干旱区生态环境知识资源中心(Arid): Glacier area change and its impact on runoff in the Manas River Basin, Northwest China from 2000 to 2020

Arid

DOI	10.1007/s40333-024-0080-5
	Glacier area change and its impact on runoff in the Manas River Basin, Northwest China from 2000 to 2020
	Wang, Tongxia; Chen, Fulong; Long, Aihua; Zhang, Zhengyong; He, Chaofei; Lyu, Tingbo; Liu, Bo; Huang, Yanhao
通讯作者	Chen, FL
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2024
卷号	16 期号:7 页码:877-894
英文摘要	Understanding the distribution and dynamics of glaciers is of great significance to the management and allocation of regional water resources and socio-economic development in arid regions of Northwest China. In this study, based on 36 Landsat images, we extracted the glacier boundaries in the Manas River Basin, Northwest China from 2000 to 2020 using eCognition combined with band operation, GIS (geographic information system) spatial overlay techniques, and manual visual interpretation. We further analyzed the distribution and variation characteristics of glacier area, and simulated glacial runoff using a distributed degree-day model to explore the regulation of runoff recharge. The results showed that glacier area in the Manas River Basin as a whole showed a downward trend over the past 21 a, with a decrease of 10.86% and an average change rate of -0.54%/a. With the increase in glacier scale, the number of smaller glaciers decreased exponentially, and the number and area of larger glaciers were relatively stable. Glacier area showed a normal distribution trend of increasing first and then decreasing with elevation. About 97.92% of glaciers were distributed at 3700-4800 m, and 48.11% of glaciers were observed on the northern and northeastern slopes. The retreat rate of glaciers was the fastest (68.82%) at elevations below 3800 m. There was a clear rise in elevation at the end of glaciers. Glaciers at different slope directions showed a rapid melting trend from the western slope to the southern slope then to the northern slope. Glacial runoff in the basin showed a fluctuating upward trend in the past 21 a, with an increase rate of 0.03x108 m3/a. The average annual glacial runoff was 4.80x108 m3, of which 33.31% was distributed in the ablation season (June-September). The average annual contribution rate of glacial meltwater to river runoff was 35.40%, and glacial runoff accounted for 45.37% of the total runoff during the ablation season. In addition, precipitation and glacial runoff had complementary regulation patterns for river runoff. The findings can provide a scientific basis for water resource management in the Manas River Basin and other similar arid inland river basins.
英文关键词	glacier area glacial runoff climate change glacier boundary extraction distributed degree-day model Manas River Basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001282195300002
WOS关键词	PAST HALF-CENTURY ; TIANSHAN MOUNTAINS ; MASS-BALANCE ; TIEN-SHAN ; MELTWATER ; RETREAT
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404380
推荐引用方式 GB/T 7714	Wang, Tongxia,Chen, Fulong,Long, Aihua,et al. Glacier area change and its impact on runoff in the Manas River Basin, Northwest China from 2000 to 2020[J],2024,16(7):877-894.
APA	Wang, Tongxia.,Chen, Fulong.,Long, Aihua.,Zhang, Zhengyong.,He, Chaofei.,...&Huang, Yanhao.(2024).Glacier area change and its impact on runoff in the Manas River Basin, Northwest China from 2000 to 2020.JOURNAL OF ARID LAND,16(7),877-894.
MLA	Wang, Tongxia,et al."Glacier area change and its impact on runoff in the Manas River Basin, Northwest China from 2000 to 2020".JOURNAL OF ARID LAND 16.7(2024):877-894.