Total organic carbon transport by the Alaknanda River, Garhwal Himalayas, India

Panwar, S.; Gaur, Divya; Chakrapani, G. J.

doi:10.1007/s12517-017-3003-3

Cited by 15 publications

(8 citation statements)

References 33 publications

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“…However, recent studies have suggested that organic carbon as a solute source may actually be less important in subglacial environments than previously believed (Graly and others, 2017) particularly in silicate catchments typical of the Himalayan basins presented in this study. Additionally, dissolved organic carbon (DOC) is usually low in the Himalayan streams (Panwar and others, 2017). Therefore, we assumed that dissolved inorganic carbon (DIC) generated via organic carbon oxidation is negligible.…”

Section: Methodsmentioning

confidence: 99%

Carbonate and silicate weathering in glacial environments and its relation to atmospheric CO₂ cycling in the Himalaya

Shukla¹,

Sundriyal

Stachnik

et al. 2018

Ann. Glaciol.

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This paper presents new insights into the global carbon cycle related to CO2 consumption from chemical denudation in heavily glacierised Himalayan catchments. Data from previous studies of solute concentrations from glacierised catchments were reprocessed to determine the regional scale of CO2 consumption and solute hydrolysis. The results show that ~90% of the SO42− is derived from crustal sulphide oxidation and ~10% from aerosols and sea salts. However, HCO3− flux calculation estimates contribution from sulphide oxidation to carbonate dissolution (SO-CD) (~21%), similar to the contributions from silicate dissolution and simple hydrolysis (~21 and ~20%, respectively). Furthermore, the atmospheric CO2 consumption estimations suggests 10.6 × 104 mole km−2 a−1 (19%) through silicate weathering, 15.7 × 104 mole km−2 a−1 (28%) through simple hydrolysis, 9.6 × 104 mole km−2 a−1 (17%) through SO-CD reaction and 5.9 × 104 mole km−2 a−1 (11%) through carbonate carbonation reaction. Our solute provenance calculations clearly indicate that HCO3− production and CO2 consumption via silicate weathering reactions is balanced by the simple hydrolysis and coupled SO-CD process. This shows a counter mechanism operating in subglacial environments of the Himalaya as a source of CO2 to runoff rather than a sink.

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Section: Methodsmentioning

confidence: 99%

Carbonate and silicate weathering in glacial environments and its relation to atmospheric CO₂ cycling in the Himalaya

Shukla¹,

Sundriyal

Stachnik

et al. 2018

Ann. Glaciol.

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“…(1995). The average concentration of DOC in Ramganga basin is two times higher from closely associated Alaknanda Basin, which was around 1.2 mg L −1 (Panwar et al, 2017). From the Fig.…”

Section: Spatial Variations In Dissolved Organic and Inorganic Carbonmentioning

confidence: 71%

“…Forest covers which occupied > 75 % of the upper reaches of the Ramganga basin might be a possible factor for the SOC concentration. SC mostly shows positive correlation with SSC (Panwar et al, 2017). In case of Ramganga River and its tributaries, a positive correlation between SSC with SIC and SOC is shown in Fig.…”

Section: Spatial Variations In Suspended Organic and Inorganic Carbonmentioning

confidence: 73%

“…Dissimilar to the case of DIC, SIC does not show any spatial variation from upstream and downstream of the river. Panwar et al (2017), stated that due to variations in topography and rates of chemical weathering, the organic carbon transported by River Ganges mainly in the form DOC in its upstream and mostly as SOC down the Himalayan foothills. The possible factors behind the SIC concentrations in the upper reaches of the basin, which flows through Kumaon Himalayas is may be due to the dilution of carbonate and silicate rocks by chemical weathering.…”

Section: Spatial Variations In Suspended Organic and Inorganic Carbonmentioning

confidence: 99%

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Understanding the potential sources and environmental impacts of dissolved and suspended organic carbon in the diversified Ramganga River, Ganges Basin, India

Khan

2018

Proc. IAHS

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Innovative water resources management -understanding and balancing interactions between humankind and nature Understanding the potential sources and environmental impacts of dissolved and suspended organic carbon in the diversified Ramganga River, Ganges Basin, India Abstract. The river network is one of the important transporters of nutrients from the environment and land masses to the oceans and regularly provides storage for several compounds. The variations in suspended and dissolved discharge of the river are more substantial than the changes in water discharge. (Suspended and dissolved) organic carbons (SOC and DOC) are imperative segments in the carbon cycle and fill in as essential food sources for amphibian sustenance networks. In the present study, 26 samples of water were collected from different locations over the 642 km stretch of the Ramganga River and its adjoining tributaries to observe the spatial variation of DOC, dissolved inorganic carbon (DIC), SOC and suspended inorganic carbon ( with an average convergence of 9.25 and 5.14 g kg −1 , separately. The results also show the higher values of DOC as compared with SOC and these values shows an increasing pattern with a decrease in elevation.

