Simulating groundwater flow in karst aquifers with distributed parameter models—Comparison of porous-equivalent media and hybrid flow approaches

Kuniansky, Eve L.

doi:10.3133/sir20165116

Cited by 25 publications

(12 citation statements)

References 14 publications

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“…In contrast, distributed models take complex parameters involved in groundwater flow and transport into account. In these models, dependent hydrological parameters and boundary conditions can be spatiotemporally variable and this will require the equations to be solved numerically and based on partial differential equations (Asher et al, 2015; Kuniansky, 2016). Also, due to the fact that all variables should be defied to the system, collecting more data and paying careful attention to details in this type of modeling is demanded which can make it more challenging (Dong et al, 2012; Long and Gilcrease, 2009).…”

Section: Application Of Modeling In Karstmentioning

confidence: 99%

Assessment of groundwater quality and remediation in karst aquifers: A review

Kalhor

Ghasemizadeh

Rajić

et al. 2019

Groundwater for Sustainable Development

165

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Karst aquifers, capable of storing and transmitting large amount of water, are the main source of drinking water in many regions worldwide. Their excessive permeability leads to an enhanced vulnerability to retain and spread the contamination accordingly. From sustainability perspective, the environmental, economic and social impacts of karst contamination on water resources management are gaining more attention. In this study, an overview of hydrogeological processes and concepts regarding groundwater flow and contaminant transport in karstic systems is presented, followed by a short discussion on surface water and groundwater interaction. Due to the complexity of karstic systems, different approaches have been developed by researchers for investigating and understanding hydrogeological processes and groundwater behavior in karst which are reviewed herein. Additionally, groundwater contamination issues and the most common and effective remediation techniques in karstic terrains are discussed. Lastly, modeling techniques and remote sensing methods, as beneficial and powerful tools for assessing groundwater flow and contaminant transport in karst terrains, are reviewed and evaluated. In each section, relevant research works conducted for Puerto Rico are discussed and some recommendations are presented to complement the ongoing hydrogeological investigations on this island.

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Section: Application Of Modeling In Karstmentioning

confidence: 99%

Assessment of groundwater quality and remediation in karst aquifers: A review

Kalhor

Ghasemizadeh

Rajić

et al. 2019

Groundwater for Sustainable Development

165

View full text Add to dashboard Cite

show abstract

“…Karst terrains undergo considerable dissolution to create and enlarge joints, fractures, bedding planes, and other open-ings in which groundwater flows. These terrains show dis-tinctive surface and subsurface features associated with sinkholes, springs, caves, and sinking, losing, and gaining streams, which are characterized by welldeveloped conduit networks having high connectivity (e.g., Xu et al 2015a, b) and/or highly transmissive zones (e.g., Kuniansky 2016). These characteristics make some karst groundwater sys-tems highly productive and become important freshwater resources for human consumption and ecological integrity of streams, wetlands, and coastal zones (Padilla and Vesper 2018;White 2018).…”

Section: Introductionmentioning

confidence: 99%

Characterization, modeling, and remediation of karst in a changing environment

Masséi

Padilla

et al. 2018

Environ Earth Sci

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This introductory editorial paper provides a review and prospective outlook of the achievements and challenges in karst research under a changing environment. A brief discussion of the past and future karst research has been focused on: (1) data and new technologies; (2) modeling of karst flow and reactive transport; (3) responses of karst hydrosystems to climate variability and changes across scales.

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“…Based on this assumption and employing linear flow equations, parameter estimations can be considered as relatively accurate in mature karst systems. This could also explain the results of Gallegos et al () in terms of the insensitivity with regard to mean roughness on subregional scale during base flow in a well‐developed karst aquifer (cf., Kuniansky, ). The errors of the estimated parameters will be insignificant even for high pumping rates as used during the large‐scale pumping test at the Cent Fonts catchment.…”

Section: Discussionmentioning

confidence: 99%

Turbulent and Laminar Flow in Karst Conduits Under Unsteady Flow Conditions: Interpretation of Pumping Tests by Discrete Conduit‐Continuum Modeling

Giese

Reimann

Bailly-Comte

et al. 2018

Water Resources Research

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Due to the duality in terms of (1) the groundwater flow field and (2) the discharge conditions, flow patterns of karst aquifer systems are complex. Estimated aquifer parameters may differ by several orders of magnitude from local (borehole) to regional (catchment) scale because of the large contrast in hydraulic parameters between matrix and conduit, their heterogeneity and anisotropy. One approach to deal with the scale effect problem in the estimation of hydraulic parameters of karst aquifers is the application of large‐scale experiments such as long‐term high‐abstraction conduit pumping tests, stimulating measurable groundwater drawdown in both, the karst conduit system as well as the fractured matrix. The numerical discrete conduit‐continuum modeling approach MODFLOW‐2005 Conduit Flow Process Mode 1 (CFPM1) is employed to simulate laminar and nonlaminar conduit flow, induced by large‐scale experiments, in combination with Darcian matrix flow. Effects of large‐scale experiments were simulated for idealized settings. Subsequently, diagnostic plots and analyses of different fluxes are applied to interpret differences in the simulated conduit drawdown and general flow patterns. The main focus is set on the question to which extent different conduit flow regimes will affect the drawdown in conduit and matrix depending on the hydraulic properties of the conduit system, i.e., conduit diameter and relative roughness. In this context, CFPM1 is applied to investigate the importance of considering turbulent conditions for the simulation of karst conduit flow. This work quantifies the relative error that results from assuming laminar conduit flow for the interpretation of a synthetic large‐scale pumping test in karst.

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Simulating groundwater flow in karst aquifers with distributed parameter models—Comparison of porous-equivalent media and hybrid flow approaches

Cited by 25 publications

References 14 publications

Assessment of groundwater quality and remediation in karst aquifers: A review

Assessment of groundwater quality and remediation in karst aquifers: A review

Characterization, modeling, and remediation of karst in a changing environment

Turbulent and Laminar Flow in Karst Conduits Under Unsteady Flow Conditions: Interpretation of Pumping Tests by Discrete Conduit‐Continuum Modeling

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