Impact of confluence on hydrological and morphological characters of the trunk stream: a study on the Manu River of North-east India

Debnath, Jatan; Das, Nabanita; Sharma, Rakhal; Ahmed, Istak

doi:10.1007/s12665-019-8190-7

Cited by 9 publications

(4 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The land use/land cover classification shows that there is an increase in the built-up area and a decrease in an agricultural area. The channel migration directly affects the land use and this change in land-use change thereby affects the floodplain inhabitants (3,35). The present study of the geomorphological instabilities of the area highlights the vulnerability of the people residing near the Subansiri river.…”

Section: Discussionmentioning

confidence: 78%

Channel Migration and Consequential Land Use Land Cover Changes of Subansiri River, Assam, North-Eastern India

Acharjee

Das²,

Shekhar³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Subansiri River is the largest tributary of the Brahmaputra River running through the Indian states of Assam and Arunachal Pradesh, and Tibet, the Autonomous Region of China. The Subansiri River is 442 km long with a drainage basin of 32,640 km2 and it contributes approximately 7.92% of the Brahmaputra’s total flow. Sequential Channel shifting has been witnessed as the most important characteristic of the Subansiri River of Assam. The detailed study on channel migration of the present course of the Subansiri River through the upper floodplain of Brahmaputra valley indicates that the area is under active erosion for a long time. Therefore, an attempt has been made to understand the relationship between the rate of channel migration and successive land use/land cover changes in its surrounding floodplain area. The Support Vector Machine (SVM) and the Artificial Neural Network (ANN) algorithms are applied on Landsat images of the years 1973, 1988, 2001, and 2017 for generating land use/land cover maps through supervised classification technique. The overall accuracy of the land use/land cover classification ranges between 81% (for the year 1988) and 84% (for the year 2017). The land use/land cover maps show an increase in the built-up area and a decrease in the agricultural area. The change has been observed vis-a-vis channel migration indicating that the migration directly affects the floodplain habitats which in turn affects the land use, Findings of this study highlight geomorphological instabilities of the study area and the vulnerability of the habitations residing near the Subansiri river.

show abstract

Section: Discussionmentioning

confidence: 78%

Channel Migration and Consequential Land Use Land Cover Changes of Subansiri River, Assam, North-Eastern India

Acharjee

Das²,

Shekhar³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…The extent of the liquefaction occurred within the flood plain of the Manu River. Typically, the River Manu is famous for its dynamic nature (Debnath, Das (Pan), Sharma, & Ahmed, 2019) and the present epicenter area as part of its dynamic nature has been formed by the river deposition. According to Anbazhagan et al (2019), the presence of the sediment and the existence of a water table near the surface could be a reason for the liquefaction in this area.…”

Section: Soil Liquefactionmentioning

confidence: 99%

Assessment on the impact of the Tripura earthquake (January 3, 2017, mw = 5.6) in Northeast India

Debbarma

Debnath

2021

J GEOGR INST CVIJIC

Self Cite

View full text Add to dashboard Cite

The northeastern part of the Indian subcontinent, considered as the most active seismic zone of the Indian subcontinent, was hit by an earthquake of Mw 5.6 on January 3, 2017. The epicenter of this earthquake was Kanchanbari located in the Dhalai district of Tripura. The present study aims to assess the environmental and socio-economic impact of this earthquake in the vicinity of the epicenter. To assess and determine the level of damage, the affected areas were visited during the first week of the 2017 earthquake. Various Government offices were also consulted to acquire data on damages caused by the earthquake. Moreover, Remote Sensing and Geographical Information System (RS & GIS) techniques were applied to address the influence of this earthquake on bank erosion. During the field visit, the striking features of soil liquefaction generated by the earthquake were observed in the flood plain area of the Manu River. Landslide, with three casualties in India and the neighbor Bangladesh, and damages of infrastructure were also reported. Additionally, an assessment of the bank erosion study revealed that the rate of the post-earthquake bank erosion increased to 592%, compared to the pre-earthquake bank erosion within the study length of the Manu River. The findings highlighted that the impact of this earthquake is minimal. However, the seismotectonic features and observation of the liquefaction within the risk zone of the earthquake indicate a possible significant threat for the future.

show abstract

“…Over time, these bends can migrate laterally, causing the river channel to shift its position. Globally, many studies in uvial geomorphology have been applying geospatial technology, such as those in the United States on the Lower Yuba River and Lower Mississippi River [28,25], China on the Yellow River and the Ningxia-Inner Mongolia reaches of the Yellow River [69, 71,72], Australia on the lower Pages River [20], Italy's Piave river and Tammaro River [36,59] , the Manu River of East India [17], Jamuna River of Bangladesh [11,29], Spain on Jarama and Tagus rivers and several rivers reaches on Ebro basin [64,9].…”

Section: Introductionmentioning

confidence: 99%

GIS and Remote Sensing Based Assessment of West Rapti River Channel Migration in Nepal

Gharti,

Silwal,

Poudel

et al. 2024

Preprint

View full text Add to dashboard Cite

This study uses geospatial technique to analyze the spatio-temporal changes of West Rapti River Channel from 1990 to 2023, to assess their impact in Deukhuri Valley. Using freely available Landsat satellite imagery we extracted water surface features through the Normalized Difference Water Index (NDWI) and generated 27 cross-sections (CS) to track channel shift. The results indicated the significant shifts, notably 1426.97 m northeast shift in CS-23 and 718.55 m south shift in CS-25 attributed to sand deposition during flooding. Nearly no shifting impact was observed from CS-12 to CS-17 showing embankment and mitigation efforts being effective within this range. Study shows river is naturally multi-channeled and exhibits braided planform with sinuosity index values ranging from 1.02 to 1.38, indicating highly braided during 2010 and 2015. The river channel was found to be driven by a high sediment deposit of about 15.35 Sq. km across the 53 km range. These results are crucial for formulating integrated river basin management plans in the West Rapti River basin laying foundation for future research to explore sustainable management practices in the future.

show abstract

Impact of confluence on hydrological and morphological characters of the trunk stream: a study on the Manu River of North-east India

Cited by 9 publications

References 64 publications

Channel Migration and Consequential Land Use Land Cover Changes of Subansiri River, Assam, North-Eastern India

Channel Migration and Consequential Land Use Land Cover Changes of Subansiri River, Assam, North-Eastern India

Assessment on the impact of the Tripura earthquake (January 3, 2017, mw = 5.6) in Northeast India

GIS and Remote Sensing Based Assessment of West Rapti River Channel Migration in Nepal

Contact Info

Product

Resources

About