Inference of long-term groundwater flow transience using environmental tracers: A theoretical approach

2013 ◽  
Vol 49 (12) ◽  
pp. 8039-8052 ◽  
Author(s):  
Arash Massoudieh
Keyword(s):  
Groundwater Flow ◽  
Theoretical Approach ◽  
Environmental Tracers

Separation of groundwater-flow components in a karstified aquifer using environmental tracers

2020 ◽  
pp. 269-272
Author(s):  
R. Nativ ◽  
G. Günay ◽  
L. Tezcan ◽  
H. Hötzl ◽  
B. Reichert ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Environmental Tracers ◽  
Flow Components

scholarly journals Pollution Loads Discharged from Combined Sewer Overflows: Theoretical Approach and Long Term Numerical Assessment

1992 ◽  
Vol 23 (1) ◽  
pp. 27-48 ◽  
Author(s):  
Paolo Mignosa ◽  
Alessandro Paoletti
Keyword(s):  
Theoretical Approach ◽  
Rainfall Regime ◽  
Combined Sewer Overflows ◽  
Event Simulation ◽  
Numerical Assessment ◽  
Combined Sewer ◽  
On Line ◽  
Sewer Overflows ◽  
Two Parameters

The paper describes a theoretical analysis and a numerical assessment of pollutant loads discharged from Combined Sewer Overflows (CSOs) - with or without stormwater tanks – into the environment. The theoretical approach was based on certain simple assumptions, reasonably valid if the time scale of the problem involved is long enough (month/ year), in that single-event simulation is not interesting at all. Two main parameters related to the rainfall regime were found to be significant: the total volume of water discharged from the structure and the effective mixing factor between sanitary sewage and storm runoff. A numerical assessment of these two parameters was then made, on an annual basis, by means of a long-term rainfall series recorded in Milan, Italy. Both the “simple” CSO structure and the CSO coupled with stormwater tanks (on-line or off-line) were considered. The resulting graphs make it possible to evaluate the total annual load discharged from CSOs into the environment and the potential reduction obtained by adding a storage capacity to the overflow. This estimation could be of interest for persistent pollutants (phosphorus, heavy metals) discharged into low-recirculation bodies (lakes, estuaries, lagoons, closed seas).

The use of simulation and multiple environmental tracers to quantify groundwater flow in a shallow aquifer

1994 ◽  
Vol 30 (2) ◽  
pp. 421-433 ◽  
Author(s):  
Thomas E. Reilly ◽  
L. Niel Plummer ◽  
Patrick J. Phillips ◽  
Eurybiades Busenberg
Keyword(s):  
Groundwater Flow ◽  
Shallow Aquifer ◽  
Environmental Tracers

scholarly journals A multi-environmental tracer study to determine groundwater residence times and recharge in a structurally complex multi-aquifer system

2020 ◽  
Vol 24 (1) ◽  
pp. 249-267 ◽  
Author(s):  
Cornelia Wilske ◽  
Axel Suckow ◽  
Ulf Mallast ◽  
Christiane Meier ◽  
Silke Merchel ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Groundwater Recharge ◽  
Groundwater Age ◽  
Age Distribution ◽  
Dead Sea ◽  
Artificial Sweetener ◽  
Environmental Tracers ◽  
Jordan Valley ◽  
Aquifer System ◽  
Lumped Parameter

