Results 11 to 20 of about 19,120 (227)

Groundwater Transport in a Glaciomarine Aquitard: Paleosalinity and Landslide Implications. [PDF]

open access: yesGround Water
Transient 1D modeling of both [Cl] and δ18O demonstrates that advection and diffusion contribute to solute transport in porewater of glaciomarine Champlain Sea muds. Samples with the highest sensitivity (>30) for landslide hazard occur in the current leached zone.
Hinton MJ, Alpay S, Crow HL.
europepmc   +2 more sources

Subterranean movement inferred by temporary emigration in Barton Springs salamanders (Eurycea sosorum) [PDF]

open access: yesPeerJ, 2021
Movement behavior is an important aspect of animal ecology but is challenging to study in species that are unobservable for some portion of their lives, such as those inhabiting subterranean environments.
Nathan F. Bendik   +8 more
doaj   +2 more sources

Toward Reproducible Environmental Modeling for Decision Support: A Worked Example

open access: yesFrontiers in Earth Science, 2020
A fully worked example of decision-support-scale uncertainty quantification (UQ) and parameter estimation (PE) is presented. The analyses are implemented for an existing groundwater flow model of the Edwards aquifer, Texas, USA, and are completed in a ...
Jeremy T. White   +5 more
doaj   +1 more source

Karst Groundwater Vulnerability Determined by Modeled Age and Residence Time Tracers

open access: yesGeophysical Research Letters, 2023
Karst aquifers are a vital groundwater resource globally, but features such as rapid recharge and conduit flow make them highly vulnerable to land‐surface contamination.
MaryLynn Musgrove   +2 more
doaj   +1 more source

Isotopic tracers of sources of water for springs from the Edwards Aquifer, Central Texas, USA

open access: yesHydrology Research, 2021
The Edwards Aquifer (EA) in Central Texas provides water supply for over two million people and contains springs that are hydrologically and ecologically important to the region.
Lijun Tian   +7 more
doaj   +1 more source

Assessment of the development of aquifer management councils (COTAS) for sustainable groundwater management in Guanajuato, Mexico [PDF]

open access: yes, 2011
Collective groundwater management by water users—self-regulation—is increasingly advocated as a complement to state regulation. This article analyzes the attempts by the Guanajuato State Water Commission (CEAG) in central Mexico to promote user self ...
Hoogesteger van Dijk, J.D.   +2 more
core   +6 more sources

Karst and groundwater in northeastern Coahuila: An Edwards Aquifer mirror [PDF]

open access: yes, 2009
The northeastern corner of the Mexican state of Coahuila contains some of the most extensive limestone outcrops in the country, yet the karst and groundwater have seen relatively little investigation.
Sprouse, Peter
core   +1 more source

Tracer testing in the Edwards Aquifer [PDF]

open access: yes, 2019
ABSTRACT Tracer testing is established as one of the best techniques for determining groundwater velocities and identifying groundwater flow directions in karstic systems. It has been employed in the Edwards (Balcones Fault Zone) Aquifer since the mid-1980s.
Steven Johnson   +2 more
openaire   +1 more source

Natural organic matter in sedimentary basins and its relation to arsenic in anoxic ground water: the example of West Bengal and its worldwide implications [PDF]

open access: yes, 2004
In order to investigate the mechanism of As release to anoxic ground water in alluvial aquifers, the authors sampled ground waters from 3 piezometer nests, 79 shallow (80 m) wells, in an area 750 m by 450 m, just north of Barasat, near Kolkata (Calcutta),
Banerjee, DM   +12 more
core   +1 more source

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