Radon, CO2 and CH4 as environmental tracers in groundwater/surface water interaction studies − comparative theoretical evaluation of the gas specific water/air phase transfer kinetics

2015 ◽  
Vol 224 (4) ◽  
pp. 709-715 ◽  
Author(s):  
M. Schubert ◽  
A. Paschke
Keyword(s):  
Surface Water ◽  
Phase Transfer ◽  
Environmental Tracers ◽  
Theoretical Evaluation ◽  
Water Interaction ◽  
Interaction Studies ◽  
Groundwater Surface Water Interaction

scholarly journals The use of Radon (Rn222) isotopes to detect groundwater discharge in streams draining Table Mountain Group (TMG) aquifers

Water SA ◽  
2021 ◽  
Vol 47 (2 April) ◽  
Author(s):  
T Strydom ◽  
JM Nel ◽  
M Nel ◽  
RM Petersen ◽  
CL Ramjukadh
Keyword(s):  
Surface Water ◽  
Water Discharge ◽  
Environmental Isotopes ◽  
Fractured Aquifer ◽  
Aquifer System ◽  
Water Interaction ◽  
Table Mountain ◽  
Interaction Studies ◽  
Aquifer Systems ◽  
Groundwater Surface Water Interaction

Environmental isotopes have been used for decades as natural tracers in studies aimed at understanding complex hydrogeological processes such as groundwater and surface water interactions. Radon (Rn222) is a naturally occurring, radioactive isotope which is produced from radium (Ra226) during the radioactive decay series of uranium (U238). Since U238 is present in most geological substrates, Rn222 is produced in various lithological structures and subsequently transported with groundwater through fractures and pore spaces in an aquifer towards surface water discharge points in rivers and springs. This study aimed to determine (i) the concentration of Rn222 within both surface water and groundwater in Table Mountain Group (TMG) aquifer systems, and (ii) the feasibility of using Rn222 isotopes as a natural tracer in groundwater-surface water interaction studies. This study was conducted in a highly fractured TMG aquifer system near Rawsonville, South Africa. Surface water from two perennial rivers (i.e. Gevonden and Molenaars), together with groundwater from a nearby borehole, were sampled and their corresponding Rn222 concentrations measured. Our study found median Rn222 concentrations in the Gevonden River of 76.4 Bq∙L-1 and 67.2 Bq∙L-1 in the dry and wet seasons, respectively. Nearly 12% of surface water samples exceeded 100 Bq∙L-1.  These abnormally high Rn222 concentrations can only be attributed to the influx of groundwater with extremely high Rn222 concentrations. Under ambient (no pumping) conditions, Rn222 concentrations in groundwater range between 130–270 Bq∙L-1. However, when the borehole was pumped, and inflowing water from the surrounding aquifer was sampled, even higher Rn222 concentrations (391–593 Bq∙L-1) were measured. These extremely high Rn222 concentrations in groundwater are believed to be attributed to the underlying granitic geology and the prevalence of faults. The use of Rn222 isotopes as an environmental tracer in groundwater–surface water interaction studies is therefore regarded as a feasible option in similar highly fractured aquifer systems.

USING GEOCHEMICAL METHODS TO TRACE GROUNDWATER/SURFACE WATER INTERACTION

2019 ◽  
Author(s):  
Bronson McQueen ◽  
◽  
Elizabeth A. Avery ◽  
Junfeng Zhu ◽  
Alan Fryar ◽  
...  
Keyword(s):  
Surface Water ◽  
Water Interaction ◽  
Groundwater Surface Water Interaction

Temporal dynamics of groundwater-surface water interaction under the effects of climate change: A case study in the Kiskatinaw River Watershed, Canada

2017 ◽  
Vol 551 ◽  
pp. 440-452 ◽  
Author(s):  
Gopal Chandra Saha ◽  
Jianbing Li ◽  
Ronald W. Thring ◽  
Faye Hirshfield ◽  
Siddhartho Shekhar Paul
Keyword(s):  
Climate Change ◽  
Surface Water ◽  
Temporal Dynamics ◽  
River Watershed ◽  
Water Interaction ◽  
Groundwater Surface Water Interaction

Delineation of spatial-temporal patterns of groundwater/surface-water interaction along a river reach (Aa River, Belgium) with transient thermal modeling

2017 ◽  
Vol 26 (3) ◽  
pp. 819-835 ◽  
Author(s):  
Christian Anibas ◽  
Abebe Debele Tolche ◽  
Gert Ghysels ◽  
Jiri Nossent ◽  
Uwe Schneidewind ◽  
...  
Keyword(s):  
Surface Water ◽  
Thermal Modeling ◽  
Temporal Patterns ◽  
Water Interaction ◽  
River Reach ◽  
Groundwater Surface Water Interaction ◽  
Transient Thermal

scholarly journals Groundwater-surface water interaction; its effects on material transport and ecosystems

2018 ◽  
Vol 60 (2) ◽  
pp. 139-141
Author(s):  
Mitsuyo SAITO ◽  
Shin-ichi ONODERA ◽  
Takeo TSUCHIHARA
Keyword(s):  
Surface Water ◽  
Material Transport ◽  
Water Interaction ◽  
Groundwater Surface Water Interaction
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