Breakthrough curves of dye tracing tests in karst aquifers: Review of effective parameters based on synthetic modeling and field data

Peely, Ahmad Behrouj; Mohammadi, Zargham; Raeisi, Ezzat

doi:10.1016/j.jhydrol.2021.126604

Cited by 7 publications

(2 citation statements)

References 54 publications

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“…For instance, the karst aquifers characterized by (relatively) younger water age (i.e., shorter travel time) are often at the risk of contamination problem due to the system's rapid response whilst the karst systems represented with older groundwater ages (i.e., longer residence time) is often an indication of the sufficient time for the contaminant attenuation processes (Figure 3). Artificial tracer test is powerful tool to estimate the karst system's hydraulic properties (i.e., porosity, hydraulic conductivity, conduit volumes) and transport parameters (i.e., dispersion, mass exchange rate, sorption) (Aquilanti et al, 2003;Mudarra et al, 2019;Lauber et al, 2014;Peely et al, 2021;Perrin & Luetscher, 2008). In these tests, the investigation scale is very often a key factor in characterizing and quantifying the karst system's flow and transport characteristics.…”

Section: Spreading Dilution and Reactive Mixingmentioning

confidence: 99%

Karst water resources in a changing world: Review of solute transport modelling approaches

Çallı,

Chiogna,

Bittner

et al. 2024

Preprint

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Karst water resources are valuable freshwater sources for around 10 % of the world population. Nonetheless, anthropogenic factors and global changes have been seriously deteriorating the karst water quality and dependent ecosystems. Solute transport models are powerful tools to monitor, control, and manage the water quality and dependent ecosystem functioning. By representing and predicting the spatiotemporal behavior of solute migration in karst systems, the transport models enhance our understanding about the karst transport processes, thus enabling us to explore contamination risks and potential outcomes. This paper reviews the current state of knowledge on the modelling of solute transport processes in karst aquifers, thereby unveiling the fundamental challenges underlying a successful karst transport modelling. We discuss to what extent and in what ways we can handle these challenges and derive the key challenges and directions for reliable modelling of transport processes in karst systems in the present context of global changes.

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Section: Spreading Dilution and Reactive Mixingmentioning

confidence: 99%

Karst water resources in a changing world: Review of solute transport modelling approaches

Çallı,

Chiogna,

Bittner

et al. 2024

Preprint

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“…The characteristics of the karst systems in each part of the Zagros region are highly dependent on the local geological and hydrogeological setting [32]. Therefore, mathematical simulation of the hydrogeological system of its aquifers for spring discharge forecasting can be time consuming and not sufficiently robust to investigate climate conditions out of the range of climate conditions observed within the calibration period.…”

Section: Introductionmentioning

confidence: 99%

A New Index to Assess the Effect of Climate Change on Karst Spring Flow Rate

Behrouj Peely,

Mohammadi,

Sivelle

et al. 2024

Sustainability

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Karstic aquifers, because of their conduit system, are susceptible to climate change. Ten karst springs in the Zagros region were selected to investigate the impact of climate change under three CMIP6 scenarios: SSP1-1.9, SSP2-4.5, and SSP5-8.5. This study was conducted in three steps: downscaling climate projection, analyzing spring discharge time series, and introducing a new index to assess the impact of climate change on spring flow rate. Applying LARS-WG6, precipitation was downscaled at 14 stations in the study area. Moreover, time series and trend analysis showed that the selected springs have experienced a decrease in their flow rate. Assuming the covariance function between precipitation and spring discharge is constant, new indices (i.e., IQd, IdQd, and Icc) were introduced to highlight the effect of climate change according to the three scenarios. dQd is the variability of spring discharge from past to future, IdQd is spring discharge variability over the historical data, and Icc is the effect of precipitation and spring discharge change together. Icc has a range from −0.25 to 0.25 below and above, which is indicative that two extreme conditions including the spring dryness and overflow are in effect, respectively. The main results revealed that the degree of impact at each spring is a function of climate change scenarios and hydrogeological characteristics of the karstic systems. A more noticeable negative trend in spring flow rate is observed for the karst springs characterized by a dominant conduit flow regime and low matrix storage, located in the areas with low cumulative rainfall, and has a stronger relationship with precipitation. Based on the results, decisions on the management of karst water resources should be made considering where the springs bear free surface and pressurized flow conditions.

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A review of tracer testing techniques in porous media specially attributed to the oil and gas industry

Patidar

Joshi

Dristant

et al. 2022

J Petrol Explor Prod Technol

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The significance of the tracer testing technique is widely accepted in reservoir performance analysis in hydrology as well as in hydrocarbon exploration and production. The subsurface reservoir delineation for hydrocarbon exploration and optimum production is one of the most critical aspects of petroleum system analysis. The quality of the reservoir and its performance prediction require extensive knowledge of qualitative reservoir geology, its depositional environment, facies heterogeneity and engineering properties of subsurface formations. Tracer testing is amongst the few techniques available in the oil and gas (O&G) industry, which stands up to these expectations and is successfully used for quantitative determination and analysis of sub-seismic scale structural and stratigraphic heterogeneities. Tracer testing is also being utilized in determining residual oil saturation (Sor) and lateral correlation of reservoir properties in the subsurface. Apart from the O&G industry, the concentration-based applications of tracer testing have been proved in hydrology, geothermal and medical science. A comprehensive review is presented to explain the application of tracer testing technique to investigate porous media, mainly in O&G industry. The type of tracers used, their selection criteria, concentration, and natural versus gradient and qualitative to a quantitative application are discussed in the current review. Generally, two types of tracers (chemical and radioactive) are preferred in the petroleum industry for gas/fluid flow assessment, waterflood optimization and establishing connectivity between multiple wells. The current paper reviews both types of tracer tests, namely single well and inter well, in detail discussing the objectives, calculations, designing, injection, sampling, laboratory analysis and knowledge integration. The preliminary aim was to provide a review of the tracer testing technique used in reservoir evaluation and well-to-well connectivity analysis.

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Breakthrough curves of dye tracing tests in karst aquifers: Review of effective parameters based on synthetic modeling and field data

Cited by 7 publications

References 54 publications

Karst water resources in a changing world: Review of solute transport modelling approaches

Karst water resources in a changing world: Review of solute transport modelling approaches

A New Index to Assess the Effect of Climate Change on Karst Spring Flow Rate

A review of tracer testing techniques in porous media specially attributed to the oil and gas industry

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