{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/122052"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/122052","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Spatial patterns and drivers of floodplain change in the Squamish River, a dynamic gravel bed river","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms","abstract_has_math":false,"creators":["Allen, Emily Elizabeth"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Geography and GIS","degree_department":null,"school":null,"contributors":["Cienciała, Piotr P"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-12","date_published":"2023-12","updated_at":"2026-07-22T22:25:00Z","subjects":["Floodplain","Channel Change","Gravel Bed River","Geomorphology","British Columbia","Erosion","Deposition"],"languages":["en","eng"],"rights":["Copyright 2023 Emily E. Allen"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/122052","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Cienciała, Piotr P"]},{"key":"dc:creator","label":"Author","values":["Allen, Emily Elizabeth"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2023-12","2023-12-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Geography and GIS"]},{"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":["Floodplain","Channel Change","Gravel Bed River","Geomorphology","British Columbia","Erosion","Deposition"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2023 Emily E. Allen"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/122052"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms","The student, Emily Allen, accepted the attached license on 2023-12-04 at 13:21.","The student, Emily Allen, submitted this Thesis for approval on 2023-12-04 at 14:54.","This Thesis was approved for publication on 2023-12-05 at 16:47.","DSpace SAF Submission Ingestion Package generated from Vireo submission #20123 on 2024-03-01 at 13:15:23","The geomorphic interplay between river channels and their floodplains is important for human society and natural ecosystems. Alluvial floodplains have long been ideal locations for human settlement. Thus, for as long as humans have lived along rivers, flooding and channel erosion have posed a hazard to their settlements. As a result, humans have often sought to restrict the natural river-floodplain interactions, including inundation and erosional-depositional processes, and engineer rivers to allow development of floodplains. These actions have been detrimental to floodplain ecology. Unaltered river floodplains are biologically diverse and highly productive ecosystems. They contain a diverse array of habitats that are important for the survival of aquatic, amphibious, and terrestrial organisms. In order to restore floodplain functions, we need to know more about spatial patterns and drivers of floodplain change. This thesis examines the spatial patterns and drivers of floodplain dynamics in the Squamish River, in southern British Columbia, Canada, between 2009 and 2019. Patterns and magnitudes of floodplain construction and erosion were identified and measured from annual remotely-sensed data from Planet.com. The area of interest was classified into water, sediment, and vegetation using a simple but effective classification based on the Normalized Difference Vegetation Index (NDVI). Change was quantified by comparing each year with the next using the Change Detection Wizard in ArcGIS Pro. The effect of three drivers of floodplain change – channel slope, valley confinement, and sediment supply – were examined with regard to rates of floodplain construction and erosion. The calculated rates of change in the Squamish River were in the range of 0.9 m – 13.4 m per year for construction and 1.7 – 15 m per year for erosion. However, no clear driver emerged as the specific cause of the floodplain change; instead, channel and floodplain dynamics seem to be driven by the complicated interplay of multiple limiting factors including channel slope, valley width, and sediment supply, as well as by human interventions and floodplain vegetation."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Spatial patterns and drivers of floodplain change in the Squamish River, a dynamic gravel bed river"]}]}],"canonical_facts":{"dc:contributor":["Cienciała, Piotr P"],"dc:creator":["Allen, Emily Elizabeth"],"dc:date":["2023-12","2023-12-05"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms","The student, Emily Allen, accepted the attached license on 2023-12-04 at 13:21.","The student, Emily Allen, submitted this Thesis for approval on 2023-12-04 at 14:54.","This Thesis was approved for publication on 2023-12-05 at 16:47.","DSpace SAF Submission Ingestion Package generated from Vireo submission #20123 on 2024-03-01 at 13:15:23","The geomorphic interplay between river channels and their floodplains is important for human society and natural ecosystems. Alluvial floodplains have long been ideal locations for human settlement. Thus, for as long as humans have lived along rivers, flooding and channel erosion have posed a hazard to their settlements. As a result, humans have often sought to restrict the natural river-floodplain interactions, including inundation and erosional-depositional processes, and engineer rivers to allow development of floodplains. These actions have been detrimental to floodplain ecology. Unaltered river floodplains are biologically diverse and highly productive ecosystems. They contain a diverse array of habitats that are important for the survival of aquatic, amphibious, and terrestrial organisms. In order to restore floodplain functions, we need to know more about spatial patterns and drivers of floodplain change. This thesis examines the spatial patterns and drivers of floodplain dynamics in the Squamish River, in southern British Columbia, Canada, between 2009 and 2019. Patterns and magnitudes of floodplain construction and erosion were identified and measured from annual remotely-sensed data from Planet.com. The area of interest was classified into water, sediment, and vegetation using a simple but effective classification based on the Normalized Difference Vegetation Index (NDVI). Change was quantified by comparing each year with the next using the Change Detection Wizard in ArcGIS Pro. The effect of three drivers of floodplain change – channel slope, valley confinement, and sediment supply – were examined with regard to rates of floodplain construction and erosion. The calculated rates of change in the Squamish River were in the range of 0.9 m – 13.4 m per year for construction and 1.7 – 15 m per year for erosion. However, no clear driver emerged as the specific cause of the floodplain change; instead, channel and floodplain dynamics seem to be driven by the complicated interplay of multiple limiting factors including channel slope, valley width, and sediment supply, as well as by human interventions and floodplain vegetation."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/122052"],"dc:language":["en","eng"],"dc:rights":["Copyright 2023 Emily E. Allen"],"dc:subject":["Floodplain","Channel Change","Gravel Bed River","Geomorphology","British Columbia","Erosion","Deposition"],"dc:title":["Spatial patterns and drivers of floodplain change in the Squamish River, a dynamic gravel bed river"],"dc:type":["text"],"thesis:degree_discipline":["Geography and GIS"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:00Z"}