Fluvial response to sea-level changes since the latest Pleistocene in the near-coastal lowland, central Kanto Plain, Japan

Ishihara, Takeshi; Sugai, Toshihiko; Hachinohe, Shoichi

doi:10.1016/j.geomorph.2011.08.022

Cited by 37 publications

(22 citation statements)

References 41 publications

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“…A) support this expectation. In addition, local tectonic uplift might be experienced by shelves on active margins (Ishihara & Sugai, ), which would induce fluvial incision (Holbrook & Schumm, ; Holbrook et al., ; Tropeano et al., ; Ishihara et al., , ; Ishihara & Sugai, ). For example, the Metaponto coastal plain in Italy (case study 77 in Table ) has been experiencing regional uplift since the Middle Pleistocene (Doglioni et al., ; Patacca & Scandone, ), at rates varying from 0·3 to 0·9 mm year −1 as estimated from dated stranded marine terraces (Cilumbriello et al., , ; Caputo et al., ; Tropeano et al., ).…”

Section: Results and Interpretationsmentioning

confidence: 99%

“…5A to C) indicate that incised-valley systems and their fills developed along active continental margins are thicker and wider, on average, than those along passive continental margins, suggesting that the tectonic context of a continental margin plays a key roleat least indirectlyin determining the geometry of nearshore incised-valley systems. Through its effects on relative sea-level change, distinct characteristics of basin physiography, climate, water discharge and sediment delivery rates, the tectonic setting appears to control the magnitude of valley incision and widening (Jain & Tandon, 2003;Vandenberghe, 2003;Ishihara et al, 2011Ishihara et al, , 2012Wohl et al, 2012;Tropeano et al, 2013;Ishihara & Sugai, 2017). Mattheus et al (2007), Mattheus & Rodriguez (2011) and Phillips (2011) claimed that valleyfill dimensions are primarily controlled by factors that act upstream, in particular by drainagebasin area, which serves as a proxy for water discharge and sediment yield.…”

Section: Controls On the Dimensions Of Incised-valley Systems And Impmentioning

confidence: 99%

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Geological controls on the geometry of incised‐valley fills: Insights from a global dataset of late‐Quaternary examples

Colombera

Mountney

2019

Sedimentology

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Incised valleys that develop due to relative sea‐level change are common features of continental shelves and coastal plains. Assessment of the factors that control the geometry of incised‐valley fills has hitherto largely relied on conceptual, experimental or numerical models, else has been grounded on case studies of individual depositional systems. Here, a database‐driven statistical analysis of 151 late‐Quaternary incised‐valley fills has been performed, the aim being to investigate the geological controls on their geometry. Results of this analysis have been interpreted with consideration of the role of different processes in determining the geometry of incised‐valley fills through their effect on the degree and rate of river incision, and on river size and mobility. The studied incised‐valley fills developed along active margins are thicker and wider, on average, than those along passive margins, suggesting that tectonic setting exerts a control on the geometry of incised‐valley fills, probably through effects on relative sea‐level change and river behaviour, and in relation to distinct characteristics of basin physiography, water discharge and modes of sediment delivery. Valley‐fill geometry is positively correlated with the associated drainage‐basin size, confirming the dominant role of water discharge. Climate is also inferred to exert a potential control on valley‐fill dimensions, possibly through modulations of temperature, peak precipitation, vegetation and permafrost, which would in turn affect water discharge, rates of sediment supply and valley‐margin stability. Shelves with slope breaks that are currently deeper than 120 m contain incised‐valley fills that are thicker and wider, on average, than those hosted on shelves with breaks shallower than 120 m. No correlation exists between valley‐fill thickness and present‐day coastal‐prism convexity, which is measured as the difference in gradient between lower coastal plains and inner shelves. These findings challenge some concepts embedded in sequence stratigraphic thinking, and have significant implications for analysis and improved understanding of ‘source to sink’ sediment route‐ways, and for attempting predictions of the occurrence and characteristics of hydrocarbon reservoirs.

