scholarly journals Numerical Modeling of Coupled Groundwater and Surface Water Interactions in an Urban Setting

2007 ◽  
Author(s):  
J Rihani ◽  
R Maxwell
Keyword(s):  
Numerical Modeling ◽  
Surface Water ◽  
Urban Setting

Assessing interactions between groundwater and surface water in a Pampean stream

2016 ◽  
Vol 48 (4) ◽  
pp. 1045-1057 ◽  
Author(s):  
F. Becher Quinodoz ◽  
M. Blarasin ◽  
H. Panarello ◽  
E. Ducos
Keyword(s):  
Numerical Modeling ◽  
Surface Water ◽  
Sodium Bicarbonate ◽  
Stream Flow ◽  
Stream Water ◽  
Salt Water ◽  
Unconfined Aquifer ◽  
Surface Water And Groundwater ◽  
Groundwater Samples ◽  
Groundwater Supply

In the south of Córdoba (Argentina), groundwater from the unconfined aquifer, presents scarce suitability due to high values of salts, sulfates, arsenic and fluorides. This situation makes it necessary to explore other possibilities, for example, conjunctive use of groundwater and surface water. The objective of this work was to describe the dynamic and geochemical relationships between surface water and groundwater in the medium-low basin of the Ají stream. The conceptual model was supported by the use of stable 18O/16O and 2H/1H isotopes and it was validated through numerical modeling and 222Rn activity results. The stream water is sodium bicarbonate fresh type (460–1,400 μS/cm). The aquifer presents fresh to salt water (720–14,000 μS/cm), from sodium bicarbonate to sodium chloride type. The isotopic results show that there is a straight mixing line between surface water and groundwater samples. The geochemical numerical modeling revealed that in the mixing models between stream and aquifer, for hydraulically linked samples, the aquifer only provides 2% of the total stream flow. This was validated through 222Rn results, which led us to the estimation of about 2% of groundwater supply in summer.

Wind-Induced Air-Flow Patterns in an Urban Setting: Observations and Numerical Modeling

2018 ◽  
Vol 175 (8) ◽  
pp. 3051-3068 ◽  
Author(s):  
Ahmed M. A. Sattar ◽  
Mohamed Elhakeem ◽  
Bishoy N. Gerges ◽  
Bahram Gharabaghi ◽  
Ismail Gultepe
Keyword(s):  
Numerical Modeling ◽  
Air Flow ◽  
Flow Patterns ◽  
Urban Setting

scholarly journals The presence of SARS-CoV-2 RNA in different freshwaters of urban settings determined by RT-qPCR: implications for water safety

2021 ◽  
Author(s):  
Jurgen Mahlknecht ◽  
Diego Alonso-Padilla ◽  
Edrick Ramos ◽  
Luisa Ma. Reyes ◽  
Mario Moises Alvarez
Keyword(s):  
Surface Water ◽  
Dilution Effect ◽  
Water Disinfection ◽  
Urban Setting ◽  
Water Safety ◽  
Or Efficiency ◽  
Viral Loads ◽  
Virus Rna ◽  
Groundwater Samples ◽  
Wastewater Samples

This is the first study focused on the presence of SARS-CoV-2 in different freshwater environments of an urban setting. Groundwater and surface water reservoirs for drinking water as well as water from receiving rivers of Monterrey Metropolitan Area were sampled repeatedly during a peak phase between October 2020 and January 2021, and the virus RNA was measured by quantitative reverse transcription polymerase chain reaction. Forty-four percent of groundwater samples demonstrated detectable virus loads between 2.9 and 5.6 copies/ml. A significant correlation with sucralose concentration in groundwater reaffirmed the hypothesis of leaching and infiltration of effluents from surface and/or failing sewage pipes, and emphases the importance of water disinfection. Thirteen percent of surface water dam samples tested positive, with values varying between 3.3 and 3.8 copies/ml. Finally, 21% of river samples marked positive for viral RNA, with concentrations ranging from 0.3 to 7.0 copies/ml. Raw wastewater samples taken in the same period show viral loads of up to 3535 copies/ml, demonstrating a dilution effect and/or efficiency of wastewater facilities. Variations of viral loads over time and at sub-metropolitan level in groundwater and surface water in general reflects the reported variation of infections for Monterrey.

