Importance of flood-plain sedimentation for river sediment budgets and terrigenous input to the oceans; insights from the Brahmaputra-Jamuna River

Recent authors have suggested that a significant proportion of the worldwide terrigenous sediment budget is trapped landward of the river-ocean boundary in high-load, tectonically active basins. To test this idea, modern flood-plain sediment accumulation rates were determined along a 110 km reach of...

Full description

Saved in:
Bibliographic Details
Published in:Geology (Boulder) 1998-02, Vol.26 (2), p.175-178
Main Authors: Allison, M. A, Kuehl, S. A, Martin, T. C, Hassan, A
Format: Article
Language:English
Subjects:
absolute age
alkali metals
Asia
Bangladesh
bedload
Brahmaputra River
braided streams
Cenozoic
cesium
cores
Cs-137
dates
floodplains
Floods
fluvial features
fluvial sedimentation
Freshwater
geographic information systems
Geology
Holocene
Hydrogeology
hydrology
Indian Peninsula
information systems
isotopes
Jamuna River
Marine
metals
modern
Quaternary
radioactive isotopes
Rivers
rivers and streams
sedimentation
sedimentation rates
Sediments
streams
terrigenous materials
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Recent authors have suggested that a significant proportion of the worldwide terrigenous sediment budget is trapped landward of the river-ocean boundary in high-load, tectonically active basins. To test this idea, modern flood-plain sediment accumulation rates were determined along a 110 km reach of the Brahmaputra (locally Jamuna) River using 137Cs geochronology of sediment cores and geographic information system (GIS) extrapolation to adjacent areas. 137Cs accumulation rates decrease exponentially away from the channel, from >4 cm/yr on the natural levees to
ISSN:0091-7613
1943-2682
DOI:10.1130/0091-7613(1998)026<0175:IOFPSF>2.3.CO;2