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“…a.s.l.). After covering a course of 191km, it merges with Bhagirathi river at Devprayag to form the river Ganga (Panwar et al, 2017). Alaknanda harbours a variety of flora and fauna.…”

Section: Introductionmentioning

confidence: 99%

Seasonal variations in proximate composition and metallic elements of three cyprinids from a Central Himalayan river Alaknanda in Garhwal Himalaya, India

Sharma

Kumar

Singh

2020

JANS

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Fish is an irreplaceable, highly nutritious aquatic food in a balanced diet. On the contrary, fish can also be a source of metal contamination when ingested in excess through food and water. The aim of the present study was to determine the seasonal variations in the proximate body composition and levels of Na, K, Ca, Fe, Zn, Cu, and Pb in the muscle tissue of three fish species namely, Schizothorax plagiostomus, Schizothorax progastus and Barilius bendelisis dwelling in Central Himalayan river Alaknanda at Srinagar (Garhwal) in Garhwal Himalaya. The protein (21.01-21.74%) and carbohydrates (2.31-2.69%) were found maximum in summer season in all the studied fishes while lipid was found to be highest during monsoon season in S. plagiostomus (2.73%) and S. progastus (2.70%) and lowest (1.62-1.68%) in the winter season. B. bendelisis showed a different pattern of variation in lipid content being highest (6.32%) during summer and lowest (3.34%) in monsoon season. Significantly (F=5.69, p<0.04) high content of lipid was found in B. bendelisis as compared to S. plagiostomus and S. progastus during the three seasons. Na, Ca, K, and Fe were detected highest during monsoon, Pb, and Cu during summer and Zn during the winter season. However, Pb was not detected in all the fish samples during monsoon season. B. bendelisis was significantly (p<0.001)rich in Na and Ca, S. plagiostomus in K (p<0.01), and S. progastus in Fe (p<0.001) content during all three seasons. Ca was rich among macroelements while Fe among microelements in all the studied fishes. The amount of Zn (1.48-4.55 mg/100g), Cu (0.429-0.869 mg/100g), and Pb (0.117-0.447 mg/100g) were within the permissible limits of International food safety guidelines. The seasonal variations in the parameters are attributed to food availability, temperature changes, fish metabolism, and prevailing environmental conditions. Thus, these cyprinid species were regarded as safe and useful for human consumption.

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Total organic carbon transport by the Alaknanda River, Garhwal Himalayas, India

Cited by 15 publications

References 33 publications

Carbonate and silicate weathering in glacial environments and its relation to atmospheric CO₂ cycling in the Himalaya

Carbonate and silicate weathering in glacial environments and its relation to atmospheric CO₂ cycling in the Himalaya

Understanding the potential sources and environmental impacts of dissolved and suspended organic carbon in the diversified Ramganga River, Ganges Basin, India

Seasonal variations in proximate composition and metallic elements of three cyprinids from a Central Himalayan river Alaknanda in Garhwal Himalaya, India

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Total organic carbon transport by the Alaknanda River, Garhwal Himalayas, India

Cited by 15 publications

References 33 publications

Carbonate and silicate weathering in glacial environments and its relation to atmospheric CO2 cycling in the Himalaya

Carbonate and silicate weathering in glacial environments and its relation to atmospheric CO2 cycling in the Himalaya

Understanding the potential sources and environmental impacts of dissolved and suspended organic carbon in the diversified Ramganga River, Ganges Basin, India

Seasonal variations in proximate composition and metallic elements of three cyprinids from a Central Himalayan river Alaknanda in Garhwal Himalaya, India

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Product

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Carbonate and silicate weathering in glacial environments and its relation to atmospheric CO₂ cycling in the Himalaya

Carbonate and silicate weathering in glacial environments and its relation to atmospheric CO₂ cycling in the Himalaya