气候变化领域集成服务门户(CCPortal): Understanding hydrological processes of glacierized catchments in the western Himalayas by a multi-year tracer-based hydrograph separation analysis

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DOI	10.1002/hyp.15083
	Understanding hydrological processes of glacierized catchments in the western Himalayas by a multi-year tracer-based hydrograph separation analysis
	Dar, Tanveer; Rai, Nachiketa; Kumar, Sudhir; Bhat, Mohd Aadil
发表日期	2024
ISSN	0885-6087
EISSN	1099-1085
起始页码	38
结束页码	2
卷号	38 期号:2
英文摘要	Snow and glacier melt are significant contributors to streamflow in Himalayan catchments, and their increasing contributions serve as key indicators of climate change. Consequently, the quantification of these streamflow components holds significant importance for effective water resource management. In this study, we utilized the spatio-temporal variability of isotopic signatures in stream water, rainfall, winter fresh snow, snowpack, glaciers, springs, and wells, in conjunction with hydrometeorological observations and Snow Cover Area (SCA) data, to identify water sources and develop a conceptual understanding of streamflow dynamics in three catchments (Lidder, Sindh, and Vishow) within the western Himalayas. The following results were obtained: (a) endmember contributions to the streamflow exhibit significant spatial and seasonal variability across the three catchments during 2018-2020; (b) snowmelt dominates streamflow, with average contributions across the entire catchment varying: 59% +/- 9%, 55% +/- 4%, 56% +/- 6%, and 55% +/- 9% in Lidder, 43% +/- 6%, 38% +/- 6%, 32% +/- 4%, and 33% +/- 5% in Sindh and 45% +/- 8%, 40% +/- 6%, 39% +/- 6%, and 32% +/- 5% in Vishow during spring, summer, autumn, and winter seasons, respectively; (c) glacier melt contributions can reach similar to 30% to streamflow near the source regions during peak summer; (d) The primary uncertainties in streamflow components are attributed to the spatiotemporal variability of tracer signatures of winter fresh snow/snowpack (+/- 1.9% to +/- 20%); (e)regarding future streamflow components, if the glacier contribution were to disappear completely, the annual average streamflow in Lidder and Sindh could decrease up to similar to 20%. The depletion of the cryosphere in the region has led to a rapid increase in runoff (1980-1900), but it has also resulted in a significant streamflow reduction due to glacier mass loss and changes in peak streamflow over the past three decades (1990-2020). The findings highlight the significance of environmental isotope analysis, which provides insights into water resources and offers a critical indication of the streamflow response to glacier loss under a changing climate.
英文关键词	conceptual model; endmembers; hydrograph separation; spatiotemporal variability; stable isotopes; western Himalayas
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS记录号	WOS:001156899400001
来源期刊	HYDROLOGICAL PROCESSES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304875
作者单位	Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Roorkee; Tongji University; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Roorkee
推荐引用方式 GB/T 7714	Dar, Tanveer,Rai, Nachiketa,Kumar, Sudhir,et al. Understanding hydrological processes of glacierized catchments in the western Himalayas by a multi-year tracer-based hydrograph separation analysis[J],2024,38(2).
APA	Dar, Tanveer,Rai, Nachiketa,Kumar, Sudhir,&Bhat, Mohd Aadil.(2024).Understanding hydrological processes of glacierized catchments in the western Himalayas by a multi-year tracer-based hydrograph separation analysis.HYDROLOGICAL PROCESSES,38(2).
MLA	Dar, Tanveer,et al."Understanding hydrological processes of glacierized catchments in the western Himalayas by a multi-year tracer-based hydrograph separation analysis".HYDROLOGICAL PROCESSES 38.2(2024).