Mathematical investigation of diffusion and decomposition of pollutants as a basic issue in water stream pollution

2020 ◽  
Vol 13 (18) ◽  
Author(s):  
Farshad Farahbod
Keyword(s):  
Water Stream ◽  
Stream Pollution ◽  
Mathematical Investigation ◽  
Basic Issue

scholarly journals Uncertainty of model parameters in stream pollution using fuzzy arithmetic

2008 ◽  
Vol 10 (3) ◽  
pp. 189-200 ◽  
Author(s):  
H. Mpimpas ◽  
P. Anagnostopoulos ◽  
J. Ganoulis
Keyword(s):  
Dispersion Equation ◽  
Fuzzy Numbers ◽  
Quality Parameters ◽  
Quality Parameter ◽  
Fuzzy Arithmetic ◽  
Model Parameters ◽  
Water Stream ◽  
Stream Pollution ◽  
Advection Dispersion ◽  
The One

Fuzzy arithmetic is employed for the analysis of uncertainties in water-stream pollution, when the various model parameters involved are imprecise. The one-dimensional advection–dispersion equation, for both a conservative and a non-conservative substance, was solved analytically for point and Gaussian-hill input loads of pollution, considering the dispersion and decay coefficients involved as fuzzy numbers. The solution of the advection–dispersion equation was also conducted numerically for the same input loads with the finite-difference method, employing a Lagrangian–Eulerian scheme. The good agreement between analytical and numerical results presented in the form of fuzzy numbers confirms the reliability of the numerical scheme. The advection–dispersion equation of a non-conservative substance was then solved numerically for ten different water quality parameters, in order to study the water pollution in a water stream. The dispersion coefficient, the source terms and the input loads were expressed as fuzzy numbers, and the concentration of each quality parameter was obtained in fuzzy-number form. With fuzzy modeling, imprecise data can be represented and imprecise output produced, with minimal input data requirements and without the need of a large number of computations.

Pendidikan Islam dan Humanitas

2018 ◽  
Vol 10 (2) ◽  
pp. 341-355
Author(s):  
Mohammad Liwa Irrubai
Keyword(s):  
Social Change ◽  
Liberal Education ◽  
Social Life ◽  
Current Issue ◽  
Alternative Solution ◽  
Educational Objectives ◽  
Basic Issue ◽  
New Ideas ◽  
Education Today ◽  
Human Problem

Today, the human problem in social life concerning education is growing more complex; many new ideas emerge as the level of human intellectuality grows. This paper will reveal the current issue of education in Indonesia and discuss ideas from the concept of liberal education. The basic issue of education criticized by liberal education is that education today focuses more on the needs of society than the educational objectives themselves. Education as a tool to transfer science, values, and agents of social change is seen as one alternative solution in the framework of improving people's lives. The education in which values are embodied is one of the efforts offered by genuine liberal education, aimed at giving us the habits, ideas and techniques necessary to continue our own education. Humans have the ability to learn continuously throughout life so that we can prepare ourselves to study and again as long as we are alive.

RECONSIDERING THE WAQF: Traditional Mechanism of Urban Regeneration in Historic Muslim Cities

2015 ◽  
Vol 9 (1) ◽  
pp. 18
Author(s):  
Haysam Nour
Keyword(s):  
Local Community ◽  
Common Factors ◽  
Urban Regeneration ◽  
It Use ◽  
Community Awareness ◽  
Cultural Aspect ◽  
Basic Issue ◽  
Key Issues

Through the last century, historic Muslim Cities witnessed significant decay. The level of decay, while a number of those cities were inscribed in the WHL, created an international urge to intervene. With very limited exceptions, modern interventions did not create an obvious impact due to common factors: inefficient management, fragmented responsibilities on administrative levels, weak legislations, and lack of community awareness, participation, and absence of integrated mechanisms. However, those factors are mostly of operational nature. This paper sheds light on a socio-cultural aspect of deterioration through inquiring about a basic issue: “How was the historic Muslim city maintained for centuries?”The key answer refers always to “the Waqf”. Although its nature and role are quite different now, the Waqf institution was the main player in urban regeneration in Muslim cities until early 1900. How did it use to work? Within which value reference? In addition, what was the position of the local community in the process? Those are the key issues discussed in the paper arguing that reconsidering this traditional mechanism might add another layer to the understanding of the complexity of Muslim cities and accordingly, might lead to different approaches in future interventions.

Modeling and Assessment of the Produced Water Discharges from Offshore Petroleum Platforms

2007 ◽  
Vol 42 (4) ◽  
pp. 303-310 ◽  
Author(s):  
Zhi Chen ◽  
Lin Zhao ◽  
Kenneth Lee ◽  
Charles Hannath
Keyword(s):  
Random Walk ◽  
Produced Water ◽  
Model Development ◽  
Three Dimensional ◽  
Monitoring Program ◽  
Ecological Monitoring ◽  
Numerical Approach ◽  
Ocean Model ◽  
Scale Model ◽  
Water Stream

Abstract There has been a growing interest in assessing the risks to the marine environment from produced water discharges. This study describes the development of a numerical approach, POM-RW, based on an integration of the Princeton Ocean Model (POM) and a Random Walk (RW) simulation of pollutant transport. Specifically, the POM is employed to simulate local ocean currents. It provides three-dimensional hydrodynamic input to a Random Walk model focused on the dispersion of toxic components within the produced water stream on a regional spatial scale. Model development and field validation of the predicted current field and pollutant concentrations were conducted in conjunction with a water quality and ecological monitoring program for an offshore facility located on the Grand Banks of Canada. Results indicate that the POM-RW approach is useful to address environmental risks associated with the produced water discharges.