scholarly journals SUBGRID NUMERICAL MODELING OF TSUNAMI AND STORM SURGE INUNDATION IN A COASTAL URBAN SETTING

2020 ◽  
pp. 11
Author(s):  
Zhongduo Zhang ◽  
Nobuki Fukui ◽  
Yu Chida ◽  
Andrew Kennedy ◽  
Nobuhito Mori ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Storm Surge ◽  
Numerical Models ◽  
Shallow Water Equation ◽  
Physical Experiment ◽  
Urban Setting ◽  
Hazard Maps ◽  
Coastal City ◽  
The City ◽  
Shielding Effects

An experiment using a physical model of a coastal city was conducted to simulate tsunami and storm surge conditions which may lead to city inundation. The results of the physical experiment were compared with those from a subgrid numerical model based on the shallow water equation using the topography of the physical experiment obtained from LIDAR scanning. The experiment aims to provide a better understanding on the variation of tsunami or storm surge inundation level at different locations of the city due to the ground elevation, building arrangement, and shielding effects. The result from this experiment will serve to increase the accuracy of coastal numerical models and revise the current hazard maps and evacuation plans.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/k4v5EotRpfg

scholarly journals Modeling of Spacio-temporal Evolution of Salt Dispersion on Nokoue Lake

2021 ◽  
Vol 384 ◽  
pp. 93-98
Author(s):  
Esdras Babadjidé Josué Zandagba ◽  
Eric Adéchina Alamou ◽  
Ezechiel Obada ◽  
Amédée Chabi ◽  
Eliézer Iboukoun Biao ◽  
...  
Keyword(s):  
Water Quality ◽  
Numerical Modeling ◽  
Surface Water ◽  
Temporal Evolution ◽  
Water Quality Management ◽  
Surface Water Modeling ◽  
Pollutants Transport ◽  
Flood Period ◽  
Spatio Temporal ◽  
Freshwater Inflows

Abstract. The numerical modeling of spatio-temporal evolution of lagoon has an important role in predicting the behaviour of these systems. Knowing the concentration of the pollutant field distribution in time and space contributes significantly to the prediction of exceptional phenomena. The purpose of this paper is to simulate the transport and dispersion of salt at Nokoue Lake. To this end, the 2D hydrodynamic model SMS (Surface Water Modeling System) has been used. Results showed that in flood period the freshwater inflows produce a net seaward transport, while in low water period the tides lead to periodic seaward and landward transport. The developed numerical model is useful for predicting pollutants transport in this system, for water quality management of the Nokoue Lake, and therefore, fight against eutrophication.

scholarly journals Dynamics, Origin, and Activation of Main Belt Comets

2009 ◽  
Vol 5 (S263) ◽  
pp. 207-214 ◽  
Author(s):  
Nader Haghighipour
Keyword(s):  
Numerical Modeling ◽  
Surface Water ◽  
Outer Part ◽  
Asteroid Belt ◽  
Activation Mechanism ◽  
Main Belt ◽  
Water Ice ◽  
Numerical Studies ◽  
Cometary Activity

AbstractThe discovery of Main Belt Comets (MBCs) has raised many questions regarding the origin and activation mechanism of these objects. Results of a study of the dynamics of these bodies suggest that MBCs were formed in-situ as the remnants of the break-up of large icy asteroids. Simulations show that similar to the asteroids in the main belt, MBCs with orbital eccentricities smaller than 0.2 and inclinations lower than 25° have stable orbits implying that many MBCs with initially larger eccentricities and inclinations might have been scattered to other regions of the asteroid belt. Among scattered MBCs, approximately 20% reach the region of terrestrial planets where they might have contributed to the accumulation of water on Earth. Simulations also show that collisions among MBCs and small objects could have played an important role in triggering the cometary activity of these bodies. Such collisions might have exposed sub-surface water ice which sublimated and created thin atmospheres and tails around MBCs. This paper discusses the results of numerical studies of the dynamics of MBCs and their implications for the origin of these objects. The results of a large numerical modeling of the collisions of m-sized bodies with km-sized asteroids in the outer part of the asteroid belt are also presented and the viability of the collision-triggering activation scenario is discussed.

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