干旱区生态环境知识资源中心(Arid): Synthesizing the impacts of baseflow contribution on concentration-discharge (C-Q) relationships across Australia using a Bayesian hierarchical model

Arid

DOI	10.5194/hess-26-1-2022
	Synthesizing the impacts of baseflow contribution on concentration-discharge (C-Q) relationships across Australia using a Bayesian hierarchical model
	Guo, Danlu; Minaudo, Camille; Lintern, Anna; Bende-Michl, Ulrike; Liu, Shuci; Zhang, Kefeng; Duvert, Clement
通讯作者	Guo, DL (corresponding author)，Univ Melbourne, Dept Infrastruct Engn, Melbourne, Vic 3010, Australia.
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN	1027-5606
EISSN	1607-7938
出版年	2022
卷号	26 期号:1 页码:1-16
英文摘要	Understanding concentration-discharge (C - Q) relationships can inform catchment solute and particulate export processes. Previous studies have shown that the extent to which baseflow contributes to streamflow can affect C-Q relationships in some catchments. However, the current understanding on the effects of baseflow contribution in shaping the C-Q patterns is largely derived from temperate catchments. As such, we still lack quantitative understanding of these effects across a wide range of climates (e.g. arid, tropical and subtropical). The study aims to assess how baseflow contributions, as defined by the median and the range of daily baseflow indices within individual catchments (BFI_m and BEI_range, respectively), influence C-Q slopes across 157 catchments in Australia spanning five climate zones. This study focuses on six water quality variables: electrical conductivity (EC), total phosphorus (TP), soluble reactive phosphorus (SRP), total suspended solids (TSS), the sum of nitrate and nitrite (NO,) and total nitrogen (TN). The impact of baseflow contributions is explored with a novel Bayesian hierarchical model. For sediments and nutrient species (TSS, NOx, TN and TP), we generally see largely positive C-Q slopes, which suggest a dominance of mobilization export patterns. Further, for TSS, NOx and TP we see stronger mobilization (steeper positive C-Q slopes) in catchments with higher values in both the BEI_m and BFI range, as these two metrics are positively correlated for most catchments. The enhanced mobilization in catchments with higher BEI_m or BEI_range is likely due to the more variable flow pathways that occur in catchments with higher baseflow contributions. These variable flow pathways can lead to higher concentration gradients between low flows and high flows, where the former is generally dominated by groundwater/slow subsurface flow while the latter by surface water sources, respectively. This result highlights the crucial role of flow pathways in determining catchment exports of solutes and particulates. Our study also demonstrates the need for further studies on how the temporal variations of flow regimes and baseflow contributions influence flow pathways and the potential impacts of these flow pathways on catchment C-Q relationships.
类型	Article
语种	英语
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000739108500001
WOS关键词	HIGH-FREQUENCY WAVE ; TEMPORAL VARIABILITY ; WATER-QUALITY ; STREAM ; NITRATE ; EXPORT ; FLOW ; PHOSPHORUS ; SEDIMENT ; DYNAMICS
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376631
作者单位	[Guo, Danlu; Bende-Michl, Ulrike; Liu, Shuci] Univ Melbourne, Dept Infrastruct Engn, Melbourne, Vic 3010, Australia; [Minaudo, Camille] Ecole Polytech Fed Lausanne, Margaretha Kamprad Chair, Phys Aquat Syst Lab, Lausanne, Switzerland; [Lintern, Anna] Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia; [Bende-Michl, Ulrike] Bur Meteorol, Sci & Innovat Grp, Parkes, ACT 2600, Australia; [Liu, Shuci] Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing 210044, Peoples R China; [Zhang, Kefeng] UNSW Sydney, Sch Civil & Environm Engn, Water Res Ctr, Sydney, NSW 2052, Australia; [Duvert, Clement] Charles Darwin Univ, Res Inst Environm & Livelihoods, Darwin, NT, Australia; [Duvert, Clement] Natl Ctr Groundwater Res & Training NCGRT, Adelaide, SA, Australia
推荐引用方式 GB/T 7714	Guo, Danlu,Minaudo, Camille,Lintern, Anna,et al. Synthesizing the impacts of baseflow contribution on concentration-discharge (C-Q) relationships across Australia using a Bayesian hierarchical model[J],2022,26(1):1-16.
APA	Guo, Danlu.,Minaudo, Camille.,Lintern, Anna.,Bende-Michl, Ulrike.,Liu, Shuci.,...&Duvert, Clement.(2022).Synthesizing the impacts of baseflow contribution on concentration-discharge (C-Q) relationships across Australia using a Bayesian hierarchical model.HYDROLOGY AND EARTH SYSTEM SCIENCES,26(1),1-16.
MLA	Guo, Danlu,et al."Synthesizing the impacts of baseflow contribution on concentration-discharge (C-Q) relationships across Australia using a Bayesian hierarchical model".HYDROLOGY AND EARTH SYSTEM SCIENCES 26.1(2022):1-16.