{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/95438"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/95438","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Channel-forming discharge and river meander migration modeling of the Pilcomayo River in the area of Misión La Paz (Argentina) and Pozo Hondo (Paraguay)","abstract":"The Pilcomayo River shows high planform mobility in the area of Misión La Paz (Argentina) - Pozo Hondo (Paraguay) that is associated with the river's bed material and the hydrologic regime of the stream. In order to better understand the river's morphodynamics, RVR Meander, a 2D depth-averaged analytical model, was used to assess the channel's planform evolution in time. The model uses a single discharge value for the simulations, thus estimation of a channel-forming discharge was necessary for the model application. Of the available methodologies for determining the channel-forming discharge, two are described herein, namely: the bankfull discharge and the effective discharge. The bankfull discharge was obtained with the stage-discharge rating curve after identifying the stage corresponding to the elevation of the active floodplain. The effective discharge was obtained from available data of flow and suspended sediment loads. The results present discrepancy with the bankfull having return periods between 4 and 7 years whereas the effective discharge has 1.01\\yrs of recurrence interval. Further analysis of the bankfull stage conditions are recommended. The RVR Meander results are compared with river centerline planform variations obtained from LANDSAT imagery for the period between 1987 and 2015. RVR Meander estimations of river mobility were remarkably lower than what the image analysis showed. River channel displacement seems to be caused by the recovery of old meander scars or the occurrence of cutoffs as opposed to bank erosion alone.","abstract_html":"The Pilcomayo River shows high planform mobility in the area of Misión La Paz (Argentina) - Pozo Hondo (Paraguay) that is associated with the river's bed material and the hydrologic regime of the stream. In order to better understand the river's morphodynamics, RVR Meander, a 2D depth-averaged analytical model, was used to assess the channel's planform evolution in time. The model uses a single discharge value for the simulations, thus estimation of a channel-forming discharge was necessary for the model application. Of the available methodologies for determining the channel-forming discharge, two are described herein, namely: the bankfull discharge and the effective discharge. The bankfull discharge was obtained with the stage-discharge rating curve after identifying the stage corresponding to the elevation of the active floodplain. The effective discharge was obtained from available data of flow and suspended sediment loads. The results present discrepancy with the bankfull having return periods between 4 and 7 years whereas the effective discharge has 1.01\\yrs of recurrence interval. Further analysis of the bankfull stage conditions are recommended. The RVR Meander results are compared with river centerline planform variations obtained from LANDSAT imagery for the period between 1987 and 2015. RVR Meander estimations of river mobility were remarkably lower than what the image analysis showed. River channel displacement seems to be caused by the recovery of old meander scars or the occurrence of cutoffs as opposed to bank erosion alone.","abstract_has_math":false,"creators":["Lacunza, Esteban"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":["Garcia, Marcelo H."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-03-01T16:36:32Z","date_published":"2017-03-01T16:36:32Z","updated_at":"2026-07-22T22:26:37Z","subjects":["Bankfull discharge effective discharge meander migration"],"languages":["en"],"rights":["Copyright 2016 Esteban Lacunza."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/95438","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Garcia, Marcelo H."]},{"key":"dc:creator","label":"Author","values":["Lacunza, Esteban"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2017-03-01T16:36:32Z","2019-03-02T10:15:07Z","2016-07-25","2016-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"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":["Bankfull discharge effective discharge meander migration"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2016 Esteban Lacunza."