NDLI: Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south Florida, USA

Please wait, while we are loading the content...

Determining the condition of groundwater in evaluating the need for corrective measures: a case for the national groundwater-monitoring network in South Korea

Use of geochemical modeling to evaluate the hydraulic connection of aquifers: a case study from Chianan Plain, Taiwan

Hydrogeology and hydrochemistry of a shallow alluvial aquifer, western Saudi Arabia

The hydrochemical characteristics and evolution of groundwater and surface water in the Heihe River Basin, northwest China

Investigating pesticide transport in the León-Chinandega aquifer, Nicaragua

Erratum: Numerical simulation of groundwater flowing to horizontal seepage wells under a river

Hydrogeology Journal : Volume 15

Hydrogeology Journal : Volume 14

Hydrogeology Journal : Volume 13

Hydrogeology Journal : Volume 12

Hydrogeology Journal : Volume 11

Hydrogeology Journal : Volume 10

Hydrogeology Journal : Volume 9

Hydrogeology Journal : Volume 8

Hydrogeology Journal : Volume 7

Hydrogeology Journal : Volume 6

Hydrogeology Journal : Volume 5

Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south Florida, USA

Content Provider	Springer Nature Link
Author	DiFrenna, Vincent J. Price, René M. Savabi, M. Reza
Copyright Year	2007
Abstract	A hydrodynamic threshold between Darcian and non-Darcian flow conditions was found to occur in cubes of Key Largo Limestone from Florida, USA (one cube measuring 0.2 m on each side, the other 0.3 m) at an effective porosity of 33% and a hydraulic conductivity of 10 m/day. Below these values, flow was laminar and could be described as Darcian. Above these values, hydraulic conductivity increased greatly and flow was non-laminar. Reynolds numbers (Re) for these experiments ranged from <0.1 to 7. Non-laminar flow conditions observed in the hydraulic conductivity tests were observed at Re close to 1. Hydraulic conductivity was measured on all three axes in a permeameter designed specifically for samples of these sizes. Positive identification of vertical and horizontal axes as well as 100% recovery for each sample was achieved. Total porosity was determined by a drying and weighing method, while effective porosity was determined by a submersion method. Bulk density, total porosity and effective porosity of the Key Largo Limestone cubes averaged 1.5 g/cm$^{3}$, 40 and 30%, respectively. Two regions of anisotropy were observed, one close to the ground surface, where vertical flow dominated, and the other associated with a dense-laminar layer, below which horizontal flow dominated.Un seuil hydrodynamique entre des conditions d’écoulements darciens et non-darciens a été observée dans des blocs de calcaire de Key Largo en Floride, USA (un cube mesurant 0.2 m sur chacun de ses côtés, l’autre 0.3 m), pour une porosité effective de 33% et une conductivité hydraulique de 10 m/jour. Au dessous de ces valeurs, l’écoulement est laminaire et peut être décrit comme darcien. Au dessus de ces valeurs, la conductivité hydraulique augmente rapidement et l’écoulement est non-laminaire. Les nombres de Reynolds (Re) pour ces expériences sont compris entre <0.1 et 7. Les conditions d’écoulement non-laminaire lors des tests de conductivité hydraulique ont été observées à des Re proche de 1. La conductivité hydraulique a été mesurée selon les trois axes dans un perméamètre construit spécialement pour des échantillons de ces tailles. L’identification positive des axes verticaux et horizontaux ainsi qu’une restitution de 100 pourcent pour chaque échantillon ont été atteints. La porosité totale a été déterminée suivant une méthode d’assèchement et peusage, tandis que la porosité effective a été déterminée par une méthode de submersion. Les valeurs moyennes de la densité apparente, la porosité totale et la porosité effective des blocs de calcaire de Key Largo sont respectivement de 1.5 g/cm$^{3}$, 40 et 30%. Deux régions d’anisotropie ont été observées, une proche de la surface du sol où les écoulements verticaux dominent, et une seconde associée avec une couche laminaire dense, sous laquelle l’écoulement horizontal domine.Fue encontrado que hay un umbral hidrodinámico entre las condiciones de flujo Darciano y non-Darciano en cubos de la Caliza de Key Largo de Florida, EE.UU. (uno de los cubos midiendo 0.2 m en cada lado, los otros 0.3 m), con una porosidad eficaz de 33% y una conductividad hidráulica de 10 m/día. Por debajo de estos valores, el flujo fue laminar y podría describirse como Darciano. Por encima de estos valores, la conductividad hidráulica aumentó en gran medida y el flujo fue no-laminar. Los números de Reynolds (Re) para estos experimentos oscilaron de <0.1 a 7. Se observaron condiciones de flujo no-laminar en las pruebas de conductividad hidráulica con valores de Re cercanos de 1. La conductividad hidráulica se midió en todos los tres ejes, con un permeámetro diseñado específicamente para muestras de estos tamaños. Fue lograda la identificación positiva de los ejes verticales y horizontales así como una recuperación del 100 por ciento para cada muestra. La porosidad total se determinó por el método de secado y pesado, mientras la porosidad eficaz fue determinada por el método del sumergimiento. La densidad a granel, porosidad total y porosidad eficaz de los cubos de la Caliza de Key Largo promediaron 1.5 g/cm$^{3}$, 40 y 30%, respectivamente. Se observaron dos regiones de anisotropía, una cerca de la superficie del terreno dónde el flujo vertical dominó, y la otra asociada con una capa laminar densa, por debajo de la cual el flujo horizontal dominó.
Starting Page	31
Ending Page	42
Page Count	12
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	16
Issue Number	1
e-ISSN	14350157
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-09-13
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Karst Hydraulic properties Porosity Reynolds number USA Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Geology Hydrogeology
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south Florida, USA

Interactions of diffuse and focused allogenic recharge in an eogenetic karst aquifer (Florida, USA)

Hydrogeology Journal Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south (2008)

Multiple-pumped-well aquifer test to determine the anisotropic properties of a karst limestone aquifer in Pasco County, Florida, USA

Diagnostic hydrogeologic characteristics of a karst aquifer (Kentucky, USA)

Contrasting definitions for the term ‘karst aquifer’

Estimating hydraulic properties from tidal attenuation in the Northern Guam Lens Aquifer, territory of Guam, USA

Insights on surface-water/groundwater exchange in the upper Floridan aquifer, north-central Florida (USA), from streamflow data and numerical modeling

Relative importance and chemical effects of diffuse and focused recharge in an eogenetic karst aquifer: an example from the unconfined upper Floridan aquifer, USA

Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south Florida, USA

Similar Documents

Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south Florida, USA

Interactions of diffuse and focused allogenic recharge in an eogenetic karst aquifer (Florida, USA)

Hydrogeology Journal Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south (2008)

Multiple-pumped-well aquifer test to determine the anisotropic properties of a karst limestone aquifer in Pasco County, Florida, USA

Diagnostic hydrogeologic characteristics of a karst aquifer (Kentucky, USA)

Contrasting definitions for the term ‘karst aquifer’

Estimating hydraulic properties from tidal attenuation in the Northern Guam Lens Aquifer, territory of Guam, USA

Insights on surface-water/groundwater exchange in the upper Floridan aquifer, north-central Florida (USA), from streamflow data and numerical modeling

Relative importance and chemical effects of diffuse and focused recharge in an eogenetic karst aquifer: an example from the unconfined upper Floridan aquifer, USA

Identification of a hydrodynamic threshold in karst rocks from the Biscayne Aquifer, south Florida, USA