Topics

Can Karst Conduit Models be Calibrated? A Dual Approach Using Dye Tracing and Temperature.

07:00 EST 13th February 2020 | BioPortfolio

Summary of "Can Karst Conduit Models be Calibrated? A Dual Approach Using Dye Tracing and Temperature."

Modeling flow and transport using both temperature and dye tracing provides constraints that can improve understanding of karst networks. A laminar flow and transport model using the Finite Element Subsurface Flow Model (FEFLOW) simulated the conduit connection between a sinking stream and spring in central Pennsylvania to evaluate how conduit morphology might affect dye transport. Single and overly tortuous conduit models resulted in high concentrations as dye flowed back into the conduit from the matrix after dye injections ceased. A forked conduit model diverted flow from the main conduit, reducing falling limb dye concentration. Latin Hypercube Sampling was performed to evaluate the sensitivity of 52 parameter combinations (conduit hydraulic conductivity, conduit cross-sectional area, matrix transmissivity, matrix porosity, and dispersivity) for 4 conduit geometry scenarios. Sensitivity of arrival time for 50% of the dye indicated no parameter combinations which simulate falling limb dye concentrations for tortuous geometries, confirming the importance of the forked geometry regardless of other parameters. Temperature data from high-resolution loggers were then incorporated into the forked conduit model to reproduce seasonal spring temperature using variable sink inflow. Unlike the dye trace models, the thermal models were sensitive to other model parameters, such as conduit cross-sectional area and matrix transmissivity. These results showed this dual approach (dye and temperature) to karst network modeling is useful for 1) exploring the role of conduit and matrix interaction for contaminant storage, 2) constraining karst conduit geometries, which are often poorly understood, and 3) quantifying the effect of seasonal trends on karst aquifers. This article is protected by copyright. All rights reserved.

Affiliation

Journal Details

This article was published in the following journal.

Name: Ground water
ISSN: 1745-6584
Pages:

Links

DeepDyve research library

PubMed Articles [14389 Associated PubMed Articles listed on BioPortfolio]

Quantification of nitrate fate in a karst conduit using stable isotopes and numerical modeling.

Nitrate (NO⁻) fate estimates in turbulent karst pathways are lacking due, in part, to the difficulty of accessing remote subsurface environments. To address this knowledge and methodological gap, we...

Dual genetic approaches for deciphering cell fate plasticity in vivo: more than double.

Unravelling stem cell fate plasticity is significant for understanding pathophysiology and exploring new therapeutic targets. The Cre-loxP genetic system is commonly used for cell lineage tracing. How...

The role of deep vadose zone water in tree transpiration during drought periods in karst settings - Insights from isotopic tracing and leaf water potential.

Karst environments are unusual because their dry, stony and shallow soils seem to be unfavorable to vegetation, and yet they are often covered with forests. How can trees survive in these environments...

Groundwater hydrogeochemical formation and evolution in a karst aquifer system affected by anthropogenic impacts.

Karst groundwater, an important water source, is often highly influenced by human impacts, causing environmental damage and threats to human health. However, studies on the anthropogenic influences on...

Relation Between Exercise Capacity and Extracardiac Conduit Size in Patients with Fontan Circulation.

Because Fontan circulation does not have a subpulmonary ventricle, the preload is limited. In Fontan circulation with extracardiac conduit, the size of conduit could be an important factor in determin...

Clinical Trials [4655 Associated Clinical Trials listed on BioPortfolio]

A Clinical Trial of Extraperitonealization for Prevention of Parastomal Hernia After Ileal Conduit

Many complications may occur after ileal conduit, with the incidence increasing with time after surgery. Nearly half of the complications are related to stoma and ureteroileal anastomosis....

Study to Assess Safety of the Pulmonary Valved Conduit (PV-001) in Subjects Undergoing Right Ventricular Outflow Tract Reconstruction

The study is a prospective, non-randomised, open label clinical study to assess the safety of the Bioabsorbable Pulmonary Valved (PV) conduit (PV-001) in subjects > 2 years and < 22 years ...

Mayo Clinic Conduit Report Card Questionnaires (CONDUIT)

The Mayo Clinic Conduit Report Card Questionnaires have been created in order to have a consistent evaluation tools for patients undergoing esophagectomy or esophageal reconstruction in or...

Blind Versus Fiberoptic Intubation Through I-GEL

Aim of the work To compare between use of I-gel as a conduit for blind intubation and as a conduit for fiberoptic guided intubation in children and also aim to validate the use of I-gel a...

Vascular No-React Graft Against Infection

This study seeks to demonstrate the effectiveness and safety of the Non-valved Conduit for CE marking on the basis of infection. The rationale for infection resistance with the conduit is ...

Medical and Biotech [MESH] Definitions

Identification of those persons (or animals) who have had such an association with an infected person, animal, or contaminated environment as to have had the opportunity to acquire the infection. Contact tracing is a generally accepted method for the control of sexually transmitted diseases.

Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.

Statistical models in which the value of a parameter for a given value of a factor is assumed to be equal to a + bx, where a and b are constants. The models predict a linear regression.

Statistical models of the production, distribution, and consumption of goods and services, as well as of financial considerations. For the application of statistics to the testing and quantifying of economic theories MODELS, ECONOMETRIC is available.

A set of models of how communication impacts and is impacted by subjective experience. Techniques are generated from these models by sequencing of various aspects of the models in order to change someone's internal representations. Neurolinguistic programming is concerned with the patterns or programming created by the interactions among the brain, language, and the body, that produce both effective and ineffective behavior.

Quick Search


DeepDyve research library

Searches Linking to this Article