Reply to 'Tidal river management in Bangladesh'

Auerbach, L. Wallace; Goodbred, S. L.; Mondal, D. R.; Wilson, Carol; Ahmed, Kazi Rifat; Roy, Kushal; Steckler, Michael S.; Small, Christopher; Gilligan, Jonathan M.; Ackerly, Brooke A.

doi:10.1038/nclimate2620

Cited by 11 publications

(12 citation statements)

References 2 publications

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“…Auerbach et al (2015b) state that suitable TRM sites should lie more than 50 km inland of the Sundarban (mangrove forests in Bangladesh) regions. Highly saline zones are unsuitable for TRM sites as sandy and saline sediment precludes agriculture.…”

Section: Discussionmentioning

confidence: 99%

“…However, TRM implementation has proved to be challenging due to institutional limitations, mismanagement and social conflicts (Auerbach et al, 2015b;Rezaie et al, 2013) and has lacked interdisciplinary practice. Addressing waterlogging and flood risks, Auerbach et al (2015a), for example, recommend a physical-based assessment of the impacts of polder construction on sediment deposition and distribution and suggest that systematically breaching embankment sections can facilitate sediment delivery and elevation recovery.…”

Section: Introductionmentioning

confidence: 99%

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Tidal river management in the south west Ganges-Brahmaputra delta in Bangladesh: Moving towards a transdisciplinary approach?

Gain

Benson

Rahman

et al. 2017

Environmental Science & Policy

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Due to both natural and anthropogenic forces, the south west part of the Ganges-Brahmaputra coastal area is facing diverse problems such as waterlogging, salinity, and loss of biodiversity. In order to address these challenges, local people have identified 'tidal river management (TRM)' as a comprehensive approach for sustainably managing this part of the GangesBrahmaputra Basin. However, due to institutional limitations, mismanagement and social conflicts, application of the TRM approach is not straightforward. In order to identify existing implementation barriers and to effectively apply the TRM approach, a transdisciplinary approach is examined for its potential to inform the re-shaping of TRM governing values and actions. It is argued that a thorough application of a transdisciplinary framework is essential, supported by the active involvement of key agencies and local stakeholders. The proposed transdisciplinary framework can potentially be applied to TRM projects for solving waterlogging and associated problems in order to achieve greater sustainability of the area.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tidal river management in the south west Ganges-Brahmaputra delta in Bangladesh: Moving towards a transdisciplinary approach?

Gain

Benson

Rahman

et al. 2017

Environmental Science & Policy

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“…Within the delta, ood defences and polders also exclude sedimentation except in extreme oods. 60 Using controlled sedimentation in polders to build elevation as sea levels rise is now recognised as a possible, but untested response in Bangladesh, 61 as well as in other vulnerable deltas across the globe. Hence, further research on all these issues is urgently required, including rening and improving estimates of present and future sediment uxes to the GBM delta.…”

Section: Impact Of Climate Change On Water and Sediment Uxmentioning

confidence: 99%

A first look at the influence of anthropogenic climate change on the future delivery of fluvial sediment to the Ganges–Brahmaputra–Meghna delta

Darby

Dunn

Nicholls

et al. 2015

Environ. Sci.: Processes Impacts

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We employ a climate-driven hydrological water balance and sediment transport model (HydroTrend) to simulate future climate-driven sediment loads flowing into the Ganges-Brahmaputra-Meghna (GBM) mega-delta. The model was parameterised using high-quality topographic data and forced with daily temperature and precipitation data obtained from downscaled Regional Climate Model (RCM) simulations for the period 1971-2100. Three perturbed RCM model runs were selected to quantify the potential range of future climate conditions associated with the SRES A1B scenario. Fluvial sediment delivery rates to the GBM delta associated with these climate data sets are projected to increase under the influence of anthropogenic climate change, albeit with the magnitude of the increase varying across the two catchments. Of the two study basins, the Brahmaputra's fluvial sediment load is predicted to be more sensitive to future climate change. Specifically, by the middle part of the 21(st) century, our model results suggest that sediment loads increase (relative to the 1981-2000 baseline period) over a range of between 16% and 18% (depending on climate model run) for the Ganges, but by between 25% and 28% for the Brahmaputra. The simulated increase in sediment flux emanating from the two catchments further increases towards the end of the 21(st) century, reaching between 34% and 37% for the Ganges and between 52% and 60% for the Brahmaputra by the 2090s. The variability in these changes across the three climate change simulations is small compared to the changes, suggesting they represent a significant increase. The new data obtained in this study offer the first estimate of whether and how anthropogenic climate change may affect the delivery of fluvial sediment to the GBM delta, informing assessments of the future sustainability and resilience of one of the world's most vulnerable mega-deltas. Specifically, such significant increases in future sediment loads could increase the resilience of the delta to sea-level rise by giving greater potential for vertical accretion. However, these increased sediment fluxes may not be realised due to uncertainties in the monsoon related response to climate change or other human-induced changes in the catchment: this is a subject for further research.

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“…For indicator selection and data collection, we adopted a mixed method approach primarily involving a qualitative case study design based on four workshops, stakeholder interviews, and site visits along with quantitative data from secondary sources and published articles (Auerbach et al 2015, Hossain et al 2015, Mutahara et al 2018, van Staveren et al 2017, Gain et al, 2017a, Masud et al 2018. Field surveys (workshops, interviews and site visits) were conducted during May-November, 2018.…”

Section: Data Collectionmentioning

confidence: 99%

“…Reflecting on the experience of traditional water management practices by zamindars, local people inundated floodplains temporarily in the 1990s by breaching or cutting away embankments (or dikes) to allow tidal flows in the floodplain. This approach is termed 'tidal river management' (TRM) (Auerbach et al 2015, Hossain et al 2015. TRM has high potential for achieving sustainability of the coastal floodplains in the Ganges-Brahmaputra delta.…”

Section: Introductionmentioning

confidence: 99%

Exploring human-nature interaction on the coastal floodplain in the Ganges-Brahmaputra delta through the lens of Ostrom’s social-ecological systems framework

Gain

Ashik‐Ur‐Rahman

Vafeidis

2019

Environ. Res. Commun.

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This study diagnoses temporal and spatial variations in the performance of different social-ecological systems (SES) in coastal floodplain management in the Ganges-Brahmaputra delta. We go beyond common pool resource management problems and address the management of local public goods. In the assessment, we consider recent developments in the framework initially developed by Elinor Ostrom. The main variables of the framework that we use are resource systems, the environment, the governance system and actors. The focal SES is defined based on guiding questions relating to the definition of the key problem, system boundaries, and action situations. According to our results, the performance of resource systems and the environment deteriorated in 1960-79 compared to the performance prior to 1960. The condition reached a low point during 1980-1999 but improved slightly after 1999. The horizontal network structure of local governance was active until 1960. Due to the introduction of the 'tidal river management' approach in the 90 s, the performance of the resource system and the environment has slightly improved, as has the involvement of government and nongovernment organizations. Our results also show that overall SES performance is comparatively better

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Reply to 'Tidal river management in Bangladesh'

Cited by 11 publications

References 2 publications

Tidal river management in the south west Ganges-Brahmaputra delta in Bangladesh: Moving towards a transdisciplinary approach?

Tidal river management in the south west Ganges-Brahmaputra delta in Bangladesh: Moving towards a transdisciplinary approach?

A first look at the influence of anthropogenic climate change on the future delivery of fluvial sediment to the Ganges–Brahmaputra–Meghna delta

Exploring human-nature interaction on the coastal floodplain in the Ganges-Brahmaputra delta through the lens of Ostrom’s social-ecological systems framework

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