Estimating Preferential Flow in Karstic Aquifers Using Statistical Mixed Models

  title={Estimating Preferential Flow in Karstic Aquifers Using Statistical Mixed Models},
  author={Angel A. Anaya and Ingrid Y. Padilla and Ra{\'u}l E Macchiavelli and Dorothy J. Vesper and John D. Meeker and Akram N. Alshawabkeh},
Karst aquifers are highly productive groundwater systems often associated with conduit flow. These systems can be highly vulnerable to contamination, resulting in a high potential for contaminant exposure to humans and ecosystems. This work develops statistical models to spatially characterize flow and transport patterns in karstified limestone and determines the effect of aquifer flow rates on these patterns. A laboratory‐scale Geo‐HydroBed model is used to simulate flow and transport… 
Equivalent Porous Media (EPM) Simulation of Groundwater Hydraulics and Contaminant Transport in Karst Aquifers
The results from the present study suggest that the EPM approach is capable to reproduce the spreading of a TCE plume at intermediate scales with sufficient accuracy for groundwater resources management and the planning of contamination mitigation strategies.
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Characteristics of preferential flow paths and their effects on soil properties
Soil organic matter content, saturated hydraulic conductivity and soil metal content in the preferential flow paths were different from those in the soil matrix, and the influence of preferential flow on soil properties and soilMetal content was determined.
Isotopes and geochemistry to assess shallow/thermal groundwater interaction in a karst/fissured-porous environment (Portugal): a review and reinterpretation
As a distinctive fingerprint of the groundwater sources and water–rock interaction within a karst/fissured-porous environment, isotopic (e.g. δ13C, δ18O, δ34S, 3H, and 14C) and geochemical data have
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Preferential flow is important for solute transport in soil. This study aims to investigate distribution characteristics of preferential flow paths in agricultural land and to determine the effects
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It is well known that the same characteristics that make karst groundwater systems highly productive make them very vulnerable to contamination. Once in the subsurface, many contaminants move along
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Karst aquifers account for up to 20% of the world land area and are a source of drinking water for much of the world. Despite the critical value of these aquifers as a drinking water source, there
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It is shown that karst aquifers are highly vulnerable to contamination and can serve as a long-term route of contaminants to potential points of exposure.


Ground-water flow and solute-transport simulation modeling are major components of most exposure and risk assessments of contaminated aquifers. Model simulations provide information on the spatial
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Quantitative ground-water tracing of conduit-dominated karst aquifers allows for reliable and practical interpretation of karst ground-water flow. Insights into the hydraulic geometry of the karst
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The Biscayne aquifer is a highly transmissive karst limestone that serves as the sole source of drinking water to over two million residents in south Florida. The aquifer is characterized by
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The application of a process-based flow and transport model demonstrates that variations of physicochemical parameters depend to a large extent on the intensity and duration of recharge events and provide information about the structure and geometry of the conduit system as well as about the interaction between conduits and fissured porous rock.
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Travel time distributions of water or tracers in conduit-type karst aquifers can be found from linear systems analysis of either tracer test data or naturally occurring fluctuations in springflow
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Conceptual models are needed to assist regulators and site managers in characterizing chlorinated-solvent contamination in karst settings and evaluating clean-up alternatives. Five preliminary