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/95438"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The Pilcomayo River shows high planform mobility in the area of Misión La Paz (Argentina) - Pozo Hondo (Paraguay) that is associated with the river's bed material and the hydrologic regime of the stream. In order to better understand the river's morphodynamics, RVR Meander, a 2D depth-averaged analytical model, was used to assess the channel's planform evolution in time. The model uses a single discharge value for the simulations, thus estimation of a channel-forming discharge was necessary for the model application. Of the available methodologies for determining the channel-forming discharge, two are described herein, namely: the bankfull discharge and the effective discharge. The bankfull discharge was obtained with the stage-discharge rating curve after identifying the stage corresponding to the elevation of the active floodplain. The effective discharge was obtained from available data of flow and suspended sediment loads. The results present discrepancy with the bankfull having return periods between 4 and 7 years whereas the effective discharge has 1.01\\yrs of recurrence interval. Further analysis of the bankfull stage conditions are recommended. The RVR Meander results are compared with river centerline planform variations obtained from LANDSAT imagery for the period between 1987 and 2015. RVR Meander estimations of river mobility were remarkably lower than what the image analysis showed. River channel displacement seems to be caused by the recovery of old meander scars or the occurrence of cutoffs as opposed to bank erosion alone.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-12-01","The student, Esteban Lacunza, accepted the attached license on 2016-07-22 at 16:54.","The student, Esteban Lacunza, submitted this Thesis for approval on 2016-07-22 at 16:58.","This Thesis was approved for publication on 2016-07-25 at 13:57.","DSpace SAF Submission Ingestion Package generated from Vireo submission #10083 on 2017-02-28 at 14:35:33","Made available in DSpace on 2017-03-01T16:36:32Z (GMT). No. of bitstreams: 2 LACUNZA-THESIS-2016.pdf: 9784457 bytes, checksum: 54103eb181b63cecac3e1e582d71b80b (MD5) LICENSE.txt: 4212 bytes, checksum: 3d5c514f905b83b8d98eb28f87a7e8d9 (MD5) Previous issue date: 2016-07-25","Embargo set by: Seth Robbins for item 98554 Lift date: 2019-03-01T16:37:19Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only Restriction Lifted for Item 98554 on 2019-03-02T10:15:07Z."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Channel-forming discharge and river meander migration modeling of the Pilcomayo River in the area of Misión La Paz (Argentina) and Pozo Hondo (Paraguay)"]}]}],"canonical_facts":{"dc:contributor":["Garcia, Marcelo H."],"dc:creator":["Lacunza, Esteban"],"dc:date":["2017-03-01T16:36:32Z","2019-03-02T10:15:07Z","2016-07-25","2016-12"],"dc:description":["The Pilcomayo River shows high planform mobility in the area of Misión La Paz (Argentina) - Pozo Hondo (Paraguay) that is associated with the river's bed material and the hydrologic regime of the stream. In order to better understand the river's morphodynamics, RVR Meander, a 2D depth-averaged analytical model, was used to assess the channel's planform evolution in time. The model uses a single discharge value for the simulations, thus estimation of a channel-forming discharge was necessary for the model application. Of the available methodologies for determining the channel-forming discharge, two are described herein, namely: the bankfull discharge and the effective discharge. The bankfull discharge was obtained with the stage-discharge rating curve after identifying the stage corresponding to the elevation of the active floodplain. The effective discharge was obtained from available data of flow and suspended sediment loads. The results present discrepancy with the bankfull having return periods between 4 and 7 years whereas the effective discharge has 1.01\\yrs of recurrence interval. Further analysis of the bankfull stage conditions are recommended. The RVR Meander results are compared with river centerline planform variations obtained from LANDSAT imagery for the period between 1987 and 2015. RVR Meander estimations of river mobility were remarkably lower than what the image analysis showed. River channel displacement seems to be caused by the recovery of old meander scars or the occurrence of cutoffs as opposed to bank erosion alone.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2018-12-01","The student, Esteban Lacunza, accepted the attached license on 2016-07-22 at 16:54.","The student, Esteban Lacunza, submitted this Thesis for approval on 2016-07-22 at 16:58.","This Thesis was approved for publication on 2016-07-25 at 13:57.","DSpace SAF Submission Ingestion Package generated from Vireo submission #10083 on 2017-02-28 at 14:35:33","Made available in DSpace on 2017-03-01T16:36:32Z (GMT). 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