气候变化领域集成服务门户(CCPortal): Assessing the snow cover dynamics and its relationship with different hydro-climatic characteristics in Upper Ganges river basin and its sub-basins

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DOI	10.1016/j.scitotenv.2021.148648
	Assessing the snow cover dynamics and its relationship with different hydro-climatic characteristics in Upper Ganges river basin and its sub-basins
	Thapa, Sahadeep; Zhang, Fan; Zhang, Hongbo; Zeng, Chen; Wang, Li; Xu, Chong-Yu; Thapa, Amrit; Nepal, Santosh
通讯作者	Zhang, F (通讯作者)
发表日期	2021
ISSN	0048-9697
EISSN	1879-1026
卷号	793
英文摘要	Snowmelt is an important source of water in upstream part of the Ganges river basin (GRB), which provides water for different purposes to its 655 million inhabitants. However, studies assessing relationship between snow cover dynamics and changes in hydro-climatic variables are limited within this region, motivating the current research. In this study, MODIS snow cover product (MOD10A1) was used to assess the snow cover area (SCA) dynamics within the Upper Ganges river basin (UGRB) and its sub-basins for the time period of 2002-2014; available climate and hydrological data were used to assess the hydrological characteristics within three selected sub-basins in Nepal; and relationships between snow cover and different hydro-climatic variables are established for three sub-basins owing to availability of hydro-climatic data. Results show that the average annual maximum SCA is around 24.6-47.5% for UGRB and its sub-basins. Upper Yamuna river basin (UYRB) with lowest mean elevation among the sub-basins shows a single SCA peak in spring within an annual cycle, whereas UGRB and the higher sub-basins show an additional lower peak in fall mainly resulted from snow sublimation. During 2002-2014, SCA shows slight decreasing trends for UGRB (Kendall's Tau Tau = -0.039) and the higher elevation zones B (3001-4500 m a.s.l.) and C (>4500 m a.s.l.) of most sub-basins, with significance in Zone C of SaRB (Tau = -0.070) and KoRB (Tau = -0.062). Annual discharge for Gandaki river basin (GaRB) and Koshi river basin (KoRB) shows non-significant decreasing trends (Tau = -0.182, -0.303) which are resulted from decreasing discharge in different seasons in different sub-basins. Seasonal correlation analysis indicates an important water supply from rainfall in GaRB and combined water supply from rainfall and snowmelt in KoRB, along with dominant contribution of precipitation in monsoon months and snowmelt in non-monsoon months for all the three sub-basins. (c) 2021 Elsevier B.V. All rights reserved.
关键词	HIGH-MOUNTAIN ASIA HYDROLOGICAL REGIME AIR-TEMPERATURE GLACIER MELT HIGH ALPINE DRY ANDES WATER DISCHARGE TRENDS ELEVATION
英文关键词	Upper Ganges river basin; Snow cover dynamics; Hydrology; Climate
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000691668800005
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260499
推荐引用方式 GB/T 7714	Thapa, Sahadeep,Zhang, Fan,Zhang, Hongbo,et al. Assessing the snow cover dynamics and its relationship with different hydro-climatic characteristics in Upper Ganges river basin and its sub-basins[J]. 中国科学院青藏高原研究所,2021,793.
APA	Thapa, Sahadeep.,Zhang, Fan.,Zhang, Hongbo.,Zeng, Chen.,Wang, Li.,...&Nepal, Santosh.(2021).Assessing the snow cover dynamics and its relationship with different hydro-climatic characteristics in Upper Ganges river basin and its sub-basins.SCIENCE OF THE TOTAL ENVIRONMENT,793.
MLA	Thapa, Sahadeep,et al."Assessing the snow cover dynamics and its relationship with different hydro-climatic characteristics in Upper Ganges river basin and its sub-basins".SCIENCE OF THE TOTAL ENVIRONMENT 793(2021).