Basin-scale factors in emergence of midchannel islands: a process-based morphometric analysis

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dc.contributor.authorHeidari, Naghmeh
dc.contributor.authorYagci, Oral
dc.contributor.authorAksel, Murat
dc.date.accessioned2026-01-24T12:31:01Z
dc.date.available2026-01-24T12:31:01Z
dc.date.issued2023
dc.departmentAlanya Alaaddin Keykubat Üniversitesi
dc.description.abstractMidchannel islands were conventionally considered undesirable additional hydraulic resistance to flow for many years and tended to be removed from the channels as a measure against flood. Today, it is known that these geomorphic units provide key eco-geomorphological services in the active corridor of natural waterways. This study examined the dynamics behind the occurrence mechanism of midchannel islands considering basin-scale (i.e., land use, elevation, slope, form factor, and relief) and fluvial (i.e., sediment yield) variables. Eleven drainage basins were selected as samples from the different ecoregions on Earth. Morphometric and hydrological characteristics were determined using hydrological datasets and satellite-based images by means of ArcGIS. Sediment delivery magnitudes for each examined basin were calculated based on an empirical expression. In addition, the development process of isolated midchannel islands was investigated by quantifying their planform morphometric features. The basin-scale analysis showed that the channel slope, i.e., gravity-induced factors, controls the emergence location of MCIs to a great extent, and the basin sediment yield impacts the density (i.e., number of islands) of MCIs in a unit length of the river. Furthermore, the morphometric analysis of MCIs in the individual scale revealed that when MCIs develop from the preliminary stage to the advanced stage, the contraction effect becomes more prominent which increases the streamlining effect.
dc.description.sponsorshipThis study emanates from the Ph.D. thesis of Naghmeh Heidari.
dc.description.sponsorshipThis study emanates from the Ph.D. thesis of Naghmeh Heidari.
dc.identifier.doi10.1007/s12665-023-11203-8
dc.identifier.issn1866-6280
dc.identifier.issn1866-6299
dc.identifier.issue22
dc.identifier.scopus2-s2.0-85173848560
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1007/s12665-023-11203-8
dc.identifier.urihttps://hdl.handle.net/20.500.12868/5598
dc.identifier.volume82
dc.identifier.wosWOS:001084711100003
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofEnvironmental Earth Sciences
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260121
dc.subjectBasin morphometry
dc.subjectMidchannel island
dc.subjectRiver morphology
dc.subjectLand cover
dc.subjectSpecific sediment yield
dc.subjectRiparian vegetation
dc.titleBasin-scale factors in emergence of midchannel islands: a process-based morphometric analysis
dc.typeArticle

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