Peculiarities of performance of experimental filtering works in sites subsoil operated by single water intakes

2021 ◽  
pp. 46-56
Author(s):  
V. I. Kozirev ◽  
V. A. Beshentsev
Keyword(s):  
Field Research ◽  
Water Withdrawal ◽  
Short Term ◽  
Water Conductivity ◽  
Fresh Groundwater ◽  
Water Abundance ◽  
Small Water ◽  
Water Wells ◽  
Groundwater Reserves ◽  
Filtration Properties

The article discusses the methods used in the field experimental filtration work, which allow you to gain knowledge about the filtration properties and water abundance of rocks. The features of the experimental filtration work in the subsoil areas operated by single water intakes are shown. It is noted that these are small water bodies, both in terms of the number of water wells and the amount of actual water withdrawal. The article proposes to use short-term single pumpings as a field research method in the above-mentioned areas, according to the results of which it is possible to substantiate the amount of required water withdrawal and determine the calculated values of the water conductivity coefficient. As an example, the results of pumping are considered, obtained during the implementation of experimental filtration work at three single water intakes located within the Latitude Ob region. The results of the experimental filtration work served as the source material for calculating the reserves of fresh groundwater. Fresh groundwater reserves were calculated and approved for each site in the amount of 499 m3/day for category B.

Study of the "aquifer-well" geotechnogenic system using precision observations at the water intakes of Tyumen region

2020 ◽  
pp. 8-20
Author(s):  
A. R. Kurchikov ◽  
V. I. Kozyrev
Keyword(s):  
Water Level ◽  
Raw Materials ◽  
Underground Water ◽  
Water Bodies ◽  
Fresh Groundwater ◽  
Good Convergence ◽  
Small Water ◽  
Groundwater Reserves ◽  
Water Level Measurements ◽  
Filtration Medium

An express research method is presented for studying the geotechnogenic system "aquifer-well" in solving problems of hydrogeology. The express method is based on the use of precision water level measurements. The scope of its application and relevance in modern conditions аre shown. Express pumping was performed at water bodies of Tyumen region, where an assessment (revaluation) of fresh underground water reserves was carried out. A comparative analysis of the results of express and traditional methods showed good convergence. The use of express pumping in the practice of hydrogeological research on small water bodies is the only tool for obtaining raw materials for the calculation (recalculation) of fresh groundwater reserves and makes it possible to reduce material costs when performing pilot filtration work. The recording of changes in the values of the conductivity coefficient by means of precision measurements of the water level during express pumping in monitoring studies allows you reliable and timely detection of changes in the filtration medium.

scholarly journals Kecerdasan Emosi Dan Depresi Pada Mahasiswa Yang Sudah Menikah

2019 ◽  
Vol 6 (2) ◽  
pp. 146
Author(s):  
Azizah Fitriah
Keyword(s):  
Emotional Intelligence ◽  
Hypothesis Test ◽  
Negative Relationship ◽  
Field Research ◽  
Short Term ◽  
Significant Negative Relationship ◽  
Correlational Approach ◽  
The Individual ◽  
Married Students ◽  
The Relationship

Every human being will one day experience a tense period in the short term when facing known problems such as career pressures, family disputes or quarrels, material pressures, and personal despair, and we will think that this is depression, which is not is an important problem because it will resolve itself, but none of these fleeting conditions is depression. Good emotional intelligence can reduce aggression, especially in adolescents. Therefore, if emotions are managed successfully, the individual will be able to entertain themselves when overwritten by sadness, can release anxiety, moodiness or offense and rise quickly again from it all. This research is field research with a correlational approach, exploring the relationship between depression and emotional intelligence in married students. The results of the hypothesis test show that between emotional intelligence and depression in married students has a significant negative relationship (XY = -0.411; sig = 0.014 <0.05). This is in accordance with the data obtained from the SPSS 19 for Windows program, stating that r table 0.334 and r xy (r hit) -0.411, said to be significant if r xy = 0.411> r table = 0.334. In other words, the higher the emotional intelligence of students who are married, the lower the possibility of depression.

