Arid
DOI10.1016/j.chemgeo.2017.01.015
Differences in groundwater and chloride residence times in saline groundwater: The Barwon River Catchment of Southeast Australia
Howcroft, William1; Cartwright, Ian1; Fifield, L. Keith2; Cendon, D. I.3,4
通讯作者Howcroft, William
来源期刊CHEMICAL GEOLOGY
ISSN0009-2541
EISSN1872-6836
出版年2017
卷号451页码:154-168
英文摘要

The residence times of groundwater and chloride and the processes contributing to the development of saline (total dissolved solids (TDS) up to 45,379 mg/L) groundwater within the Barwon River Catchment of southeast Australia were investigated using major ion, stable isotope (delta O-18, delta H-2, and delta C-13) and radioactive isotope (H-3, C-14, Cl-36) geochemistry. The elevated groundwater salinity in the region is primarily due to evapotranspiration and recycling of solutes in saline lakes with minor contributions from weathering of halite, silicate and calcite minerals. Groundwater residence times estimated from C-14 vary from modern to similar to 20 ka; for groundwater with lower C-14 activities, the estimated residence times vary significantly depending on the assumed flow model and the C-14 activity of recharge. Chloride residence times downgradient of Lake Murdeduke (a saline through-flow lake in the centre of the catchment) are greater than the corresponding groundwater residence times due to the recycling of Cl within the lake. Precise estimates of chloride residence time could not be determined using Cl-36 due to (RCl)-Cl-36 in precipitation being lower than that of groundwater. This is most likely due to (RCl)-Cl-36 values in rainfall having been higher in the past than they are at present due to climate variability. delta O-18, delta H-2, and delta C-13 values also suggest that the region has experienced increasingly more evaporative conditions with time. The results of this study demonstrate that, while Cl is a useful tracer of hydrological processes, it must be applied carefully in arid and semi-arid regions of the world. In particular, recharge rates calculated using chloride mass balance may be underestimated where recycling of Cl has occurred. Crown Copyright (C) 2017 Published by Elsevier B.V. All rights reserved.


英文关键词Groundwater Residence times Salinity Chlorine-36 Carbon-14 LPM
类型Review
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000394916900013
WOS关键词GREAT ARTESIAN BASIN ; OLD GROUNDWATER ; ENVIRONMENTAL ISOTOPES ; MURRAY BASIN ; CL-36 ; AQUIFER ; C-14 ; RECHARGE ; VICTORIA ; ORIGINS
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/198075
作者单位1.Monash Univ, Clayton Campus, SEAE, Rainforest Walk Bldg 28, Clayton, Vic 3800, Australia;
2.Australian Natl Univ, Res Sch Phys & Engn, Canberra, ACT 2601, Australia;
3.Australian Nucl Sci & Technol Org, Menai, NSW 2232, Australia;
4.UNSW, Sch Biol & Environm Sci, Sch Earth & Environm Sci, Connected Water Initiat, Sydney, NSW, Australia
推荐引用方式
GB/T 7714
Howcroft, William,Cartwright, Ian,Fifield, L. Keith,et al. Differences in groundwater and chloride residence times in saline groundwater: The Barwon River Catchment of Southeast Australia[J],2017,451:154-168.
APA Howcroft, William,Cartwright, Ian,Fifield, L. Keith,&Cendon, D. I..(2017).Differences in groundwater and chloride residence times in saline groundwater: The Barwon River Catchment of Southeast Australia.CHEMICAL GEOLOGY,451,154-168.
MLA Howcroft, William,et al."Differences in groundwater and chloride residence times in saline groundwater: The Barwon River Catchment of Southeast Australia".CHEMICAL GEOLOGY 451(2017):154-168.
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