FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4322004968> ?p ?o ?g. }

• W4322004968 abstract "The west Coast of central Sumatra is situated above the Sumatra subduction zone and is characterized by short (< 100 km) and very steep (> 20&#176;) bed rock channels draining the volcanic arc towards the Indian Ocean. Incision and fluvial adaptation of these catchments are commonly attributed to tectonic uplift along the subduction zone and emplacement of magma bodies within the volcanic arc. Recent recognition of a regional sea-level high stand between 4,500 to 5,000 years ago and the low shelf depth of ~70 m below sea level, may indicate that base-level fluctuations had a stronger control on river network dynamics than previously thought. Here, we explore the impact of these processes on the fluvial morphology and the incision history of 31 catchments draining the volcanic arc of west-central Sumatra. Landscape evolution simulations using PyBadlands, geomorphic metrics of the normalized-steepness index, knickpoint detection and c-analysis derived from 30 m SRTM-satellite data demonstrate that the morphometric response of smaller catchments (drainage area: < 500 km2) is different from that of larger catchments (drainage area: > 500 km2). The reduction in overall drainage area due to the last postglacial sea-level rise forced smaller catchments to oversteepen to adjust to the new conditions. Instead, larger catchments responded by upstream drainage area expansion and capture of previously eastward flowing rivers, thus maintaining an overall lower gradient. Furthermore, the mid-Holocene high-stand and subsequent sea-level drop resulted in a major regional base-level fall and creation of a knickzone along the entire West Coast of Sumatra that is currently migrating up the fluvial network and is located at an elevation of around 200 m. Our results imply that (1) the tempo of fluvial incision between catchments along the West Coast of Sumatra may be out of phase with the uplift of the volcanic arc; (2) the drainage area reduction due to postglacial sea-level rise controlled fluvial catchment evolution; and (3) we observe a catchment size depended threshold at which catchments either oversteepen or incise headward to adjust for drainage area loss. This response should be applicable to all natural occurring fluvial bedrock channels that experience drainage area loss and should be modulated by runoff and erodibility. The process is exceptionally well visible in Sumatra as there exists no orographic rainfall gradient along the mountain front.&#160;Keywords: Postglacial sea-level rise, fluvial geomorphology, landscape evolution, erosion, subduction zone, SE Asia" @default.
• W4322004968 created "2023-02-26" @default.
• W4322004968 creator A5030475662 @default.
• W4322004968 creator A5041872097 @default.
• W4322004968 creator A5076884858 @default.
• W4322004968 creator A5079132474 @default.
• W4322004968 date "2023-05-15" @default.
• W4322004968 modified "2023-09-27" @default.
• W4322004968 title "Last postglacial sea-level fluctuations control fluvial morphodynamics along the West Coast of Sumatra, Indonesia" @default.
• W4322004968 doi "https://doi.org/10.5194/egusphere-egu23-8352" @default.
• W4322004968 hasPublicationYear "2023" @default.
• W4322004968 type Work @default.
• W4322004968 citedByCount "0" @default.
• W4322004968 crossrefType "posted-content" @default.
• W4322004968 hasAuthorship W4322004968A5030475662 @default.
• W4322004968 hasAuthorship W4322004968A5041872097 @default.
• W4322004968 hasAuthorship W4322004968A5076884858 @default.
• W4322004968 hasAuthorship W4322004968A5079132474 @default.
• W4322004968 hasConcept C109007969 @default.
• W4322004968 hasConcept C111368507 @default.
• W4322004968 hasConcept C112959462 @default.
• W4322004968 hasConcept C114793014 @default.
• W4322004968 hasConcept C120806208 @default.
• W4322004968 hasConcept C127313418 @default.
• W4322004968 hasConcept C140345934 @default.
• W4322004968 hasConcept C151730666 @default.
• W4322004968 hasConcept C16156107 @default.
• W4322004968 hasConcept C2816523 @default.
• W4322004968 hasConcept C58097730 @default.
• W4322004968 hasConcept C65589250 @default.
• W4322004968 hasConcept C74501621 @default.
• W4322004968 hasConcept C77928131 @default.
• W4322004968 hasConceptScore W4322004968C109007969 @default.
• W4322004968 hasConceptScore W4322004968C111368507 @default.
• W4322004968 hasConceptScore W4322004968C112959462 @default.
• W4322004968 hasConceptScore W4322004968C114793014 @default.
• W4322004968 hasConceptScore W4322004968C120806208 @default.
• W4322004968 hasConceptScore W4322004968C127313418 @default.
• W4322004968 hasConceptScore W4322004968C140345934 @default.
• W4322004968 hasConceptScore W4322004968C151730666 @default.
• W4322004968 hasConceptScore W4322004968C16156107 @default.
• W4322004968 hasConceptScore W4322004968C2816523 @default.
• W4322004968 hasConceptScore W4322004968C58097730 @default.
• W4322004968 hasConceptScore W4322004968C65589250 @default.
• W4322004968 hasConceptScore W4322004968C74501621 @default.
• W4322004968 hasConceptScore W4322004968C77928131 @default.
• W4322004968 hasLocation W43220049681 @default.
• W4322004968 hasOpenAccess W4322004968 @default.
• W4322004968 hasPrimaryLocation W43220049681 @default.
• W4322004968 hasRelatedWork W1986026954 @default.
• W4322004968 hasRelatedWork W1992776973 @default.
• W4322004968 hasRelatedWork W2002729702 @default.
• W4322004968 hasRelatedWork W2016215358 @default.
• W4322004968 hasRelatedWork W2161430494 @default.
• W4322004968 hasRelatedWork W2189095163 @default.
• W4322004968 hasRelatedWork W2387551409 @default.
• W4322004968 hasRelatedWork W2393371679 @default.
• W4322004968 hasRelatedWork W3041155535 @default.
• W4322004968 hasRelatedWork W3203429227 @default.
• W4322004968 isParatext "false" @default.
• W4322004968 isRetracted "false" @default.
• W4322004968 workType "article" @default.