Eruption Scenarios of Active Volcanoes in Indonesia

2019 ◽  
Vol 14 (1) ◽  
pp. 40-50
Author(s):  
Setsuya Nakada ◽  
Fukashi Maeno ◽  
Mitsuhiro Yoshimoto ◽  
Natsumi Hokanishi ◽  
Taketo Shimano ◽  
...  
Keyword(s):  
Time Windows ◽  
Field Research ◽  
Monitoring Data ◽  
Event Tree ◽  
Geochemical Monitoring ◽  
Short Term ◽  
Discharge Rates ◽  
Magma Discharge ◽  
Event Trees ◽  
Active Volcanoes

Eruption scenarios were prepared as possible sequences in event trees for six active volcanoes in Indonesia, that are located near populated areas or have erupted in recent years (Galunggung, Guntur, Kelud, Merapi, Semeru, and Sinabung). The event trees prepared here show sequences of possible eruption phenomena without probabilities on branches and cover sequences experienced in historical and pre-historical eruptions based on archives and field research results. Changing magma discharge rates during eruption sequences were considered for the event tree of Merapi. This conceptual event tree can also be used as a short-term event tree in which forecasting the coming eruption became possible with geophysical and geochemical monitoring data. Eruption event trees prepared for selected time windows cannot illustrate all plausible hazards and risks associated with an eruption. Therefore, hazards and risks generated from an eruption should be considered in different domains from the event tree.

scholarly journals Problems of Bacteriological Pollution in Water Wells in Wadi Hadramout Water Project

2001 ◽  
Vol 6 (2) ◽  
pp. 85
Author(s):  
Salem M. Bin Qadhi ◽  
Saeed Y. Bashir ◽  
Taha O. Assaggaf
Keyword(s):  
Water Pollution ◽  
Drinking Water ◽  
Future Generations ◽  
Short Term ◽  
Water Project ◽  
Water Wells ◽  
Small Project ◽  
Quality Water

This paper presents an existing problem of drinking water pollution for a small project and one of the model projects of drinking water in Yemen, designed to save and preserve good quality water for the present and future generations in the area. The paper gives the details of the project and explains the problem of bacteriological pollution and the steps undertaken to solve the problem. Some of the results for short-term solutions and recommendation for the long-term solutions are also given. 

scholarly journals Problems of Drinking and Domestic Water Supply in Mountainous Areas of the Chechen Republic

2019 ◽  
Author(s):  
S S Zaurbekov ◽  
A A Shaipov ◽  
L I Ozdoyeva ◽  
R Z Janargaliev ◽  
A M Movlayeva ◽  
...  
Keyword(s):  
Water Supply ◽  
Underground Water ◽  
Mountainous Areas ◽  
Domestic Water ◽  
Fresh Groundwater ◽  
Alluvial Deposits ◽  
Quality Water ◽  
Groundwater Reserves ◽  
River Valleys ◽  
Domestic Water Supply

The article presents the results of assessment works on drinking groundwater of alluvial sediments of the river valleys, perspective for water supply of mountainous regional centers of the Chechen Republic (Itum-Kale, Khimoi, Shatoi and Vedeno villages). The problem of providing quality water to more than 65,000 people living in four regions of the Chechen Republic mountainous areas is becoming more and more critical every year. According to the technical (geological) task, water demand for drinking and domestic water supply of the population is 4.0 thousand m3/day. The assessment of groundwater reserves for domestic and drinking purposes directly in the areas of the above-mentioned settlements was not made earlier, except for Itum-Kalinskoye, where in 2012–2013 HIDEK CJSC performed prospecting and assessment of the underground water reserves in the area of the projected riverbed water intake for the needs of the ”All-season ski resort Veduchi”. Based on the results of these works, the Khacharoiakhk field of fresh groundwater was explored in the alluvial deposits of the Khacharoiakhk River valley, which belong to the upper quaternary and modern quaternary system.

scholarly journals Offshore fresh groundwater in coastal unconsolidated sediment systems as a potential fresh water source in the 21st century

2021 ◽  
Author(s):  
Daniel Zamrsky ◽  
Gualbert Oude Essink ◽  
Edwin Sutanudjaja ◽  
Rens van Beek ◽  
Marc F P Bierkens
Keyword(s):  
Fresh Water ◽  
Coastal Aquifers ◽  
Groundwater Resources ◽  
Water Source ◽  
Groundwater Exploration ◽  
Coastal Areas ◽  
Fresh Groundwater ◽  
Sea Levels ◽  
Long Run ◽  
Groundwater Reserves

