气候变化领域集成服务门户(CCPortal): Seasonal dynamics of water and sediment in the permafrost basin of the Qinghai-Tibet plateau and its driving factors

CCPortal

DOI	10.1002/hyp.15138
	Seasonal dynamics of water and sediment in the permafrost basin of the Qinghai-Tibet plateau and its driving factors
发表日期	2024
ISSN	0885-6087
EISSN	1099-1085
起始页码	38
结束页码	4
卷号	38 期号:4
英文摘要	Climate change has regulated cryosphere-fed rivers and altered interannual and seasonal sediment dynamics, with significant implications for terrestrial material cycles and downstream aquatic ecosystems. However, there has been a notable scarcity of research focusing on the patterns of water-sediment transport within these permafrost zones. Integrating 6 years (2017-2022) of in-situ observational data from FengHuoShan basin with the partial least squares-structural equation modelling (PLS-SEM) method, we analyse the driving factors, characteristics and seasonal patterns of the water-sediment transport process. We observed a gradual increase in both suspended sediment flux (SSF, Mt/yr) and runoff (Q, km(3)/yr) within the basin, with annual growth rates of 1.34%/yr and 0.75%/yr, respectively. It is worth noting that these growth rates exhibit seasonal variations, with the highest values observed in spring (SSF: 1.76%/yr, Q: 1.71%/yr). This indicates that the response to climate change is more pronounced in spring compared with summer and autumn. Through mathematical statistics and the PLS-SEM model, we found that temperature plays a predominant role in the dynamics of water-sediment in both spring and autumn, whereas rainfall exerts a more significant impact during the summer. Most suspended sediment concentration (SSC, kg/m(3)) peak events throughout the year are primarily driven by rainfall. Affected by the freeze-thaw cycle of permafrost, SSC and discharge (Q, m(3)/s) exhibit distinct seasonality. SSC and Q demonstrate a clockwise trend; both Q and SSC begin to increase from May and peak in August before declining. The insights gleaned from this study hold significant implications for water resource management and soil conservation strategies in the region, particularly in the face of ongoing climatic changes characterized by warming and increased humidity.
英文关键词	climate change; discharge; permafrost; permafrost thawing; suspended sediment concentration; suspended sediment flux
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS记录号	WOS:001197021500001
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/285517
作者单位	Sichuan University; Sichuan University
推荐引用方式 GB/T 7714	. Seasonal dynamics of water and sediment in the permafrost basin of the Qinghai-Tibet plateau and its driving factors[J],2024,38(4).
APA	(2024).Seasonal dynamics of water and sediment in the permafrost basin of the Qinghai-Tibet plateau and its driving factors.HYDROLOGICAL PROCESSES,38(4).
MLA	"Seasonal dynamics of water and sediment in the permafrost basin of the Qinghai-Tibet plateau and its driving factors".HYDROLOGICAL PROCESSES 38.4(2024).

条目包含的文件
条目无相关文件。

个性服务

谷歌学术

百度学术

必应学术

相关权益政策

收藏/分享