Hydrochemical appraisal and solute acquisitions in Seti River Basin, Central Himalaya, Nepal

Pant, Ramesh Raj; Qaiser, Faizan-ur-Rehman; Wang, Guanxing; Adhikari, Subash; Bishwakarma, Kiran; Baral, Upendra; Rimal, Bhagawat; Bhatta, Youb Raj; Rijal, Kedar

doi:10.1007/s10661-021-09437-9

Cited by 11 publications

(2 citation statements)

References 40 publications

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“…In Figure 6, most of the sampling sites in the PC during the normal, wet and dry seasons fall in the middle of the diagram, indicating that the ionic composition of the studied rivers mainly consists of a combination of carbonate weathering and silicate weathering in the catchments. This accords with another river running through the southern plateau, i.e., Nyangchu, which flows northward and joins the Yarlung Tsangpo near Shigatse city [45]; however, it differs from some rivers draining in southern Himalayas, e.g., the Seti River, where carbonate weathering has largely controlled the solute acquisition processes [52].…”

Section: Hydrochemical Types and Their Controlling Factors In The Pcmentioning

confidence: 60%

Geochemical Characterization of the River Waters in the Pumqu Catchments, Central Himalayas

Yang

Chen

Renzeng³

et al. 2022

Water

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Pumqu is the biggest river in the Qomolangma National Natural Reserve in China. It is one of the headwaters of the river Ganges and is an important international river in southern Tibet Autonomous Region (T.A.R). However, there are a lack of systematic studies on Pumqu’s geochemical properties. In this study, water samples were collected systematically from all the river catchments in different seasons in 2021, the spatiotemporal variations of the geochemical characteristics of the catchments and their controlling factors were studied, and the overall water quality of the river was also evaluated. Overall, the results showed that the water from the Pumqu catchments was slightly alkaline, with an average pH of 8.22. The number of total dissolved solids was comparable to the other rivers on the Tibetan Plateau and showed a similar variation over the year. Affected by the natural geothermal spring water discharge, the values of oxidation reduction potential at some sampling sites were negative in the wet season. Generally, Ca2+ and HCO3− were the dominant ions. Carbonate weathering was the main factor affecting the geochemical features of the studied catchments. The results of correlation analysis showed the influence of rock weathering, glacial meltwater, geothermal water discharge and riverine physicochemical processes on the trace elements. The natural geothermal water discharge was particularly responsible for the elevated Li, which appeared in some of the sampling sites and resulted in relatively high WQI values in the sites. The overall water quality of the Pumqu catchments was excellent. This study provides first-hand information on the overall spatial and temporal span of the physicochemical characteristics and water quality of all the catchments of the river Pumqu, one of the major water systems in the central Himalayas.

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Section: Hydrochemical Types and Their Controlling Factors In The Pcmentioning

confidence: 60%

Geochemical Characterization of the River Waters in the Pumqu Catchments, Central Himalayas

Yang

Chen

Renzeng³

et al. 2022

Water

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“…Most hydrogeochemical characteristics in the HKH already have been profoundly modified by climatic change along with other anthropogenic activities. For instance, in Nepal's west, many small‐scale river basins are potentially influenced by a sharp topographic variation, climatic and land‐use/cover changes with transport of toxic chemicals causing severe decline in water quality and quantity (Pant et al, 2021). Hydrogeochemical characteristics are strongly linked to a decline in the surface water quality resulting from many environmental factors including the increase in temperature, precipitation fluctuations, deforestation, urbanization, land‐use changes and exploitative mineral resource extraction (Bhat et al, 2021).…”

Section: Changing Himalayan Waterwaysmentioning

confidence: 99%

Reconfiguration of ecohydrology as a sustainability tool for Himalayan waterways

Kattel

2023

Ecohydrology

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Twenty first century faces unprecedented challenges for the management of global waterways. The Himalayan waterways in Asia are exposed to unpredictable climatic warming together with anthropogenic perturbations caused by population growth, land use change and socio‐economic development. Given the increased public concerns on the Himalayan Mountain development programmes including the hydropower and tourism, there has been a growing need of the use of interdisciplinary scientific approaches to address water resources challenges that the Himalayan region has faced during the 21st century. Ecohydrology is an emerging scientific tool that explores key hydrological processes regulating structure and function of ecosystems, as well as assessing the impact of biological processes on water cycle variables under rapidly changing environment. The International Geosphere‐Biosphere Programme and the International Hydrological Programme hosted by the United Nations Educational, Scientific and Cultural Organization have adopted ecohydrology as a sustainable development tool by linking water resources and poverty eradication and ecosystem restoration, irrigation, energy and sanitation. However, ecohydrology tool needs to be reconfigured for sustainable development of rapidly changing Himalayan waterways. Here we propose the advancement of ecohydrology by developing various integrated frameworks of ecology, hydrology, hydraulics and sociology for resilient waterways in the Asian Himalayas.

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Climate Change Impact on Hydrogeochemical Characteristics of Himalayan Glacier Meltwater

Kumar,

Singh

et al. 2024

Sustainable Development Goals Series

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Hydrochemical appraisal and solute acquisitions in Seti River Basin, Central Himalaya, Nepal

Cited by 11 publications

References 40 publications

Geochemical Characterization of the River Waters in the Pumqu Catchments, Central Himalayas

Geochemical Characterization of the River Waters in the Pumqu Catchments, Central Himalayas

Reconfiguration of ecohydrology as a sustainability tool for Himalayan waterways

Climate Change Impact on Hydrogeochemical Characteristics of Himalayan Glacier Meltwater

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