Abstract Coastal areas worldwide are often densely populated and host regional agricultural and industrial hubs. Strict water quality requirements for agricultural, industrial and domestic use are often not satisfied by surface waters in coastal areas and consequently lead to over-exploitation of local fresh groundwater resources. Additional pressure by both climate change and population growth further intensifies the upcoming water stress and raise the urgency to search for new fresh water sources. In recent years, offshore fresh groundwater reserves have been identified as such a potential water source. In this study, we quantify, for the first time, the global volume of offshore fresh groundwater in unconsolidated coastal aquifers and show that it is a viable option as additional fresh water source in coastal areas. Our results confirm previously reported widespread presence of offshore fresh groundwater along the global coastline. Furthermore, we find that these reserves are likely non-renewable as they were deposited during glacial periods when sea levels were substantially lower compared to current sea level. We estimate the total offshore fresh groundwater volume in unconsolidated coastal aquifers to be approximately 1.06 ± 0.2 million km³, which is roughly three times more than estimated previously and about 10% of all terrestrial fresh groundwater. With extensive active and inactive offshore oil pumping present in areas of large offshore fresh groundwater reserves, they could be considered for temporary fresh groundwater exploration as part of a transition to sustainable water use in coastal areas on the long run.

STUDYING THE EFFECT OF THE SCHEME OF EXPOSURE TO MICROWAVE ELECTROMAGNETIC FIELDS ON THE HARDNESS OF THE CURED CARBON FIBER-REINFORCED PLASTIC WITH LIGHTNING-PROTECTION GRID APPLIED ON ITS SURFACE

2020 ◽  
Vol 0 (4) ◽  
pp. 12-18
Author(s):  
I.V. ZLOBINA ◽  
Keyword(s):  
Electromagnetic Field ◽  
Carbon Fiber ◽  
Wind Turbines ◽  
Field Research ◽  
Carbon Plastic ◽  
Lightning Protection ◽  
Fiber Reinforced ◽  
Short Term ◽  
Short Term Exposure ◽  
Carbon Fiber Reinforced

Currently, the use of fiber-reinforced polymer composite materials (PCM), in particular, carbon plastic and fiberglass, is much promising in manufacturing structural elements of aircrafts and wind turbines. In order to increase the resistance of these materials to static electricity and lightning strikes when passing storm fronts, the structure of the PCM includes various lightning protection coatings (LPC). The most common LPC are in the form of copper grids. The fin assembly and planes of aircrafts and also large-sized blades of wind turbines are exposed to cyclic high-amplitude and low-frequency bending loads as well as vibrations. Collisions with solid objects are quite possible. Thus, hardness is one of the key characteristics of PCM that determines their performance properties. Strength and endurance of PCM components can be increased by short-term exposure to a microwave electromagnetic field. The presence of a built-in metallic structure brings additional uncertainty in the tolerance to operating loads by anisotropic PCM, as well as in the process of their interaction with an ultrahigh frequency electromagnetic field. Research was performed on the hardness of carbon fiber-reinforced plastics with built-in LPC using various exposure schemes to a microwave electromagnetic field: from the side of the LPC, from the side opposite to the LPC and sequential processing from both sides. It was found that short-term processing in a microwave electromagnetic field with energy flux density of (17-18)×104mW/cm2 did not lead to any change in the initial hardness of the surface of the samples. However, the uniformity of hardness distribution on the surface of the samples in- creased by 35.8-70%, thus ensuring a more adequate tolerance to loads of different nature. The obtained results can be used in the development of finishing technologies to post-process PCM components and improve the latter’s stability to dynamic loading.

scholarly journals Exploring private water wells for fecal sources and evidence of pathogen presence in the context of current testing practices for potability in Ontario

2019 ◽  
Vol 55 (1) ◽  
pp. 93-105 ◽  
Author(s):  
Sophie Felleiter ◽  
Kevin McDermott ◽  
Geof Hall ◽  
Prameet Sheth ◽  
Anna Majury
Keyword(s):  
Drinking Water ◽  
Geographic Region ◽  
Septic Tank ◽  
Salmonella Spp ◽  
E Coli ◽  
Small Water ◽  
Water Wells ◽  
Pathogen Prevalence ◽  
Enteric Infections ◽  
Water Volumes

