Channel migration zone mapping of the River Ganga in the Diara surrounding region of Eastern India

Mukherjee, Kaustuv; Pal, Swades

doi:10.1007/s10668-017-9984-y

Cited by 47 publications

(9 citation statements)

References 20 publications

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“…In the districts of Malda and Murshidabad, the Ganga’s shifting path has been resulting in large-scale disaster in terms of floods and bank erosion. Scholars such as Mukherjee and Pal ( 2017 ), Mondal et al ( 2016 ), Mitra ( 2015 ), Hossain ( 2013 ), Saha ( 2012 ), Thakur et al ( 2011 ), and Rudra ( 2010 ) have studied the shifting courses of the Ganga River over time.…”

Section: Resultsmentioning

confidence: 99%

“…Scholars such as Mondal et al ( 2016 ), Islam and Guchhait ( 2015 ), and Thakur et al ( 2011 ) have looked into the causes of floods and river-bank erosion and found that there are numerous factors that impact floods and bank erosion, such as topography, geomorphology, drainage, and rainfall variability, channel width-depth ratio, and channel slope. River-bank erosion is one of the most ubiquitous phenomena, especially in Malda district, which is located along the left bank of the River Ganga (Mitra, 2015 ; Mondal et al, 2016 ; Mukherjee & Pal, 2017 ; Saha, 2012 ), where the river’s powerful current hits the bank before taking a ninety degree turn towards the south. River depth along with water carrying capacity of the Ganga is gradually decreasing due to changes in land-use pattern in the upper catchment area.…”

Section: Introductionmentioning

confidence: 99%

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Impact of floods and river-bank erosion on the riverine people in Manikchak Block of Malda District, West Bengal

Das

Samanta

2022

Environ Dev Sustain

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Floods and river-bank erosion are the most frequent natural hazards in India, specifically in the deltaic regions. In West Bengal, floods and river-bank erosion predominantly affect Malda district as it is located in the moribund part of the Bengal delta. This article studies the recent trend of shifting course of the River Ganga and the effects of floods and consequent river-bank erosion on livelihoods of the residents of chars [The chars (called Diara in the upper reaches of the Gangetic plains) are virgin, low-lying river islands and sand bars occurring in the plains, particularly the deltaic parts of rivers (Lahiri-Dutt and Samanta, South Asia: J South Asia Stud 30:327–350, 2007 ).] and river-bank areas of Manikchak block in the Malda district. Around 300 sample households were selected by random stratified sampling technique from four gram panchayats of Manikchak block. Both primary and secondary data have been used. After analysing satellite images from the year 1973 to 2018, it has been observed that the River Ganga continues to shift eastwards and is eroding villages one after another. Inhabitants face multidimensional obstacles to run their households. Large numbers of people are displaced every year due to loss of land. Failure in facilitating the required assistance in the form of alternative spaces for resettlement and other disaster-mitigating public support systems against these hazards would make it impossible for the deplorable condition of the vulnerable people to improve.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of floods and river-bank erosion on the riverine people in Manikchak Block of Malda District, West Bengal

Das

Samanta

2022

Environ Dev Sustain

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“…The major rivers in the district are Ganga, Punarbhaba, Mahananda, Pagla, Kalindri, Tangon, Fulahar etc. The river Ganga has enough evidence of lateral migration (Mukherjee and Pal, 2017). With the shifting of river course, it creates numerous ox-bow lake, cut-off channels, beels, etc.…”

Section: Study Areamentioning

confidence: 99%

Evaluation of wetland ecosystem health using geospatial technology: evidence from the lower Gangetic flood plain in India

