scholarly journals Erratum for “What Controls the Transition from Confined to Unconfined Flow? Analysis of Hydraulics in a Coastal River Delta” by Matthew Hiatt and Paola Passalacqua

2018 ◽  
Vol 144 (1) ◽  
pp. 08217004
Author(s):  
Matthew Hiatt ◽  
Paola Passalacqua
2018 ◽  
Vol 54 (3) ◽  
pp. 2212-2232 ◽  
Author(s):  
Matthew Hiatt ◽  
Edward Castañeda‐Moya ◽  
Robert Twilley ◽  
Ben R. Hodges ◽  
Paola Passalacqua

2016 ◽  
Vol 2 (5) ◽  
pp. e1501768 ◽  
Author(s):  
Vamsi Ganti ◽  
Austin J. Chadwick ◽  
Hima J. Hassenruck-Gudipati ◽  
Brian M. Fuller ◽  
Michael P. Lamb

River deltas worldwide are currently under threat of drowning and destruction by sea-level rise, subsidence, and oceanic storms, highlighting the need to quantify their growth processes. Deltas are built through construction of sediment lobes, and emerging theories suggest that the size of delta lobes scales with backwater hydrodynamics, but these ideas are difficult to test on natural deltas that evolve slowly. We show results of the first laboratory delta built through successive deposition of lobes that maintain a constant size. We show that the characteristic size of delta lobes emerges because of a preferential avulsion node—the location where the river course periodically and abruptly shifts—that remains fixed spatially relative to the prograding shoreline. The preferential avulsion node in our experiments is a consequence of multiple river floods and Froude-subcritical flows that produce persistent nonuniform flows and a peak in net channel deposition within the backwater zone of the coastal river. In contrast, experimental deltas without multiple floods produce flows with uniform velocities and delta lobes that lack a characteristic size. Results have broad applications to sustainable management of deltas and for decoding their stratigraphic record on Earth and Mars.


2019 ◽  
Vol 11 (23) ◽  
pp. 6655 ◽  
Author(s):  
Pramod K. Singh ◽  
Konstantinos Papageorgiou ◽  
Harpalsinh Chudasama ◽  
Elpiniki I. Papageorgiou

The Sundarbans is the world’s largest coastal river delta and the largest uninterrupted mangrove ecosystem. A complex socio-ecological setting, coupled with disproportionately high climate-change exposure and severe ecological and social vulnerabilities, has turned it into a climate hotspot requiring well-designed adaptation interventions. We have used the fuzzy cognitive maps (FCM)-based approach to elicit and integrate stakeholders’ perceptions regarding current climate forcing, consequent impacts, and efficacy of the existing adaptation measures. We have also undertaken climate modelling to ascertain long-term future trends of climate forcing. FCM-based simulations reveal that while existing adaptation practices provide resilience to an extent, they are grossly inadequate in the context of providing future resilience. Even well-planned adaptations may not be entirely transformative in such a fragile ecosystem. It was through FCM-based simulations that we realised that a coastal river delta in a developing nation merits special attention for climate-resilient adaptation planning and execution. Measures that are likely to enhance adaptive capabilities of the local communities include those involving gender-responsive and adaptive governance, human resource capacity building, commitments of global communities for adaptation financing, education and awareness programmes, and embedding indigenous and local knowledge into decision making.


1963 ◽  
Vol 42 (12) ◽  
pp. 742 ◽  
Author(s):  
John L. Burbidge

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