scholarly journals General opportunities and problems of point-bar to establish kilns

2018 ◽  
Vol 15 ◽  
pp. 28-38
Author(s):  
Satyabrata Karmokar ◽  
Keyword(s):  
Coming Out ◽  
Physical Feature ◽  
Point Bar ◽  
Fluvial Process ◽  
Brick Kilns ◽  
Distinctive Type ◽  
Point Bars ◽  
Set Up ◽  
Suitable Location

Point bar is a typical depositional landform of fluvial process. This physical feature is commonly found in the lower part of the Hooghly river. Point bars are very suitable location for brick kilns. There are many causes for choosing such a fragile landscape to set up this industry. Brick industry is an ancient industry in India. It is a distinctive type of enterprise of point bars and of inland vacant area as well, throughout the country. However, gradually the point-bar kilns are becoming a sick industry. The basic opportunities to set up the point-bar kilns have been highlighted in this article. Besides that, the article is also concerned about the problems coming out of the function of the point-bar kilns along with some probable remedies.

Small-scale experiments on ice-jam initiation in a curved channel

1994 ◽  
Vol 21 (5) ◽  
pp. 719-727 ◽  
Author(s):  
Gilberto E. Urroz ◽  
Robert Ettema
Keyword(s):  
Froude Number ◽  
Cross Section ◽  
Rectangular Cross Section ◽  
Small Scale ◽  
Curved Channel ◽  
Point Bar ◽  
Ice Jams ◽  
Ice Jam ◽  
Point Bars ◽  
River Bends

Two principal ice-jam initiation mechanisms, namely, lodgement and gorging, were identified through ice conveyance experiments in a small-scale, curved flume of rectangular cross section. Polyethylene blocks and beads were used to simulate ice fragments. Lodgement occurred for ice fragments that were large relative to channel width, while gorging took place when ice pieces were relatively small and were transported through the channel in multilayer. Channel roughness was found to have a significant effect in helping the arching mechanism that produces lodging. Maximum ice-floe concentration before jamming was found to increase linearly with Froude number, F, when gorging was dominant, but showed little dependence on F for ice jams initiated by lodging. Experiments conducted with point bars placed at the bends indicated that ice jams were initiated mainly by beaching of floes on the point bar. Maximum ice-floe concentration also increased linearly with Froude number for the point-bar experiments. Key words: ice-covered rivers, river bends.

Experimental and Computational Determination of LBV of Hydrogen Enriched Methane Mixtures

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Vinod Kumar Yadav ◽  
Ranjeet Singha ◽  
Abhishek Kumar Pandey ◽  
Saumya   ◽  
Ashish Kumar Singh ◽  
...  
Keyword(s):  
Coming Out ◽  
Burning Velocity ◽  
Laminar Burning Velocity ◽  
Flammability Limits ◽  
Ambient Temperatures ◽  
Gaseous Fuels ◽  
Wide Range ◽  
Hydrogen Enrichment ◽  
Institute Of Technology ◽  
Set Up

One of the major causes of environmental pollution and ozone layer depletion is the emissions coming out of the combustion devices including industrial burners, automobile vehicles and household appliances. Most of the conventional fuels used now days have high GWP and ODP. So the greatest challenges among the combustion researchers and scientists are to develop some sustainable and non conventional sources of energy that possesses capability to replace the conventional ones. One of the important gaseous fuels in non conventional category is hydrogen, which is a cleaner fuel and reduces pollution enormously. In the present work, experimental & computational analysis of laminar burning velocity (LBV) of premixed gaseous fuels (primary focus on Hydrogen enrichment) was carried out. For experimental investigation the experimental set up available in Fuel and pollution lab of Indian Institute of Technology Delhi is used. Experiments were carried out on mixtures of methane- Air and Methane-Hydrogen-Air for wide range of equivalence ratios and compared with the computational results of PREMIX with full GRI-Mech 3.0 mechanism. Most of the experiments available in literature were carried out at 298 K. In the present work it has been tried to relate the effect of low temperatures on laminar burning velocity of mixtures. The experiments have been conducted at 1 bar pressure and around 292 Kelvin with equivalence ratio ranging from 0.8 to 1.2. Methane gas is enriched with hydrogen in varying proportions and the effect of hydrogen enrichment on its laminar burning velocity studied. The objective of the addition of hydrogen to methane was to increase its laminar burning velocity as well as to extend its lean flammability limits at lower ambient temperatures.

scholarly journals Brick Sector and Air Quality: An Integrated Assessment towards 2020 Challenge of Environment Development

2021 ◽  
Vol 19 (2) ◽  
pp. 153-164
Author(s):  
Shazia Pervaiz ◽  
◽  
Muhammad Ameer Nawaz Akram ◽  
Filza Zafar Khan ◽  
Kanwal Javid ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Air Quality ◽  
Winter Season ◽  
Environmental Parameters ◽  
Control Measures ◽  
Pollution Levels ◽  
Brick Kilns ◽  
Central Regions ◽  
The Government ◽  
Set Up

