<p>Hydrogeochemistry of meltwater along with chemical weathering and suspended sediment transport in the glacial environment plays an important role in the assessment of meltwater quality, dissolved load, chemical weathering rate, consumption of CO₂ from the atmosphere and suspended sediment flux in the glacierized area. HCO₃⁻ was the abundant anion in the Gaglu glacier meltwater constituting 67.6%, 74.9%, 77.6% and 74.6% of TZ⁻ (total anions) during the study period 2015, 2017, 2018 and 2019, respectively. While, Ca²⁺ was the dominant cation constituting 54.2% in 2015, 55% in 2017, 57.5% in 2018 and 56.8% in 2019 of TZ⁺ (total cations) in the glacial stream meltwater. High equivalent (Ca + Mg) versus TZ⁺ and (Ca + Mg) versus (Na + K) ratios and low (Na + K) versus TZ⁺ ratio in the meltwater for all the four years of study shows that carbonate weathering regulates stream water hydrochemistry of the Gaglu glacier followed by silicate weathering. The mean dissolved load of the Gaglu glacier was estimated to be 25.5 t/day. Carbonate weathering rate (CWR) (78.7 t/km²/year) in the Gaglu glacier basin shows higher value with respect to silicate weathering rate (SWR) (27.4 t/km²/year). Total CO₂ consumption rate [φCO₂] via chemical weathering (contains both carbonate and silicate weathering) in the glacier basin has been calculated to be 17.6 × 10⁵&#xa0;mol/km²/year during the observation period July 2019. The annual CO₂ drawdown by the Gaglu glacier basin (843 × 10⁵&#xa0;mol/year) is higher in comparison to the Batal glacier basin situated in the same region (i.e. Chandra basin), which might be due to high glacial stream discharge and bigger size of the Gaglu glacier as compared to the Batal glacier. The average value of suspended sediment load (SSL) and physical weathering rate of Gaglu glacier was calculated to be 841 t/day and 6402 t/km²/year, respectively, which shows higher value with respect to the Chhota Shigri glacier situated near the Gaglu glacier.</p>