干旱区生态环境知识资源中心(Arid): A New Approach for Assessing Groundwater Recharge by Combining GRACE and Baseflow With Case Studies in Karst Areas of Southwest China

Arid

DOI	10.1029/2022WR032091
	A New Approach for Assessing Groundwater Recharge by Combining GRACE and Baseflow With Case Studies in Karst Areas of Southwest China
	Huang, Zhiyong; Yeh, Pat J. -F.; Jiao, Jiu Jimmy; Luo, Xin; Pan, Yun; Long, Yuannan; Zhang, Chong; Zheng, Longqun
通讯作者	Jiao, JJ
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2023
卷号	59 期号:2
英文摘要	A new approach combining groundwater storage change (GWSC) derived from Gravity Recovery and Climate Experiment (GRACE) satellite data and baseflow was proposed to estimate groundwater recharge at large spatial scales but a short (monthly) time scale. This method was applied in two typical karst basins of southwest China, the Wujiang River basin (WRB, & SIM;87,900 km(2), & SIM;70% karstification) and Xijiang River Basin (XRB, & SIM;360,000 km(2), & SIM;44% karstification). The 2006-2012 monthly baseflow was first separated from in situ streamflow through multivariate regression analysis. Groundwater recharge was estimated using separated baseflow and GWSC estimated from GRACE data and observation-based groundwater-level data. The comparison between GRACE- and observation-based recharge in the larger XRB shows better consistency, while that in the smaller WRB shows larger discrepancies. Considering the associated uncertainty (60-93 mm/yr), the 2006-2012 mean recharge in two basins, ranging 199-225 mm/yr (17%-19% of precipitation) is comparable to bulletin-reported estimates (& SIM;145 mm/yr). Both the degree of karstification and aquifer water table depth influence recharge and discharge processes in karst areas of southwest China. The more karstic WRB exhibits more rapid infiltration (due to more developed permeable epikarst zone) and higher discharge capability (due to more developed underground drainage systems), particularly during dry periods (2009, 2011, and winter). Baseflow exhibits a shorter time lag to recharge and GWSC in the XRB than WRB owing to more quick flow, lower storage with more rapid infiltration, and shorter mean groundwater residence time. Observation-based monthly recharge reflects different rainfall-infiltration-runoff processes under different rainfall intensities, particularly in the WRB.
英文关键词	groundwater recharge baseflow separation groundwater storage change karst GRACE water table depth
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000949529900006
WOS关键词	UNSATURATED-ZONE ; RESIDENCE TIME ; ARID REGION ; FLOW ; DROUGHT ; RIVER ; DEPLETION ; MODEL ; BASIN ; EVAPOTRANSPIRATION
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/399150
推荐引用方式 GB/T 7714	Huang, Zhiyong,Yeh, Pat J. -F.,Jiao, Jiu Jimmy,et al. A New Approach for Assessing Groundwater Recharge by Combining GRACE and Baseflow With Case Studies in Karst Areas of Southwest China[J],2023,59(2).
APA	Huang, Zhiyong.,Yeh, Pat J. -F..,Jiao, Jiu Jimmy.,Luo, Xin.,Pan, Yun.,...&Zheng, Longqun.(2023).A New Approach for Assessing Groundwater Recharge by Combining GRACE and Baseflow With Case Studies in Karst Areas of Southwest China.WATER RESOURCES RESEARCH,59(2).
MLA	Huang, Zhiyong,et al."A New Approach for Assessing Groundwater Recharge by Combining GRACE and Baseflow With Case Studies in Karst Areas of Southwest China".WATER RESOURCES RESEARCH 59.2(2023).