DOI: 10.5194/hess-18-5109-2014
Scopus记录号: 2-s2.0-84918517391
论文题名: Residence times and mixing of water in river banks: Implications for recharge and groundwater-surface water exchange
作者: Unland N ; P ; , Cartwright I ; , Cendón D ; I ; , Chisari R
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 12 起始页码: 5109
结束页码: 5124
语种: 英语
Scopus关键词: Aquifers
; Banks (bodies of water)
; Floods
; Groundwater geochemistry
; Groundwater resources
; Hydrochemistry
; Infiltration
; Mixing
; Rivers
; Saline water
; Confined aquifers
; Exchange process
; Groundwater chemistry
; Groundwater residence
; Groundwater-surface waters
; Ion concentrations
; River-groundwater interactions
; Southeast australia
; Recharging (underground waters)
; groundwater-surface water interaction
; hydrogeology
; infiltration
; mixing
; peak flow
; recharge
; residence time
; river bank
; water storage
; Australia
; Tambo River
; Victoria [Australia]
英文摘要: Bank exchange processes within 50 m of the Tambo River, southeast Australia, have been investigated through the combined use of 3H and 14C. Groundwater residence times increase towards the Tambo River, which suggests the absence of significant bank storage. Major ion concentrations and δ2H and δ18O values of bank water also indicate that bank infiltration does not significantly impact groundwater chemistry under baseflow and post-flood conditions, suggesting that the gaining nature of the river may be driving the return of bank storage water back into the Tambo River within days of peak flood conditions. The covariance between 3H and 14C indicates the leakage and mixing between old (~17 200 years) groundwater from a semi-confined aquifer and younger groundwater (<100 years) near the river, where confining layers are less prevalent. It is likely that the upward infiltration of deeper groundwater from the semi-confined aquifer during flooding limits bank infiltration. Furthermore, the more saline deeper groundwater likely controls the geochemistry of water in the river bank, minimising the chemical impact that bank infiltration has in this setting. These processes, coupled with the strongly gaining nature of the Tambo River are likely to be the factors reducing the chemical impact of bank storage in this setting. This study illustrates the complex nature of river groundwater interactions and the potential downfall in assuming simple or idealised conditions when conducting hydrogeological studies. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78042
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: School of Earth, Atmosphere and Environment, Monash University, Clayton, VIC, Australia; National Centre for Groundwater Research and Training, School of Environment, Flinders University, Adelaide, SA, Australia; Australian Nuclear Science and Technology Organisation, Kirrawee DC, NSW, Australia; School of Biology, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, Australia
Recommended Citation:
Unland N,P,, Cartwright I,et al. Residence times and mixing of water in river banks: Implications for recharge and groundwater-surface water exchange[J]. Hydrology and Earth System Sciences,2014-01-01,18(12)