A comparison of radon, heat tracer and head gradient methods to quantify surface water - groundwater exchange in a tidal wetland (Kooragang Island, Newcastle, Australia)

Sadat‐Noori, Mahmood; Anibas, Christian; Andersen, Martin S.; Glamore, William

doi:10.1016/j.jhydrol.2021.126281

Cited by 14 publications

(6 citation statements)

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“…Further, a few works also considered obtaining the hydraulic conductivity through slug tests [101], which would refine the study as information on stream bed properties would help understand the exchange process better. Many studies also used groundwater level maps to generate the hydraulic head data and obtain the hydraulic head from it [103][104][105]. The method was found to be widely popular among researchers across the world, with applications distributed evenly in different countries like Ethiopia, Italy, Denmark, England, China, and more.…”

Section: Discussion and Applicability Of The Methodsmentioning

confidence: 99%

“…O 18 and H 2 are the isotopes present in the rainfall; hence, if they get infiltrated into the groundwater, they can be tracked to understand the recharge phenomenon. Besides this, Radon ( 222 Rn) was also found to be used extensively [103,109,110] because this element is said to dissolve when in contact with the atmosphere like surface water but in groundwater, it is an exponentially growing element hence the interaction, can be estimated. In addition to these, elements of normal water chemistry like Na + , Ca 2+ , Mg 2+ , HCO − , and Cl − have been a way to understand the interaction and are found to be used in conjunction with other methods many a time [107,109,111].…”

Section: Discussion and Applicability Of The Methodsmentioning

confidence: 99%

“…Temperature depth profiles are built to find the stream bed flux. T-arrays were also found to be successfully producing the time series [103] with the help of a temperature logger fitted in the arrangement. Many of the works were found to be done paired with some other approaches, Passadore [117] used the Darcy approach along with the heat tracer method in which thermal monitoring of fluxes through the river bed was done and verified with Darcy's outcomes.…”

Section: Discussion and Applicability Of The Methodsmentioning

confidence: 99%

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A Review on the Research Advances in Groundwater–Surface Water Interaction with an Overview of the Phenomenon

Banerjee

Ganguly

2023

Water

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Groundwater and surface water, though thought to be different entities in the past, are connected throughout the different landforms of the world. Despite being studied for quite some time, the interaction between groundwater and surface water (GW–SW) has received attention recently because of the heavy exploitation of both of these resources. This interaction is responsible for a phenomenon like contaminant transport, and understanding it helps to estimate the effects of climate change, land use on chemical behavior, and the nature of water. Hence, knowledge of GW–SW interactions is required for hydrologists to optimize resources and analyze the related processes. In this review article, different aspects of the interaction are discussed. Starting from the basics of the phenomenon, this work highlights the importance of GW–SW interactions in the hydrological cycle. Different mechanisms of GW–SW interactions are briefly examined to describe the phenomenon. The scales of interaction are also elucidated where the classification is addressed along with a brief introduction to the large scale and sediment reach scales. The study then moves on to the investigation methodologies used for the process of SW–GW interaction and their classifications based on whether they are field methods or modeling techniques. Various literature is then explored in terms of research approaches. Finally, we highlight the applicability of the methods for different scenarios. This work is aimed to summarize advances made in the field, finding research gaps and suggest the way forward, which would be helpful for hydrologists, policymakers and practicing engineers for planning water resources development and management.

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Section: Discussion and Applicability Of The Methodsmentioning

confidence: 99%

Section: Discussion and Applicability Of The Methodsmentioning

confidence: 99%

Section: Discussion and Applicability Of The Methodsmentioning

confidence: 99%

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A Review on the Research Advances in Groundwater–Surface Water Interaction with an Overview of the Phenomenon

Banerjee

Ganguly

2023

Water

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“…In this context, the acquisition of constraining data (e.g., tracers) to increase the reliability of the variables and parameters (permeability, recharge, dispersivity…) is fundamental to improve the model quality (Delottier et al, 2017;Cousquer et al, 2018;Gardner et al, 2011;Fleckenstein et al, 2010). Although tracers can be individually used, the information obtained by combining different techniques (tracers) can validate the results and overcome the limitations of a single method (Dujardin et al, 2014;Gilfedder et al, 2015;Xie et al, 2016;Stellato et al, 2008;Sadat-noori et al, 2021;Gardner et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Groundwater-Surface water exchanges in an alluvial plain subjected to pumping: a coupled multitracer and modeling approach

