observed had peak discharges of 40-250 m3/s. During each event, deposition was found to occur most frequently and with greatest magnitude in and adjacent to floodplain channels. Sediment thicknesses accumulated during each flood event vary from 0-4.5 mm with the largest deposition, equivalent to ~14 mm/year, being observed near a crevasse splay which may be evolving toward a meander cut-off. Flow simulations using the iRIC open source 2-dimensional solver of the St-Venant shallow water equations show how water inundates the floodplain during the rising limb of the largest discharge event observed. Geomorphic features such as floodplain channels, scroll bar topography, and, depressions drastically impact the routing of water over the floodplain and, ultimately, the location and amount of deposition.","abstract_has_math":false,"creators":["Arnott, Donald Ryan"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Geology","degree_department":null,"school":null,"contributors":["Anders, Alison M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-29T20:38:54Z","date_published":"2015-09-29T20:38:54Z","updated_at":"2026-07-22T22:26:31Z","subjects":["Flooding","Sedimentation"],"languages":["en"],"rights":["Copyright 2015 Donald Ryan Arnott"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/88120","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Anders, Alison M."]},{"key":"dc:creator","label":"Author","values":["Arnott, Donald Ryan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-29T20:38:54Z","2015-08","2015-07-23","2015-8"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Geology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"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":["Flooding","Sedimentation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2015 Donald Ryan Arnott"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/88120"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Floodplains are major sinks and sources for sediment within the fluvial system and are constructed through two main processes: lateral and vertical accretion. In fine grained systems, vertical accretion dominates. Overbank flooding and floodplain inundation are dependent on bank height and local topographic variability and this leads to highly variable deposition both spatially and temporally. In order to better understand the dynamics of flooding, single flooding events need to be observed and characterized. Using artificial turf mats as sediment traps, I measured floodplain deposition during five flood events on the floodplain of the Sangamon River at Allerton Park in Monticello, Illinois. The five events observed had peak discharges of 40-250 m3/s. During each event, deposition was found to occur most frequently and with greatest magnitude in and adjacent to floodplain channels. Sediment thicknesses accumulated during each flood event vary from 0-4.5 mm with the largest deposition, equivalent to ~14 mm/year, being observed near a crevasse splay which may be evolving toward a meander cut-off. Flow simulations using the iRIC open source 2-dimensional solver of the St-Venant shallow water equations show how water inundates the floodplain during the rising limb of the largest discharge event observed. Geomorphic features such as floodplain channels, scroll bar topography, and, depressions drastically impact the routing of water over the floodplain and, ultimately, the location and amount of deposition.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-09-29 without embargo terms","The student, Donald Arnott, accepted the attached license on 2015-07-23 at 10:46.","The student, Donald Arnott, submitted this Thesis for approval on 2015-07-23 at 10:51.","This Thesis was approved for publication on 2015-07-23 at 12:14.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8629 on 2015-09-29 at 13:23:39","Made available in DSpace on 2015-09-29T20:38:54Z (GMT). No. of bitstreams: 3 ARNOTT-THESIS-2015.pdf: 1245568 bytes, checksum: 52215794956e624903184ee1d6ec5fb8 (MD5) Arnott_DonaldRyan_Thesis.docx: 6014618 bytes, checksum: 1cf042f9c51a7d5704bd97397df15683 (MD5) LICENSE.txt: 4210 bytes, checksum: 945115769ba010a0e0fcf2f7e6de3792 (MD5) Previous issue date: 2015-07-23"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Spatial and temporal variability in floodplain sedimentation during individual hydrologic events on a lowland, meandering river: Allerton Park, Monticello, Illinois"]}]}],"canonical_facts":{"dc:contributor":["Anders, Alison M."],"dc:creator":["Arnott, Donald Ryan"],"dc:date":["2015-09-29T20:38:54Z","2015-08","2015-07-23","2015-8"],"dc:description":["Floodplains are major sinks and sources for sediment within the fluvial system and are constructed through two main processes: lateral and vertical accretion. In fine grained systems, vertical accretion dominates. Overbank flooding and floodplain inundation are dependent on bank height and local topographic variability and this leads to highly variable deposition both spatially and temporally. In order to better understand the dynamics of flooding, single flooding events need to be observed and characterized. Using artificial turf mats as sediment traps, I measured floodplain deposition during five flood events on the floodplain of the Sangamon River at Allerton Park in Monticello, Illinois. The five events observed had peak discharges of 40-250 m3/s. During each event, deposition was found to occur most frequently and with greatest magnitude in and adjacent to floodplain channels. Sediment thicknesses accumulated during each flood event vary from 0-4.5 mm with the largest deposition, equivalent to ~14 mm/year, being observed near a crevasse splay which may be evolving toward a meander cut-off. Flow simulations using the iRIC open source 2-dimensional solver of the St-Venant shallow water equations show how water inundates the floodplain during the rising limb of the largest discharge event observed. Geomorphic features such as floodplain channels, scroll bar topography, and, depressions drastically impact the routing of water over the floodplain and, ultimately, the location and amount of deposition.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-09-29 without embargo terms","The student, Donald Arnott, accepted the attached license on 2015-07-23 at 10:46.","The student, Donald Arnott, submitted this Thesis for approval on 2015-07-23 at 10:51.","This Thesis was approved for publication on 2015-07-23 at 12:14.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8629 on 2015-09-29 at 13:23:39","Made available in DSpace on 2015-09-29T20:38:54Z (GMT). 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