Brick sector is a mainstay of the urban economy of Punjab. The traditional technology of brick making emits a lot of toxic gases and smoke particulates into air. Hence, the Government of the Punjab, Pakistan announced a ban on low technology brick kiln operations during winter season by the end of December 2020. Initially, the existing set up of brick kilns and air pollution levels were evaluated before and during lockdown period using spatial application. Further, environmental parameters such as aerosols, carbon monoxide, ozone, sulfur dioxide and carbon dioxide were determined to analyze the air quality, including metrological factors. Results of the study exhibited that the upper and central regions of Punjab are the major hubs of brick kilns. So, the level of air quality was inconsistent in the study period due to the existence of large mushrooms of brick kilns. Further, despite lockdown the highest concentration of carbon monoxide was recorded in the eastern side of the province, such as Kasur, Lahore, and Sheikhupura. The level of aerosols also fluctuated and shifted its trends in the central and southern part of the province. While SO2 and CO2 level declined and revealed a satisfactory level of air quality during shutdown. On the other hand, no significant relation to metrological factors, such as rain, is involved in the pollution reduction. Conclusively, the findings of the present study encourage the government agencies to realign the stringent control measures to improve the quality of air in the winter months using the experience of quarantine in 2020.

scholarly journals Autogenic translation and counter point bar deposition in meandering rivers

2021 ◽  
Author(s):  
Z. Sylvester ◽  
P.R. Durkin ◽  
S.M. Hubbard ◽  
D. Mohrig
Keyword(s):  
Satellite Imagery ◽  
Riparian Vegetation ◽  
Kinematic Model ◽  
Time Lapse ◽  
Sediment Deposition ◽  
Lateral Migration ◽  
Meandering Rivers ◽  
Point Bar ◽  
Point Bars ◽  
Meander Bends

Although it has long been recognized that deposition along meandering rivers is not restricted to convex banks (i.e., point bars), the consensus is that sediment deposition on concave banks of channel bends mostly occurs when meander bends translate downstream because erosion-resistant barriers inhibit their lateral migration. Using a kinematic model of channel meandering and time lapse satellite imagery from the Mamoré River in Bolivia, we show that downstream translation and associated concave bank deposition are essential, autogenic parts of the meandering process, and resulting counter point bars are expected to be present whenever perturbations such as bend cutoffs and channel reoccupations create short bends with high curvatures. The implication is that zones of concave bank deposition with lower topography, finer-grained sediment, slack water, and riparian vegetation that differs from point bars are more common than previously considered.

VISUALISATION OF A FLUVIAL CHANNEL RESERVOIR ANALOGUE FROM THE BIRKHEAD FORMATION, MERRIMELIA, MERANJI AND PELICAN FIELDS, EROMANGA BASIN

2003 ◽  
Vol 43 (1) ◽  
pp. 453 ◽  
Author(s):  
T. Nakanishi ◽  
S.C. Lang ◽  
A.B. Mitchell
Keyword(s):  
Seismic Data ◽  
Sedimentary Facies ◽  
Mean Value ◽  
3D Seismic ◽  
Point Bar ◽  
Channel Belt ◽  
Point Bars ◽  
Seismic Amplitudes ◽  
3D Seismic Data ◽  
Eromanga Basin

The effective production of hydrocarbons from the Birkhead Formation, Eromanga Basin, relies heavily on understanding the complex distribution of reservoir and seal rocks deposited in a fluvial environment. To visualise this complexity, sequence stratigraphic concepts applied to non-marine basins were combined with 3D seismic data visualisation in a study of the Birkhead interval over the Merrimelia, Meranji and Pelican fields.Fluvial channel, crevasse splay channel, floodplaincrevasse splay complex and floodplain facies were recognised from the well log motifs in the Birkhead Formation. The interval is interpreted as an alluvial transgressive systems tract bounded by flooding surfaces consisting of shaly or coaly intervals. Lateral discontinuity of the fluvial system can be demonstrated between these surfaces. Seismic amplitude distributions in the 3D seismic data in the upper part of this transgressive systems tract illustrate well developed meandering fluvial channels. Combining the spatial distributions of sedimentary facies from the well logs and the seismic amplitudes results in the interpretation of a fluvial meandering channel belt that includes point bars and abandoned channels.The point bar sandstones in the channel belt should make good reservoirs and the juxtaposition of the point bar and abandoned channel facies can result in a stratigraphic trap component to the reservoir rocks within the channel belt. Although the point bars are known to be wet in the study area, it is still useful to consider their capacity as oil reservoirs, since they may serve as analogues for similar untested point bars elsewhere. Multiple realisations of the distribution of sandstone thickness of the point bars were generated by conditional simulation, using seismic amplitudes to control extrapolation of the well data. This gave a potential reserves distribution with a mean value of 18.8 million bbl in place. The complexity of the fluvial channel systems in the Birkhead Formation described in this paper should aid understanding of the reservoir and seal distribution and help optimise production from this interval in other fields.

