Controls on facies distribution and stratigraphic preservation in the Ganges–Brahmaputra delta sequence

Goodbred, S. L.; Kuehl, Steven A.; Steckler, Michael S.; Sarker, Maminul Haque

doi:10.1016/s0037-0738(02)00184-7

Cited by 221 publications

(152 citation statements)

References 30 publications

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“…The Bengal delta is the world's largest modem deltas comprising 100,000 km 2 of riverine, floodplain and deltaic plain environment (Goodbred et al, 2003). The great rivers with their huge sediment loads, coming from the Himalayas, and tectonics interact in forming the delta.…”

Section: Setting the Scenementioning

confidence: 99%

“…al., 200 I;Mirza, 2002). On the other hand, a number of indications may be found in the literature suggesting that the 1950 Assam earthquake affected the Brahmaputra-JamunaPadma-Lower Meghna system in various ways (Krug, 1957;Goswami, 1985;Brammer, 1995;Zhou and Chen, 1998;Verghese, 1999;Sarker, et al, 2003;Goodbred et al 2003; Sarma and Phukan, 2004;Sarma, 2005). For example, Brammer (1995) suggested that the observed widening in the upstream reach of the Jamuna River during the 1970s and 1980s…”

Section: Working Hypothesismentioning

confidence: 99%

“…More recently, EGIS (2000) and Goodbred et al (2003) attempted to relate observed morphological changes, such as the widening of the Jamuna River, to the propagation of coarse sediment generated by the 1950…”

Section: Working Hypothesismentioning

confidence: 99%

“…Since the Pleistocene the Ganges has, together with the Brahmaputra, delivered enormous quantities of sediment to the Bengal Basin. These sediments have fanned the world's largest river delta with an area of about 100,000 km 2 and a sub-aquatic fan extending 3,000 km south into the Bay of Bengal (Goodbred et al, 2003) 88°°r (Halcrow et al, 1993). The remaining 10% of Bangladesh is formed by raised blocks of older, Pleistocene sediments making up the Barind Tract, the Madhupur Jungle, and the Lalmai Hills (Khan, 1991).…”

Section: Subduction Zonementioning

confidence: 99%

“…Both regional and basin tectonics have and continue to play important roles in delta forming processes (Goodbred et al, 2003). The influence of regional scale tectonics includes the steady and abundant supply of sediment to the basin due to denudation of the Himalaya and episodic inputs of additional sediment due to the destabilising effects of catastrophic seismic events.…”

Section: 3mentioning

confidence: 99%

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Morphological Response of the Brahmaputra–Padma–Lower Meghna River System to the Assam Earthquake of 1950

Sarker

Thorne

2006

Braided Rivers

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Sediment rating curves Chapter 6 Conceptual model 174 6.1 Introduction 6.2 Celerity of the disturbance in a riverbed 6.3 Changes in the Independent Variables 6.3.1 Changes in the flow regime 6.3.2 Changes in bed sediment size 6.3.3 Changes in the sediment regime 6.4 Changes in the Dependent Variables 6.4.1 Changes in bed elevation 6.4.2 Changes in width 6.4.3 Changes in braiding intensity 6.4.4 Phase lags in the observed morphological changes 65 Development of the conceptual process-response model.. 201 6.5.1 Background 201 6.5.2Adjustments in the upstream reach of the Jamuna River 202 6.5.3 Downstream reach of the

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Section: Setting the Scenementioning

confidence: 99%

Section: Working Hypothesismentioning

confidence: 99%

Section: Working Hypothesismentioning

confidence: 99%

Section: Subduction Zonementioning

confidence: 99%

Section: 3mentioning

confidence: 99%

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Morphological Response of the Brahmaputra–Padma–Lower Meghna River System to the Assam Earthquake of 1950

Sarker

Thorne

2006

Braided Rivers

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Groundwater flow dynamics and arsenic source characterization in an aquifer system of West Bengal, India

Desbarats

Koenig

Pal

et al. 2014

Water Resources Research

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Numerical groundwater flow modeling, reverse particle tracking, and environmental tracers are used to locate the source of geogenic As affecting an aquifer in West Bengal. The aquifer is hosted by point-bar sands deposited in a meandering fluvial environment. Wells tapping the aquifer exhibit As concentrations up to 531 lg/L. High-As groundwaters are recharged in ponds marking an abandoned river channel. The source of As is traced to the underlying fine-grained channel-fill sediments. Arsenic release within these sediments is accompanied by a concomitant release of Br and DOC indicating that these species may be decay products of natural organobromines codeposited along with As. Mass transfer of As to the dissolved phase and its flushing from source sediments are described using a simplified reactive solute transport model. Based on this model, a characteristic reaction time for mass transfer is estimated at 6.7 years. Average groundwater residence times in the source are estimated to have declined from 16.6 to 6.6 years with the advent of intensive irrigation pumping. The ratio of residence and reaction times, a Damk€ ohler number, has declined correspondingly from 2.49 to 0.99, indicating a shift from transport to reaction rate limited As mobilization. Greater insight into the As problem in SE Asia may be achieved by shifting the focus of field investigations from aquifers to potential contamination sources in aquitards.

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Effects of tectonic deformation and sea level on river path selection: Theory and application to the Ganges-Brahmaputra-Meghna River Delta

Reitz

Pickering

Goodbred

et al. 2015

J. Geophys. Res. Earth Surf.

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The set of active rivers of the Ganges-Brahmaputra-Meghna (GBM) Delta in Bangladesh overlies an active plate boundary that continually modifies the landscape of the delta by deformation. The response of rivers to spatially variable subsidence, from tectonic tilting or other causes, has been thought to include preferred occupation of regions of higher subsidence. In this paper, we develop further the theoretical framework for analysis of the interplay of tectonics and river dynamics, and apply this model to conditions in the GBM Delta. First, we examine the overall competition between variable subsidence and channel dynamics, and find that tilting in Bangladesh should be strong enough to influence river path selection. We then present new theory for the effect of subsidence that is spatially (not temporally) variable. We find a constant residence timescale on different parts of the delta, and differing frequencies of avulsion to these locations, and describe the effects of incision or floodplain deposition on these quantities. We present estimates of the channel residence timescale of the Jamuna (Brahmaputra) River reconstructed from the lithology, provenance, and dating of sediment cores. We apply our framework to a map of regional subsidence to predict the effects on avulsion for the Jamuna River. Comparison between our predicted (2150 years) and our stratigraphically based estimates of avulsion timescale (1800 years) shows encouraging consistency.

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Controls on facies distribution and stratigraphic preservation in the Ganges–Brahmaputra delta sequence

Cited by 221 publications

References 30 publications

Morphological Response of the Brahmaputra–Padma–Lower Meghna River System to the Assam Earthquake of 1950

Morphological Response of the Brahmaputra–Padma–Lower Meghna River System to the Assam Earthquake of 1950

Groundwater flow dynamics and arsenic source characterization in an aquifer system of West Bengal, India

Effects of tectonic deformation and sea level on river path selection: Theory and application to the Ganges-Brahmaputra-Meghna River Delta

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