干旱区生态环境知识资源中心(Arid): Understanding climate-induced changes of snow hydrological processes in the Kaidu River Basin through the CemaNeige-GR6J model

Arid

DOI	10.1016/j.catena.2022.106082
	Understanding climate-induced changes of snow hydrological processes in the Kaidu River Basin through the CemaNeige-GR6J model
	Hao, Yu; Sun, Fubao; Wang, Hong; Liu, Wenbin; Shen, Yan-Jun; Li, Zhi; Hu, Shunjun
通讯作者	Sun, FB
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	212
英文摘要	Snow-affected mountainous areas are highly vulnerable to climate changes in arid and semi-arid regions. Previous studies have put more emphasis on runoff, however, research about snow hydrological processes is still insufficient. Based on the optimization of calibration strategies, this study aims to provide a more realistic simulation of snow hydrology by coupling both a lumped rainfall-runoff model (GR6J) and a semi-distributed snow model (CemaNeige). Compared with calibration using only runoff, the multi-objective calibration with both runoff and snow not only significantly improved the KGE (Kling-Gupta efficiency) of snow from 0.34/0.47 to 0.67/0.69 during the calibration/validation period, but also slightly improved the KGE of runoff from 0.84/ 0.75 to 0.86/0.78, respectively. Additionally, we also found that the calibration using only runoff may underestimate snow cover (41%) and overestimate snowpack (20%), while there is little discrepancy in snowmelt and runoff. Snowmelt runoff is 57.7 mm accounting for 26% of the annual runoff. In the historical period (1980-2011), the runoff varied with a positive trend of 2.15 mm year-1 (p < 0.1), while its tendency became negative in the future. A 15% to 30% decline in runoff was projected for SSP370 (SSP3-RCP7) and SSP585 (SSP5RCP8.5) in the 2085s (2070-2100) compared with that in the 1985s (1970-2000). Through further study on seasonal variations, we found that the future runoff decline is probably due to mild rise in rain not enough to alleviate the larger AE (actual evaporation), and for the runoff and AE we also found the variations in summer dominated the annual changes. In response to global warming, SCED (snow cover end date) advances while SCOD (snow cover onset date) recedes in all four scenarios as the year increases. Generally, coupling different hydrological models and multi-objective calibration strategies is vital for understanding the hydrological processes in snow-affected catchments.
英文关键词	Hydrological model calibration Snow hydrology CemaNeige-GR6J Climate change Kaidu River Basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000790442800003
WOS关键词	TARIM RIVER ; DOMINATED CATCHMENTS ; SENSITIVITY-ANALYSIS ; SWAT MODEL ; PART 2 ; COVER ; RUNOFF ; PRECIPITATION ; TEMPERATURE ; CALIBRATION
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392082
推荐引用方式 GB/T 7714	Hao, Yu,Sun, Fubao,Wang, Hong,et al. Understanding climate-induced changes of snow hydrological processes in the Kaidu River Basin through the CemaNeige-GR6J model[J],2022,212.
APA	Hao, Yu.,Sun, Fubao.,Wang, Hong.,Liu, Wenbin.,Shen, Yan-Jun.,...&Hu, Shunjun.(2022).Understanding climate-induced changes of snow hydrological processes in the Kaidu River Basin through the CemaNeige-GR6J model.CATENA,212.
MLA	Hao, Yu,et al."Understanding climate-induced changes of snow hydrological processes in the Kaidu River Basin through the CemaNeige-GR6J model".CATENA 212(2022).