The impact of the absence of planning laws on the capacity of the centers of the cities

2018 ◽  
Vol 6 (1) ◽  
pp. 1-12
Author(s):  
Mufeed E. Shouk
Keyword(s):  
Coming Out ◽  
Planning Process ◽  
Decision Makers ◽  
Foreign Investments ◽  
Service Projects ◽  
Per Capita ◽  
Set Up ◽  
Investment Process ◽  
The Impact ◽  
The City

All Iraqi cities also Erbil city are particularly significant growth since 2005 and so far because of great opening that took place and an increase in rates of economic growth which was reflected in the per capita income and the development of infrastructure and public services. Because of the big shortage in all kinds of service projects, residential and entertainment. decision maker adopting the idea of ​​investing in these areas and to develop and improve the reality after coming out of economic crises caused by wars over the country in general and the events experienced by the city of Irbil, in particular, and for the work and construction, attracting foreign investments had to be set up a facilities to investment firms and investors for the success of  the process decision makers  try to find the laws of planning or change the laws planning in according  to the wishes of investors and to stimulate the investment process and thus develop and improve services and meet the requirements without referring to the main reasons that the laws has set for it.  As is well known to urban planners that the laws designed to protect the uses of the land where you are trying to stop any abuses would confuse the planning process.

The Point Bar Environment in the Mackenzie River Delta

1972 ◽  
Vol 9 (11) ◽  
pp. 1382-1393 ◽  
Author(s):  
Don Gill
Keyword(s):  
Fine Fraction ◽  
River Delta ◽  
Plant Colonization ◽  
Populus Balsamifera ◽  
Point Bar ◽  
Balsam Poplar ◽  
Sediment Sorting ◽  
Point Bars ◽  
Lower Water Content ◽  
Mackenzie River

Helicoidal flow and sediment sorting along the convex portion of shifting channels in the Mackenzie River Delta cause point bars to be composed of the coarsest material available to plant colonization. Sorting by aeolian action further reduces the fine fraction in point bar soils. Coarse-textured deposits maintain a lower water content and a higher soil temperature than other deltaic surfaces, thus nearly every point bar is colonized by a discrete plant association. This ecosystem is dominated by balsam poplar (Populus balsamifera), and the distribution of well developed poplar stands is restricted to point bars. The successional ecology of this ecosystem is discussed in relation to the point bar environment.

Come Out, Come Out, Wherever You Are

2020 ◽  
pp. 10-29
Author(s):  
Abigail C. Saguy
Keyword(s):  
World War Ii ◽  
Sexual Orientation ◽  
Mass Media ◽  
Urban Communities ◽  
Gay Men ◽  
Coming Out ◽  
World War ◽  
To Come ◽  
Set Up ◽  
Explicit Relation

This chapter traces the origin of the term coming out to gay men in pre–World War II urban communities, who spoke of coming out into gay society. It recounts how, by the 1970s, coming out had become a political tactic by which people revealed their sexual orientation to friends, neighbors, and co-workers or—in the case of celebrities—more publicly via the mass media in an effort to challenge harmful stereotypes and gain sympathy. It reviews how, in the 1980s and 1990s, coming out was set up in explicit relation to the metaphor of the closet and how the mantra “Come Out, Come Out, Wherever You Are” became a demand for members of sexual minorities to declare their sexual orientation—bringing forth the “closet case” and “outing.” It considers critiques of the imperative to come out and arguments that gay men and lesbians have moved “beyond the closet.”

scholarly journals Lateral accretion features ( epsilon cross-bedding) and point bars in the weichselian Køge Esker, East­Sjælland, Denmark

1988 ◽  
Vol 37 ◽  
pp. 11-19
Author(s):  
Jens Peter Jensen
Keyword(s):  
Point Bar ◽  
Flow Discharge ◽  
Cross Bedding ◽  
Complex Point ◽  
Point Bars

In the Køge Esker, Spanager lateral accretion features ( epsilon cross-bedding) were produced by complex point bar growth. The point bar genesis is based upon the presence of epsilon cross-bedding, the channel side attached nature of the bar (inner accretionary bank) and the paleoflow pattern. The Spanager sequence is divided into three flow discharge cycles ("megavarvic" sedimentation units).

Calibration Procedure for Magnetization Loop Tracers

2013 ◽  
Vol 543 ◽  
pp. 472-475
Author(s):  
Vasiliki Roussi ◽  
Clio G. Vossou
Keyword(s):  
Magnetic Field ◽  
Coming Out ◽  
Calibration Procedure ◽  
The Finite Element Method ◽  
Vertical Array ◽  
Steel Sheets ◽  
Excitation Coil ◽  
Set Up ◽  
Electrical Steel Sheets ◽  
The Magnetic Field

The purpose of this paper is to calibrate the magnetic field coming out of an excitation coil of certain specifications, fabricated for non-destructing testing of electrical steel sheets. Thus, a comparison between experimental and numerical analysis is discussed. For the experimental estimation of the magnetic field, a sensitive Hall sensor is used to measure the dc field at a vertical array of three selected points inside the coil. These are the lower, the middle and the upper point of the coil cross section, respectively. The magnetic field is then computed theoretically using the finite element method and the BiotSavart law. Measured results are in agreement with the calculated results of the excitation field very well, within the limits of our experimental set-up.

Sign in / Sign up

Export Citation Format

Share Document