Assessing the Status of Changing Channel Regimes of Balason and Mahananda River in the Sub-Himalayan West Bengal, India

Mitra, Suman; Roy, Asit Kumar; Tamang, Lakpa

doi:10.1007/s41748-020-00160-y

Cited by 22 publications

(13 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One ubiquitous feature of urban stream syndrome is alteration of the river channel morphology and stability [9][10][11][12]14,[30][31][32][33][34][35][36]. Generally speaking, rivers will adjust their shapes in response to natural fluctuations in sediment supply and flow regime [30,37], and the rate of this response is frequently accelerated by watershed urbanization.…”

Section: Introductionmentioning

confidence: 99%

“…More issues can arise from installation of drainage pipe networks that often lead to rainwater being collected over a much larger area, thereby increasing the extent of the area delivering flows to downstream channels [42][43][44]. Collectively, these practices can result in much more stormwater runoff being instantaneously delivered to the channel head, and this increases the energy of the flow regime to a point that exceeds the rivers natural transport capacity [8,12,35,36,45,46].…”

Section: Introductionmentioning

confidence: 99%

“…Channels respond to such energy perturbations by first incising into the channel bed by erosion [10,29,35,37,44], which is intensified by the coarsening of bed materials [33]. Because incision leads to a deeper channel, the banks steepen and become unstable and more prone to erosion through bank failures [44,47,48], thereby widening the channel and increasing sedimentation [48].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cohesive Channel Response to Watershed Urbanization: Insights from the Sand River, Aiken SC

Sullivan

Grubb

Willis

et al. 2020

Water

View full text Add to dashboard Cite

Stream channel degradation is among the most widely documented symptoms of urban stream syndrome arising from watershed urbanization. Nevertheless, our present understanding of space and time scales associated with channel response to urbanization is poorly constrained and largely limited to assessments of non-cohesive systems. The purpose of this study is to assess the evolution of a cohesive, ephemeral river channel in response to watershed urbanization. The assessment of historical images document the stable, pre-urbanized channel conditions from 1870 to 1930. Historical assessments revealed a 131% increase in urbanized watershed area from 1930 to 1992, and a minimal increase in urbanized extent from 1992 to 2012. A 2012 lidar dataset was used to generate the modern long-channel profile, to reconstruct cross-channel profiles observed in 2002, and to estimate the volume flux of sediment removed from the channel from 1930 to 1992, and from 1992 to 2012. The long-channel profile reveals incision of up to 35 m in response to urbanization from 1930 to 1992. Cross-channel profiles reveal incision and widening of 2.5 and 3 m, respectively, from 2002 to 2012. Volume flux estimates indicate erosion rates of 9000 m3/yr during the first 62 years of the study period, and a flux of 4000 m3/yr after installation of stormwater control measures in 1992. Collectively, our findings highlight a cohesive channel that has undergone substantial incision and widening at a rate of ~0.20 m/yr since 1930, and the channel continues to adjust. Hence, we contend that the channel has not yet attained a new equilibrium “shape” at 82 years after peak land use change within the watershed, and that the channel will continue to adjust its shape until this new balance is achieved.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cohesive Channel Response to Watershed Urbanization: Insights from the Sand River, Aiken SC

Sullivan

Grubb

Willis

et al. 2020

Water

View full text Add to dashboard Cite

show abstract

“…The impact of anthropogenic interference on the fluvial regime was investigated by adopting a combined methodological framework, comprising field survey (Mitra et al, 2020), laboratory and statistical analyses. The field survey was mainly composed of geological, geophysical and hydrogeological/hydromorphological analyses.…”

