Dynamics of suspended sediment load with respect to summer discharge and temperatures in Shaune Garang glacierized catchment, Western Himalaya

Kumar, Rajesh; Kumar, Ramesh; Singh, Shaktiman; Singh, Atar; Bhardwaj, Anshuman; Kumari, Anupma; Randhawa, Surjeet Singh; Saha, Ashok

doi:10.1007/s11600-018-0184-4

Cited by 32 publications

(12 citation statements)

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“…The advent of UAVs in glaciology 25 provides such opportunities of generating repeated low-cost, high-resolution topographies with unprecedented accuracies and can contribute extensively to the Himalayan glaciological research. Changes in glacier dynamics can significantly affect the dynamics of suspended sediment load with respect to seasonal discharges and temperatures in the Himalayan glacierised catchments 76 and since the lower reaches of Baspa River basin are home to several proposed and running hydroelectric projects 76 , understanding glacier dynamics with respect to different seasons and its effect on the sediment load becomes extremely relevant as one of the future scopes of our study.…”

Section: Discussionmentioning

confidence: 99%

Heterogeneity in topographic control on velocities of Western Himalayan glaciers

Sam

Bhardwaj

Kumar

et al. 2018

Sci Rep

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Studies of the seasonal and annual patterns of glacier velocities improve our understanding of the ice volume, topography, responses to climate change, and surge events of glaciers. Such studies are especially relevant and equally rare for the Himalayan glaciers, which supply many rivers that sustain some of the most heavily populated mountainous regions in the world. In particular, the control of the hypsometric distribution of geomorphometric parameters, such as slope, aspect, and curvature, on the dynamics of Himalayan glaciers have never been studied so far, at the river basin scale. Here, we present the degree to which topographic and hypsometric parameters affect the seasonal and annual average flow velocities of 112 glaciers in the Baspa River basin in the Western Indian Himalaya by analysing Global Land Ice Velocity Extraction from Landsat 8 (GoLIVE) datasets for the years 2013–2017. We observe, (i) significant heterogeneity in topographic controls on the velocities of these glaciers, (ii) elevation and the seasons play important roles in regulating the degree to which morphometric parameters (slope, aspect, and curvature) affect these velocities, (iii) a possible polythermal regime promoting both sliding and deformational forms of motion in a majority of these glaciers, and (iv) a detailed analysis of complex topographic controls within various elevation zones using a novel hypso-morphometric approach. These findings can help us to better model the dynamics of Himalayan glaciers and their responses to the future climatic scenarios. The inferences also suggest the need to incorporate dynamic topography in glacio-hydrological models in the wake of constant glacial evolutions.

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Section: Discussionmentioning

confidence: 99%

Heterogeneity in topographic control on velocities of Western Himalayan glaciers

Sam

Bhardwaj

Kumar

et al. 2018

Sci Rep

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“…The TDS of meltwater varied from 63.36 to 101.05 mg/L (average 89.82±11.53 mg/L) in 2015 and 59.54 to 99.55 mg/L (average 81.12±4.97 mg/L) in 2016. High variability in EC also indicates that the catchment hydrogeochemistry is mainly controlled by rock water interaction and meteorological parameters (Kumar et al, 2018). Our results show higher average values of EC and TDS during the ablation season in 2015, compared to that in 2016.…”

Section: Hydrogeochemistry Of Glacier Meltwatermentioning

confidence: 51%

“…The shape of the glacier snout keeps changing due to splitting of ice blocks from the terminus and subsidence at glacier portal (Bisht et al, 2020a). The regional scale precipitation is mainly influenced by the ISM as well as IWM (Kumar et al, 2018). Presently, the glacier comprises more than three active (connected with the trunk) tributary glaciers (Suralaya, Seeta, Vashuki, etc.)…”

Section: Study Area and Regional Geologymentioning

confidence: 99%

Hydrogeochemical analysis and identification of weathering processes to determine the solute sources in meltwater of Chaturangi glacier, Garhwal Himalaya, India