Texier,

Gonçalvès,

Stieglitz

et al. 2024

Preprint

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Abstract. Alluvial aquifers represent a vital water resource for many regions. However, understanding and characterizing the interactions between rivers and these aquifers is a major challenge for researchers and water managers. This characterization, in terms of flow velocity or water supply, is important to identify the vulnerability of the aquifers. In this study, our goal is to improve the understanding of interactions between rivers and alluvial aquifers by combining a multi-tracer approach with numerical modeling. By integrating these two complementary methods, we aim to accurately quantify the exchanges between groundwater and surface water, and to identify the water sources contributing to aquifer recharge. This combined approach allows a better quantification of river-aquifer interactions at local scale, in the context of groundwater exploitation by pumping along the river. A large drinking water catchment field located on the banks of the Rhône River, in the southeast of France, was chosen as the study site. This site consists of several pumping wells and observation piezometers parallel to the Rhône. As often, with alluvial aquifer exploitation close to a river, the pumping leads to flow from surface water to groundwater. Groundwater temperature, piezometric levels and river surface water levels were continuously recorded for an 18-month period. During field campaigns, conductivity, stable isotopes of water and radon activity of groundwater and surface water were measured. Radon was applied in a new way to measure the water flow from the river to the aquifer, which reduces the natural radon signal in the aquifer by radon-poor waters from a river. On the site, the radon data clearly delineates groundwater recharge from the river within 50 meters from the banks. The methodology to interpret periodic groundwater temperature signals was extended to the isotopic signal, making it possible to identify the dispersivity in addition to Darcy's velocity. All the experimental data were accounted for in a synthetic MODFLOW model, taking into account the boundary effect of the Ouvèze and Rhone rivers. Model calibration was made using the piezometric records and the PEST package. Reactive transport of radon was implemented using MT3DMS to ascertain the overall water balance of the study site. In addition to the Rhône as a supply, we have shown that the other river (Ouvèze) also contributes of the site’s supply (around 55%). By improving our understanding of the interactions between rivers and alluvial aquifers, this study offers valuable insights for sustainable water resource management in regions similar to our study site, i.e., the case of a losing river recharging an exploited aquifer and demonstrates the value of natural tracers, such as radon or stable water isotopes, in situations where the application of artificial tracers is impractical. Our results can guide policy decisions regarding groundwater development and river ecosystem protection.

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“…is the most important isotope that can be transported from the depths of the ground to the surface without reacting with other types of atoms. Due to its density and radioactive properties, the radon gas in the ground can be used to detect rock types or evaluate the subsurface flows to predict the productivity of the ecological zoning [1]. Through this transport mechanism, radon produced in the ground is potentially hazardous to lung health when transported to the surface and inhaled by humans [2].…”

Section: Introduction mentioning

confidence: 99%

A Two-Dimensional Unsteady FDTD Model for Radon Transport with Multiple Sources Emanation from Soil Layers

et al. 2023

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A two-dimensional numerical model for radon transport based on the finite difference time domain (FDTD) method have been developed. The model is governed by the radon transport equation taking into account the mechanisms of diffusion, advection, and decay. The purpose of this model is to simulate the evolution of radon concentration which can be influenced by various parameters including depth and diffusion coefficient of the soil layer plus the velocity and initial concentration of radon. The obtained results were compared to an analytical solution to demonstrate the ability of this model for predicting the spatio-temporal evolution of radon transport in the porous media of soil layers.

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A comparison of radon, heat tracer and head gradient methods to quantify surface water - groundwater exchange in a tidal wetland (Kooragang Island, Newcastle, Australia)

Cited by 14 publications

References 91 publications

A Review on the Research Advances in Groundwater–Surface Water Interaction with an Overview of the Phenomenon

A Review on the Research Advances in Groundwater–Surface Water Interaction with an Overview of the Phenomenon

Groundwater-Surface water exchanges in an alluvial plain subjected to pumping: a coupled multitracer and modeling approach

A Two-Dimensional Unsteady FDTD Model for Radon Transport with Multiple Sources Emanation from Soil Layers

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