Abstract Private water wells provide drinking water for an estimated 4.1 million households in Canada yet remain understudied in the context of microbial water quality or human health impacts. As there exists little systematic surveillance for enteric infections or outbreaks related to well water sources, consumers may be at risk of waterborne infectious diseases. A standard protocol in Ontario requires 200 mL of water, collected, and submitted by well owners, half of which is used to analyze for Escherichia coli and total coliforms (TCs). The aim of this study was to determine the efficacy of testing small water volumes and to survey for other contaminants in addition to bacterial indicators to inform pathogen prevalence and fecal source in drinking water wells. Samples were assessed for E. coli and TCs, by culture, and genetic markers of Bacteroides spp., Campylobacter spp., Salmonella spp., and Shiga toxin-producing E. coli, using qPCR. The source of fecal contamination varied by the geographic region and may be explained by septic tank density and underlying geology, among other factors. A small number of samples (1.9%) showed the evidence of contamination with enteric pathogens. Lastly, E. coli measured by qPCR, as opposed to culture, correlated more strongly to Bacteroides markers.

ACHIEVING SUPERIOR INTERNATIONALIZATION THROUGH STRATEGIC AMBIDEXTERITY

2007 ◽  
Vol 15 (01) ◽  
pp. 43-77 ◽  
Author(s):  
MARY HAN
Keyword(s):  
Multinational Enterprise ◽  
Field Research ◽  
New Venture ◽  
Superior Performance ◽  
International New Venture ◽  
Short Term ◽  
Firm Level ◽  
Optimal Approach ◽  
Level Performance

In this paper, I examine the optimal approach to internationalization. Drawing from the ambidexterity literature, I build on the concept of structural ambidexterity and suggest that the optimal approach occurs when firms pursue 'strategic ambidexterity,' which is characterized by simultaneously executing paradoxical strategies of pro-profit and pro-growth. I examine this approach through empirical study based on in-depth field research of two cases: Merrill Lynch, a multinational enterprise and Comdirect Bank, an international new venture. I find that a) firms that pursue strategic ambidexterity in their internationalization effort achieve above-average internationalization performance in the short term; and b) firms that pursue strategic ambidexterity in their internationalization effort also achieve above-average firm-level performance in the long term. I conclude that strategic ambidexterity is the optimal strategy by which to achieve superior performance.

Pesticides in groundwater and drinking water wells: overview of the situation in the Netherlands

2008 ◽  
Vol 57 (8) ◽  
pp. 1277-1286 ◽  
Author(s):  
P. N. M. Schipper ◽  
M. J. M. Vissers ◽  
A. M. A van der Linden
Keyword(s):  
Drinking Water ◽  
The Netherlands ◽  
Groundwater Resources ◽  
Shallow Groundwater ◽  
Monitoring Network ◽  
Fresh Groundwater ◽  
Water Abstraction ◽  
Pesticides Residues ◽  
Monitoring Wells ◽  
Water Wells

In the Netherlands, many of the fresh groundwater resources are vulnerable to pollution. Owing to high population densities and intensive farming practices, pesticide residues are found in groundwater at many places. Hence a number of drinking water abstraction wells contain pesticides residues, causing considerable costs for purification. The Water Framework Directive (WFD) requires countries to assess the chemical status of groundwater bodies and set up monitoring plans for groundwater quality, including pesticides. 771 groundwater samples were taken from monitoring wells in 2006 and analysed for a broad list of pesticides in order to fulfil these requirements. Pesticide were detected in 27% of samples, while in 11% the WFD limit of 0.1 μg/l was exceeded. In this paper, these and earlier measurements are evaluated further, considering also measurements in drinking water wells, information about the origin of measured pesticides and calculated trends in use and emissions. The measurements in the monitoring wells showed that where pesticides are used, 15–55% (minimal and maximal estimation) of the wells in shallow groundwater (1 to 20m below soil surface) contain pesticides residues at concentrations above 0.1 μg/l. When the metabolites BAM and AMPA are excluded (as not relevant in human toxicological terms), the estimation range is 7–37%. These patterns observed in shallow groundwater are reflected by the occurrence of pesticides in vulnerable abstraction wells that are used for the production of drinking water. The WFD requires the determination of both status and trends. The design of current monitoring network is evaluated from this perspective. Several recommendations are made for more adequate and efficient monitoring.

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