Factors controlling suspended sediment transport in Himalayan glacier meltwaters

Hasnain, Syed Iqbal

doi:10.1016/0022-1694(95)02917-6

Cited by 39 publications

(26 citation statements)

References 11 publications

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“…Some data on sediment yields from the Himalayan glaciers and streams exist (Hasnain, 1996;Hasnain & Thayyen, 1999;, Singh & Hasnain, 1998 but far less is known about the particle size distribution (Thayyen et at., 1999) and practically no information is available on the morphoscopy and elemental composition of glaciofluvial sediments. For water resources planning, the textural characteristics of the particles are an important factor in determining the rate of transport, the impact on the quality of potable water supplies and the likely distribution of materials deposited in reservoirs, or in approaches to barrages and bridges.…”

Section: Introductionmentioning

confidence: 99%

Grain-size distribution, morphoscopy and elemental chemistry of suspended sediments of Pindari Glacier, Kumaon Himalaya, India

Pandey

Singh

Hasnain

2002

Hydrological Sciences Journal

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Section: Introductionmentioning

confidence: 99%

Grain-size distribution, morphoscopy and elemental chemistry of suspended sediments of Pindari Glacier, Kumaon Himalaya, India

Pandey

Singh

Hasnain

2002

Hydrological Sciences Journal

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“…water discharge, suspended sediment concentration and bed load), since establishing such a relationship is crucial for an overall understanding of the sediment transport phenomenon (e.g. Lewis, 1921;Einstein, 1943;Heidel, 1956;Milliman & Meade, 1983;Gilvear & Petts, 1985;Petts et al, 1985;Gilvear, 1987;Leeks & Newson, 1989;Bull et ai, 1995;Hasnain, 1996;Olive et al, 1996;Bull, 1997;Restrepo & Kjerfve, 2000). Even though significant progress has been achieved using such approaches, a fair understanding of the sediment transport phenomenon is still elusive, as there is not a simple, and commonly accepted, relationship between the components.…”

Section: Introductionmentioning

confidence: 99%

An investigation of the presence of low-dimensional chaotic behaviour in the sediment transport phenomenon

Sivakumar¹,

Jayawardena²

2002

Hydrological Sciences Journal

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Understanding the dynamics of the various components (and the mechanisms involved) in a river system and establishing precise relationships between them are important for an accurate description of the sediment transport phenomenon. Despite the significant progress achieved in the last century with the development of a variety of approaches, there is no generally accepted simple relationship between the components. A preliminary attempt is made herein to address the sediment transport problem from a low-dimensional chaotic dynamical perspective. Such an approach assumes that the seemingly complex behaviour of the sediment transport phenomenon can be the outcome of a simple deterministic system influenced by a few dominant nonlinear interdependent variables sensitive to initial conditions. As a first step towards assessing the validity of such a hypothesis, the dynamical behaviours of three important (and related) components of the sediment transport phenomenon, i.e. water discharge, suspended sediment concentration and bed load, in the Mississippi River basin (at St Louis, Missouri), USA are studied. The correlation dimension method is employed to identify the dynamical behaviour (chaotic or stochastic). The results indicate that the three components exhibit low-dimensional chaotic behaviour. A possible implication of such results could be that the complete sediment transport phenomenon might also exhibit low-dimensional chaotic behaviour. Efforts towards analysing the other components of the sediment transport system and establishing relationships between them are underway.Key words sediment transport; chaos; discharge; suspended sediment concentration; bed load; phase-space reconstruction; correlation dimension Recherche sur la présence d'un chaos déterministe de faible dimension dans le phénomène de transport sédimentaire Résumé II est particulièrement important de comprendre la dynamique des différentes composantes (et des processus impliqués) dans un cours d'eau et d'établir entre elles des relations précises pour décrire précisément le phénomène de transport sédimentaire. En dépit des progrès accomplis durant le siècle dernier selon différentes approches, il n'existe pas d'accord sur une relation simple entre les différentes composantes. Nous proposons ici une tentative préliminaire de traiter le transport sédimentaire selon une problématique de chaos déterministe de faible dimension. Une telle approche suppose que le comportement apparemment complexe du transport sédimentaire pourrait être le résultat d'un système non linéaire déterministe simple sensible aux conditions initiales et dépendant d'un petit nombre de variables dominantes. Pour tenter une première évaluation de cette hypothèse nous avons étudié le comportement dynamique de trois composantes importantes (corrélées) du processus de transport sédimentaire, à savoir le débit, la concentration de matières en suspension et la charge de fond, dans le bassin du Missouri (à Saint-Louis, Missouri) aux Etats-Unis. La méthode de la dimension de c...

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“…The main cause of erosion in the Himalayan region is its young, fragile geology and steep catchments [10], along with intense rainfall during the monsoon season. Himalayan rivers draining the tectonically active belts show very high sediment yields [11]. Runoff and sediment load changes are affected by climate change and human activities in an integrated way.…”

Section: Introductionmentioning

confidence: 99%

“…Studies of Himalayan glaciers show that about 70 percent of the sediment load emerging from a glacier at its terminus goes into temporary storage in the alpine watershed and subsequently is removed in periods of high discharge during the monsoonal months [11]. Studies of diurnal variations also suggest that suspended sediment corresponds to water discharge [15].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Sediment Load of Langtang River in Rasuwa District, Nepal

Chhetri¹,

Kayastha²,

Shrestha³

2016

JWARP

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This paper assesses the sediment load of the glacier fed Langtang River, Nepal from April 2014 to March 2015. Water samples were collected from the centre of the river with a frequency of two samples per each sampling day using the Depth Integration Technique (DIT) on daily basis in the monsoon season, weekly in the pre-and post-monsoon seasons and bi-monthly in the winter season. Suspended sediment concentration (SSC) is calculated from the water samples using filtration followed by oven-drying, and a rating curve is used to calculate daily discharge of the Langtang River. The annual sediment yield is 109,276.75 tons and 37.69, 11.52 and 5.54 tons of sediment is transported per day in the pre-monsoon, post-monsoon and winter seasons, respectively. There is a very high value of 872.86 tons per day in the monsoon season, which contributes the highest sediment load among all of the seasons comprising 83% of the total sediment transport. Diurnal cycle of sediment discharge is clearly seen with higher sediment discharge during the evening than the morning and reaching maximum values of 41.1 kg•s −1 and 61.5 kg•s −1 , respectively. A clock-wise hysteresis loop has been obtained for discharge and sediment discharge where sediment flux is higher in the early monsoon than in the late monsoon for a corresponding discharge.

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Factors controlling suspended sediment transport in Himalayan glacier meltwaters

Cited by 39 publications

References 11 publications

Grain-size distribution, morphoscopy and elemental chemistry of suspended sediments of Pindari Glacier, Kumaon Himalaya, India

Grain-size distribution, morphoscopy and elemental chemistry of suspended sediments of Pindari Glacier, Kumaon Himalaya, India

An investigation of the presence of low-dimensional chaotic behaviour in the sediment transport phenomenon

Assessment of Sediment Load of Langtang River in Rasuwa District, Nepal

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