Remote turbidity measurement with a laser reflectometer

1998 ◽  
Vol 37 (12) ◽  
pp. 255-261 ◽  
Author(s):  
Mark Johnson
Keyword(s):  
Water Surface ◽  
Free Water ◽  
Optical Scattering ◽  
Flowing Water ◽  
Water Stream ◽  
Water Turbidity ◽  
Water Colour ◽  
Contact Measurement ◽  
Optical Instruments ◽  
Better Than

A simple, laser-based reflectometer is described for the measurement of water turbidity via 180° optical scattering. Applications exist both in clean source waters (0-1000NTU) with a minimum detectable turbidity better than 1NTU, and in dense wastewater primary-clarifier sludges. The non-contact measurement is performed from a distance at least up to 10m, substantially avoiding the usual window fouling problems of optical instruments. By measuring directly in the process, through a free water surface or on the side of a flowing water stream, the difficulties of transporting sample to the instrument are also avoided. Extensions to be described allow measurement also of water colour.

scholarly journals CFD Investigation of Trout-Like Configuration Holding Station near an Obstruction

Fluids ◽  
2021 ◽  
Vol 6 (6) ◽  
pp. 204
Author(s):  
Kamran Fouladi ◽  
David J. Coughlin
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Laboratory Experiment ◽  
Numerical Models ◽  
Interaction Model ◽  
Underwater Vehicle ◽  
Water Stream ◽  
Hydrodynamic Analysis ◽  
Structure Interaction ◽  
Vehicle Systems

This report presents the development of a fluid-structure interaction model using commercial Computational fluid dynamics software and in-house developed User Defined Function to simulate the motion of a trout Department of Mechanical Engineering, Widener University holding station in a moving water stream. The oscillation model used in this study is based on the observations of trout swimming in a respirometry tank in a laboratory experiment. The numerical simulations showed results that are consistent with laboratory observations of a trout holding station in the tank without obstruction and trout entrained to the side of the cylindrical obstruction. This paper will be helpful in the development of numerical models for the hydrodynamic analysis of bioinspired unmanned underwater vehicle systems.

Suffering Happiness

2012 ◽  
Vol 1 (2) ◽  
pp. 209-229 ◽  
Author(s):  
Arthur P. Bochner
Keyword(s):  
Good Life ◽  
Moral Judgments ◽  
The Other ◽  
The Core ◽  
Basic Issue ◽  
Material Conditions

The author develops a dialectical conception of happiness—a suffering happiness—that can clarify autoethnography's existential convictions and ethical commitments. Autoethnography should produce an ethical connection to the other's suffering, a desire to transform the material conditions of the other's heartbreaking circumstances, increasing the possibility of happiness and a good life. The question of how we can make life better is the basic issue at the core of autoethnography. Rather than accepting a decontextualized and affective conception of happiness, we need to understand happiness as inextricably tied to narrative and moral judgments about the goodness of a whole life. The narratives we make in autoethnography ought to invite and encourage a responsiveness to the other and a responsibility for the other.

Water quality assessment and apportionment source of pollution from neighbouring rivers in the Tapeng Lagoon (Taiwan) using multivariate analysis: a case study

2006 ◽  
Vol 54 (11-12) ◽  
pp. 47-55 ◽  
Author(s):  
S.-W. Liao ◽  
J.-Y. Sheu ◽  
J.-J. Chen ◽  
C.-G. Lee
Keyword(s):  
Water Quality ◽  
Water Resource Management ◽  
Pollution Prevention ◽  
Water Quality Assessment ◽  
Stream Pollution ◽  
Effect Factor ◽  
Habitat Recovery ◽  
Quality Of Water ◽  
Source Of Pollution

Factor analysis was conducted to explain the characteristics and variation in the quality of water during the disassembly of oyster frames and fishery boxes. The result shows that the most important latent factors in the Tapeng Lagoon are the ocean factor, the primary productivity factor, and the fishery pollution factor. Canonical discriminant analysis is applied to identify the source of pollution in neighbouring rivers outside the Tapeng Lagoon. The two constructed discriminant functions (CDFs) showed a marked contribution to all the discriminant variables, and that total nitrogen, algae, dissolved oxygen, and total phosphate combined in the nutrient effect factor. The recognition capacities in these two CDFs were 95.6% and 4.4%, respectively. The water quality in the Kaoping river most strongly affected the water quality in the Tapeng Lagoon. Disassembling the oyster frames and fishery boxes improved the water quality markedly. However, environmental topographic conditions indicate that strengthening stream pollution prevention and constructing another entrance to the ocean are the best approaches for improving the quality of water in the Tapeng Lagoon by reducing eutrophication. These approaches and results yield useful information concerning habitat recovery and water resource management.

Karl Barth on Religion: A Study for Christians in Mission

1978 ◽  
Vol 6 (4) ◽  
pp. 441-461
Author(s):  
Carl F. Starkloff
Keyword(s):  
Cultural Sensitivity ◽  
Driving Force ◽  
Religious Life ◽  
Karl Barth ◽  
Spiritual Life ◽  
Careful Study ◽  
Theory Of Religion ◽  
Basic Issue ◽  
In Christ ◽  
Positive Input

Many feel Karl Barth has had his day, Father Starkloff disagrees. He feels a careful study of Barth's theory of religion, within the context of the search for “cultural sensitivity,” can be very rewarding. For it is Barth who reminds us that the central driving force of man's religious life is self-affirmation and self-insurance. Although a solid grasp of the phenomenology of religion is “essential to the training of all missionaries in order to overcome ‘adversaries' and for its positive input into the spiritual life,” the basic issue remains unchanged — the essence of God's unique and once-for-all disclosure and giving of himself to man in Christ.

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