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Section: Results and Interpretationsmentioning

confidence: 99%

Section: Controls On the Dimensions Of Incised-valley Systems And Impmentioning

confidence: 99%

Geological controls on the geometry of incised‐valley fills: Insights from a global dataset of late‐Quaternary examples

Colombera

Mountney

2019

Sedimentology

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“…Although the HYDROTREND numerical simulation indicated different sediment discharges of the Tone River at 11 ka and 7 ka, the results of the present study, taken together with those of Ishihara et al . (), indicate that a threshold rate of sea‐level rise of 4 to 7 mm yr −1 determined whether channel movement was dominantly vertical or lateral, regardless of the sediment discharge of the Tone River.…”

Section: Discussionmentioning

confidence: 95%

“…Geological and modern analogue studies have revealed that sea-level changes affect the stacking patterns of fluvial systems (Blum & T€ ornqvist, 2000). In particular, fluvial evolution models derived from modern incised-valley fills beneath the Colorado River (Aslan & Blum, 1999), Rhine-Meuse delta (T€ ornqvist, 1993) and Tone River (Ishihara et al, 2012) show that channel stacking patterns are characterized by vertical aggradation during periods of rapid sealevel rise and lateral migration when the sealevel is rising slowly. However, the lower rate of sea-level rise at which the channel stacking pattern begins to change from vertical aggradation to lateral migration remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Millennial‐scale stratigraphy of a tide‐dominated incised valley during the last 14 kyr: Spatial and quantitative reconstruction in the Tokyo Lowland, central Japan

et al. 2015

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Spatial and quantitative analysis of infilling processes of the tide-dominated incised valleys beneath the Tokyo Lowland during the last 14 kyr was undertaken by using data from 18 sediment cores, 467 radiocarbon dates and 6100 borehole logs. The post-Last Glacial Maximum valley fills consist of braided river, meandering river, estuary, spit and delta systems in ascending order. The boundary between the estuary and delta systems is regarded as the maximum flooding surface. The maximum flooding surface beneath the Tokyo Lowland is dated at 8 ka in the Arakawa Valley and 7 ka in the Nakagawa Valley. This age difference is due to the migration of the Tone River from the Arakawa Valley to the Nakagawa Valley at 5 ka, and suggests that the widely held view that the global initiation of deltas coincided with the abrupt rise of sea-level at 9 to 8 ka is true only where there has been steady sediment supply from major rivers. The meandering river system is dominated by sheet-like sands that were deposited during lateral migration of channels during the Younger Dryas and isolated vertical sands within muds that reflect vertical aggradation of channels before and after the Younger Dryas. The transition between these channel geometries is controlled by a threshold sea-level rise of 4 to 7 mm yr À1 . Before migration of the Tone River at 5 ka, the tide-dominated bay in the Nakagawa Valley was filled by upward-fining laterally accreting muds. The muds accreted from the margin to the axis of the bay. Such lateral accretion of suspended particles derived from outside the bay has been documented in other tide-dominated coastal environments and is probably common in other similar settings. After the migration of the Tone River, the bay was filled by upward-coarsening deltaic sediments.

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“…As a result, the CPs of these rivers are thick. The Kinu River CP is thicker in the downstream region of the Ryugasaki Lowland (Kaizuka 1987), whereas the Ara River CP is thicker in upstream Menuma Lowland (Hirai 1983;Ishihara et al 2012;Fig. 5.5b); both lowlands are known as local tectonic subsidence centers.…”

Section: Geometric Character Of Coastal Prisms In Japanmentioning

confidence: 99%

Natural Disaster and Coastal Geomorphology

Haruyama¹,

Sugai²

2016

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Fluvial response to sea-level changes since the latest Pleistocene in the near-coastal lowland, central Kanto Plain, Japan

Cited by 37 publications

References 41 publications

Geological controls on the geometry of incised‐valley fills: Insights from a global dataset of late‐Quaternary examples

Geological controls on the geometry of incised‐valley fills: Insights from a global dataset of late‐Quaternary examples

Millennial‐scale stratigraphy of a tide‐dominated incised valley during the last 14 kyr: Spatial and quantitative reconstruction in the Tokyo Lowland, central Japan

Natural Disaster and Coastal Geomorphology

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