Flood Dynamics, River Erosion, and Vulnerability in the Catchment of Dharla and Dudhkumar Rivers in Bangladesh

Rahman, Md. Rejaur; Sweet, Sabbir Ahmed; Islam, Aminul

doi:10.1007/978-3-031-21086-0_5

Cited by 2 publications

(2 citation statements)

References 37 publications

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“…The characteristics of river channel patterns, categorized as straight, meandering and braided patterns, are largely determined by a number of geomorphological variables including the slope, discharge and bed material size [17][18][19]. Several scholars have classified channel patterns (the bird's eye view of channel configuration) of both the Ganges and Brahamaputra-Jamuna Rivers as braided channels as they are divided into multiple channels by the existence of chars (bars or islands), and these separated channels afterward converge as well as get divided again [9,[20][21]. The primary characteristics of the braided rivers include highly variable discharge, bed-load abundance, easily erodible banks, steep slopes, and mid-channel bars, shoals and islands (charland) [22].…”

Section: River Channel Patterns and Charland Formationmentioning

confidence: 99%

Bengal Delta, Charland (Mid-channel Island) Formation, and Riparian Hazards: A Study of Dynamic Geophysical and Human Adaptations

Haque¹,

Jakariya²

2023

Preprint

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This study posits that for appropriately explaining the complex charland (mid-channel island) processes and formulating policy and planning measures, a comprehensive understanding of the dynamic characteristics of the geomorphological, ecological, and human systems holistically is essential. This is also valid for the territorial and maritime areas of Bangladesh. The objectives of this study are: (i) to analyze the salient features and characteristics of the geomorphological and riparian systems of the Bengal Delta; (ii) to analyze the evolutionary discourse of the legal systems concerning eroded (diluvion) and accreted (alluvion) land in Bangladesh; and (iii) to assess characteristics of coping and adaptation strategies of the charland inhabitants. The findings reveal that the delta-building processes, characterized by the dynamic shifts of river channels, and erosion and accretion of charlands have made the land and water systems of the territory very dynamic and unstable – resulting in consistent displacement of settlers and serious deterioration of their socioeconomic status. The historical evolution of land laws and regulations concerning the accreted land favoured vested interests. As no effective institutional framework and structure presently exists in Bangladesh for resettlement planning, formulation of a comprehensive national resettlement policy is therefore urgently needed.

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Section: River Channel Patterns and Charland Formationmentioning

confidence: 99%

Bengal Delta, Charland (Mid-channel Island) Formation, and Riparian Hazards: A Study of Dynamic Geophysical and Human Adaptations

Haque¹,

Jakariya²

2023

Preprint

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“…Several scholars have classified both the Ganges and Brahamaputra-Jamuna Rivers as having braided channel patterns (based on a bird's eye view of channel configuration), as the presence of chars divides these rivers into multiple channels, which alternately converge and diverge over the river's length [11,14,24]. The primary characteristics of braided channels include highly variable discharge, bed-load abundance, easily erodible banks, steep slopes, and mid-channel bars, shoals, and islands (charland) [25]. Generally, these islands are seasonally unstable.…”

Section: River Channel Patterns and Charland Formationmentioning

confidence: 99%

Bengal Delta, Charland Formation, and Riparian Hazards: Why Is a Flexible Planning Approach Needed for Deltaic Systems?

Haque

Jakariya

2023

Water

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A comprehensive understanding of the dynamic characteristics of geomorphological, ecological, and human systems is essential to explaining complex charland (mid-channel island) processes and crafting and implementing policy measures. This work demonstrates that the characteristics and outcomes of riparian hazards are determined by the interactive dynamics between hydrogeology and human conditions, which constitutes a novel contribution to the literature in this research area. We further contend that such dynamic social-ecological systems demand a flexible, adaptive management and planning approach. The present research has three key interdisciplinary objectives: (i) to analyze the salient features and characteristics of the geomorphological and riparian systems of the Bengal Delta; (ii) to analyze the evolutionary discourse of the legal systems concerning eroded (diluvion) and accreted (alluvion) land in Bangladesh; and (iii) to assess the characteristics of the coping and adaptation strategies employed by charland inhabitants. The findings of this research reveal that delta-building processes, which are characterized by dynamic shifts in the river channels, along with the erosion and accretion of charlands have made Bangladesh’s land and water systems very dynamic and unstable. The destabilization of these systems increases the inhabitants’ vulnerability to riparian hazards, which consistently results in the displacement of settlers and, consequently, a serious deterioration in their socioeconomic status. At present, Bangladesh does not have an effective institutional framework and structure for resettlement planning; therefore, the formulation of a comprehensive national resettlement policy with adequate flexibility to adapt to changing scenarios is urgently needed.

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Flood Dynamics, River Erosion, and Vulnerability in the Catchment of Dharla and Dudhkumar Rivers in Bangladesh

Cited by 2 publications

References 37 publications

Bengal Delta, Charland (Mid-channel Island) Formation, and Riparian Hazards: A Study of Dynamic Geophysical and Human Adaptations

Bengal Delta, Charland (Mid-channel Island) Formation, and Riparian Hazards: A Study of Dynamic Geophysical and Human Adaptations

Bengal Delta, Charland Formation, and Riparian Hazards: Why Is a Flexible Planning Approach Needed for Deltaic Systems?

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