Das¹,

Bhunia

Bera

et al. 2021

Environ Sci Pollut Res

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The lower Gangetic ood plain of West Bengal occupies diversi ed riverine and oodplain wetlands.These wetlands played a signi cant role maintain ecosystem health and supports for human wellbeing. This paper presents the health of wetland ecosystem by comprising the wetland ecosystem health index (WEHI) in 2011 and 2018 at block level of Malda district, as a part of lower Gangetioc ood plain using pressure -state -response model (PSR model) and AHP method. A total number of six Landsat satellite images and statistical census data were used to determine the wetland. Wetlands are classi ed as very healthy, healthy, sub-healthy, unhealthy and sick category on the basis of wetland ecosystem health index score. Results showed the health of wetland ecosystem has slightly decreased from 2011 to 2018.13.33% of blocks are fall under sick category in 2011. 26.67% block are comes under very healthy category in 2011 but it decrease to 20% in 2018. The heath of wetland ecosystem in Harischandrapur -II, Ratua-II, Maldah (Old), English Bazar, Bamongola, Habibpur, Chanchal-I and Kaliachak -II blocks are degrading from 2011 to 2018. This may be attributed to the increasing urbanization rate and associated growth of infrastructure. Developing local level institutions is useful measures to manage wetland resource; and protect biodiversity should be guided by the Government organization and NGOs for its mitigation measure. HighlightsLandsat ETM and OLI satellite images, census data and Google Earth data were accumulated to explore the wetland ecosystem health using open source software.Block wise wetland ecosystem health status of lower Gangetic ood plain region were assess in the year 2011 and 2018.The present study shows that, average wetland ecosystem health (WEH) score was decline from 2011 to 2018.

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“…Good number of mega-avulsion events can be found along the Ganga river in India and Padma river in India and Bangladesh. Mukherjee and Pal (2018) and Rudra (2014) reported some of the prominent historical avulsion channels, e.g., river Pagla, Kalindri, Adi Ganga from river Ganga in Diara region of West Bengal. In the Himalayan foreland basin, the process of channel avulsion has its own influence in the formation and maturation of the alluvial fans, i.e.…”

Section: Introductionmentioning

confidence: 99%

Avulsion potential modeling using integrated Fuzzy-AHP in lower catchment of Chel river of North Bengal, India

Ghosh¹,

Sarkar

2021

Model. Earth Syst. Environ.

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The paper aims to determine the potential avulsion zones on the piedmont segment of the Chel river basin. A total of 12 hydro-geomorphic causative variables have been selected considering the river basin's present geomorphological and hydrological characteristics. The analysis focused on spatial modeling considering Multi-Criteria Evaluation (MCE) technique. The paper's main contribution is to identify the active avulsion zones on the piedmont of Darjeeling Himalaya triggered by high monsoon rainfall (5479.3 mm maximum annual average). The model's input comes from high-resolution Digital Elevation Model (DEM) based on interpolated rasters, proximity rasters, and rainfall raster. The raster overlay inputs have been fuzzified to scale down within 0-1 and produce the final factor weights. The Analytical Hierarchic Process (AHP) checks the priorities judged by each variable's pair wise relative importance as a part of MCE. Finally, the model indicates that suitable sites on a continuous scale of suitability range between 0 and 1. The rainfall raster gets the highest weightage in the AHP priority scoring. The model correctly classified 85.7% of sites suitable to avulsion, and it has also been proven from the recent (2017-2020) field photographs. The Fuzzy-MCE technique has revealed the role of high rainfall in triggering avulsion on the piedmont surface. The final composite layer indicates the mountain outlet (junction of Chel, Manzing and Fagu Khola) as the most potential site for avulsion.

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Channel migration zone mapping of the River Ganga in the Diara surrounding region of Eastern India

Cited by 47 publications

References 20 publications

Impact of floods and river-bank erosion on the riverine people in Manikchak Block of Malda District, West Bengal

Impact of floods and river-bank erosion on the riverine people in Manikchak Block of Malda District, West Bengal

Evaluation of wetland ecosystem health using geospatial technology: evidence from the lower Gangetic flood plain in India

Avulsion potential modeling using integrated Fuzzy-AHP in lower catchment of Chel river of North Bengal, India

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