Section: Methodsmentioning

confidence: 99%

Socio-economic influence of hydrogeology in regions adjoining coal bearing formation: Water policy in Anambra Basin

et al. 2021

View full text Add to dashboard Cite

The Coal Province lies within the central portion of Anambra Basin and along the axis of regional water resources catchment of Southeastern Nigeria. Although this area includes a prolific aquifer, the high cost of development and treatment of the groundwater degraded by AMD has created water scarcity problems against water policy initiatives. Social and economic impacts were investigated, even as policy measures for rehabilitation purposes through water resource management were highlighted. Several geoscientific methods were integrated for the investigations. Mean resistivity up to 30 Ω-m relatively at shallow depths indicated aquitards of Enugu/Mamu Formations, whereas the aquifer reflected resistivity ≤1,000 Ω-m at depths of ≥180 m across Ajali Sandstone. Alkaline-rich seepage flushed Fe-rich AMD at aquifer-aquitards interfaces adjoining the river catchment area. The AMD-induced oxidation process produced noxious Ca-Mg-Na-HCO3-SO4-Cl facie. These results were correlated with policy related questionnaires. Plans for water security were proposed, mainly to channel groundwater directly from the regional aquifer, or the chemically degraded seeped water from the fluvial system, into constructor water reservoir (treatment) columns prior to distribution to the town-water supply. Such water resource development is cost effective; and with management policies regulated by relevant decision-making agencies, sustainable supply is assured.

show abstract

“…Bank soil properties, ratio of bank materials, cohesiveness, vetegetal cover and the extremity of flood discharge are the responsible factors for the river bank failure of any region [20,21].Overtopping and cantilevered blocks along the obtuse angular dispositions eventually receive the thalweg closer to the bank [22]. Sediment transportation and deposition of sediments over the bank tops during the flood situation on any floodplain enhances the chances of soil erosion where the seasonal rainfall extremity is quite high [23,24]. Remote Sensing study is very effective to find out the vegetal coverage of any region and its spatio-temporal study is quite effective to trace the dynamicity of the vegetal cover as it has a major role to reduce the soil erosion as well as river bank stabilization [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Assessment of bank erosion and its impact on land use and land cover dynamics of Mahananda River basin (Upper) in the Sub-Himalayan North Bengal, India

Chakraborty

Saha

2021

SN Appl. Sci.

View full text Add to dashboard Cite

Bank erosion is the predominant character of River Mahananda in the Sub-Himalayan North Bengal. The present study aims to identify the bank erosion mechanism as well as the impact of river bank erosion on land use and land cover (LULC) dynamics of the study area. Survey of India (SOI) topographical map 78 B/5 (1975) and satellite imageries for the temporal year of 1991 and 2019 from USGS have been used for the study. For the assessment of bank erosion process Bank erosion hazard index (BEHI) model has been adopted here. The channel migration has been delineated by the superimposition of temporal bank lines extracted from the temporal satellite imageries. LULC analysis has been carried out through the supervised classification technique using remote sensing and GIS tools. Form the assessment of BEHI it can be visualized that the scores have been ranging from 30.75 to 44.30 which indicates high to very high vulnerable areas under fluvial erosion. The channel migration for the temporal period from 1991 to 2019 is ranging from 7.72 to 411.16 m along the studied reach which reflects the high erosion effectiveness. From LULC classes it has been assessed that settled or built-up areas have been increased and the water body is gradually decreased overall in the study area. The study resulted that the river bank erosion has its direct impact on land use of the studied area. In the study vulnerable sites to fluvial erosion have been delineated and unplanned land use can be managed through sustainable way.

show abstract

Assessing the Status of Changing Channel Regimes of Balason and Mahananda River in the Sub-Himalayan West Bengal, India

Cited by 22 publications

References 46 publications

Cohesive Channel Response to Watershed Urbanization: Insights from the Sand River, Aiken SC

Cohesive Channel Response to Watershed Urbanization: Insights from the Sand River, Aiken SC

Socio-economic influence of hydrogeology in regions adjoining coal bearing formation: Water policy in Anambra Basin

Assessment of bank erosion and its impact on land use and land cover dynamics of Mahananda River basin (Upper) in the Sub-Himalayan North Bengal, India

Contact Info

Product

Resources

About