Bisht

Kotlia

Kumar

et al. 2020

Preprint

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This paper presents an insight on the major ion chemistry of Chaturangi glacier meltwater and chemical weathering processes to identify ionic sources and factors controlling the ionic composition of meltwater during the ablation year 2015 and 2016. The analytical results show that the meltwater is slightly acidic in nature with Mg-HCO3 and Ca-HCO3 dominated hydrochemical facies in years 2015 and 2016 respectively. In glacier meltwater, Ca2+ is the most dominant cation and HCO3-is the most dominant anion in both the years. Due to less anthropogenic influence, chemical weathering of the surrounding rocks is the foremost mechanism, controlling the hydrogeochemistry of meltwater. The gibbs plot and mineralogy of surrounding rocks suggests that ionic concentration of meltwater is mainly controlled by rock weathering with little contribution from the atmosphere. A comparatively higher contribution of (Ca+Mg) in total cations and higher elemental ratio of (Ca+Mg)/(Na+K) (1.47±0.14) and (1.44±0.28) in year 2015 and 2016 respectively, clearly demonstrates that chemical composition is mainly controlled by carbonate weathering and partly by silicate weathering. Furthermore, the low elemental ratio of (Na+K)/TZ-(0.41±0.02) and (0.22±0.05) in 2015 and 2016 respectively also suggests that carbonate weathering is a dominant geochemical process controlling meltwater chemistry of the study area. In addition the ion denudation rate was also calculated for both the years. The results shows that cation denudation rate of meltwater of Chaturangi glacier were 32.84 and 22.30 ton/km2/ablation during 2015 and 2016 respectively, whereas the anion denudation rates were 205.43 and 170.24 ton/km2/ablation in 2015 and 2016 respectively.

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“…Since there is a strong dependence of sediment concentration primarily on streamflow, we established a relationship between SSC and MDD on a daily scale. Since sediment transport measurements are labor-intensive and expensive in terms of both cost and time [47], sediment yield is typically predicted using different physically-based, empirical or statistical models [18,48,49]. The developed power-law relationship demonstrated a much better estimation (R 2 > 0.7) for monthly SSC and a fair estimation (R 2~0 .4) for daily SSC.…”

Section: Discussionmentioning

confidence: 99%

Insights on the Impacts of Hydroclimatic Extremes and Anthropogenic Activities on Sediment Yield of a River Basin

Talchabhadel

Panthi

Sharma

et al. 2021

Earth

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Streamflow and sediment flux variations in a mountain river basin directly affect the downstream biodiversity and ecological processes. Precipitation is expected to be one of the main drivers of these variations in the Himalayas. However, such relations have not been explored for the mountain river basin, Nepal. This paper explores the variation in streamflow and sediment flux from 2006 to 2019 in central Nepal’s Kali Gandaki River basin and correlates them to precipitation indices computed from 77 stations across the basin. Nine precipitation indices and four other ratio-based indices are used for comparison. Percentage contributions of maximum 1-day, consecutive 3-day, 5-day and 7-day precipitation to the annual precipitation provide information on the severity of precipitation extremeness. We found that maximum suspended sediment concentration had a significant positive correlation with the maximum consecutive 3-day precipitation. In contrast, average suspended sediment concentration had significant positive correlations with all ratio-based precipitation indices. The existing sediment erosion trend, driven by the amount, intensity, and frequency of extreme precipitation, demands urgency in sediment source management on the Nepal Himalaya’s mountain slopes. The increment in extreme sediment transports partially resulted from anthropogenic interventions, especially landslides triggered by poorly-constructed roads, and the changing nature of extreme precipitation driven by climate variability.

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Dynamics of suspended sediment load with respect to summer discharge and temperatures in Shaune Garang glacierized catchment, Western Himalaya

Cited by 32 publications

References 50 publications

Heterogeneity in topographic control on velocities of Western Himalayan glaciers

Heterogeneity in topographic control on velocities of Western Himalayan glaciers

Hydrogeochemical analysis and identification of weathering processes to determine the solute sources in meltwater of Chaturangi glacier, Garhwal Himalaya, India

Insights on the Impacts of Hydroclimatic Extremes and Anthropogenic Activities on Sediment Yield of a River Basin

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