Abstract. Despite being the main drinking water resource for over 5 million people, the water balance of the Eastern Mountain Aquifer system on the western side of the Dead Sea is poorly understood. The regional aquifer consists of fractured and karstified limestone – aquifers of Cretaceous age, and it can be separated into a Cenomanian aquifer (upper aquifer) and Albian aquifer (lower aquifer). Both aquifers are exposed along the mountain ridge around Jerusalem, which is the main recharge area. From here, the recharged groundwater flows in a highly karstified aquifer system towards the east and discharges in springs in the lower Jordan Valley and Dead Sea region. We investigated the Eastern Mountain Aquifer system for groundwater flow, groundwater age and potential mixtures, and groundwater recharge. We combined 36Cl ∕ Cl, tritium, and the anthropogenic gases SF6, CFC-12 (chlorofluorocarbon) and CFC-11, while using CFC-113 as “dating” tracers to estimate the young water components inside the Eastern Mountain Aquifer system. By application of lumped parameter models, we verified young groundwater components from the last 10 to 30 years and an admixture of a groundwater component older than about 70 years. Concentrations of nitrate, simazine (pesticide), acesulfame K (ACE-K; artificial sweetener) and naproxen (NAP; drug) in the groundwater were further indications of infiltration during the last 30 years. The combination of multiple environmental tracers and lumped parameter modelling helped to understand the groundwater age distribution and to estimate recharge despite scarce data in this very complex hydrogeological setting. Our groundwater recharge rates support groundwater management of this politically difficult area and can be used to inform and calibrate ongoing groundwater flow models.

scholarly journals Jealousy Incarnate: Quiet Ego, Competitive Desire, and the Fictional Intelligence of Long-Term Mating in a Romantic K-Drama

2020 ◽  
Vol 10 (9) ◽  
pp. 134
Author(s):  
Lorenza Lucchi Basili ◽  
Pier Luigi Sacco
Keyword(s):  
Social Cognition ◽  
Experimental Research ◽  
Theoretical Approach ◽  
Male Partner ◽  
Quiet Ego ◽  
The One ◽  
Mating Interaction ◽  
Human Mating

In this paper, we analyze a K-drama aired by the Korean TV network SBS in 2016, Jealousy Incarnate, as a case study of the application of the Tie-Up Theory to a romantic narrative as a form of simulation of human mating processes with social cognition valence. We find that this case provides us with an example of a mating process where the choice of the male partner by the female lead character does not privilege the one that should be preferable on the basis of the standard prediction of the experimental research on human mating. This discrepancy is a signal of a basic limitation of experimental research, that highlights the subjects’ preferences for abstract potential partners but is not able to fully account for the mechanisms that lead to the choice of a specific partner in a specific mating interaction. We argue that the narrative simulation viewpoint provides insights that are complementary to those of experimental research, and that a more comprehensive theoretical approach, such as the one offered by the Tie-Up Theory, may be helpful to account for both perspectives.

Hydrodynamics of a large oil sand tailings impoundment and related environmental implications

2009 ◽  
Vol 46 (12) ◽  
pp. 1446-1460 ◽  
Author(s):  
G. P. Ferguson ◽  
D. L. Rudolph ◽  
J. F. Barker
Keyword(s):  
Groundwater Flow ◽  
Environmental Impacts ◽  
Flow Characteristics ◽  
Coarse Sand ◽  
Process Water ◽  
Oil Sand ◽  
Environmental Implications ◽  
Fine Tailings ◽  
Flow Pathways

Oil sand mine tailings are primarily contained by dykes constructed of permeable sand tailings. The environmental impacts of process waters released from these tailings facilities are controlled by groundwater flow within the impoundment structures. Transient groundwater flow characteristics were assessed within the Tar Island Dyke structure at the Suncor Inc. site near Fort McMurray, Alberta, to assist in quantifying potential long-term environmental impacts. A sequence of low-permeability fine tailings underlying the tailings water pond is supported by coarse sand tailings that are connected to and form the containment dyke structure. A clay unit separates the foundation from the underlying limestone that is hydraulically connected to the Athabasca River. The primary groundwater flow pathways are through the toe of the dyke and through the foundation. Field data and numerical simulations indicate that drainage of process water within the structure remains transient yet decreases over time. The fine tailings and pond become perched atop unsaturated coarse tailings, significantly restricting seepage and producing an environmental legacy with reclamation implications. The release of potentially contaminated process water continues to decrease, resulting in diminishing environmental risk. The lowering of pore-water pressures within the main dyke has increased its strength and long-term stability.

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