Assessing The Vertical Displacement Of The Grand Ethiopian Renaissance Dam During Its Filling Using Dinsar Technology And Its Potential Acute Consequences On The Downstream Countries,
2021
Chapman University
Assessing The Vertical Displacement Of The Grand Ethiopian Renaissance Dam During Its Filling Using Dinsar Technology And Its Potential Acute Consequences On The Downstream Countries, Hesham El-Askary, Amr Fawzy, Rejoice Thomas, Wenzhao Li, Nicholas Lahaye, Erik Linstead, Thomas Piechota, Daniele Struppa, Mohamed Abdelaty Sayed
Mathematics, Physics, and Computer Science Faculty Articles and Research
The Grand Ethiopian Renaissance Dam (GERD), formerly known as the Millennium Dam, is currently under construction and has been filling at a fast rate without sufficient known analysis on possible impacts on the body of the structure. The filling of GERD not only has an impact on the Blue Nile Basin hydrology, water storage and flow but also poses massive risks in case of collapse. Rosaries Dam located in Sudan at only 116 km downstream of GERD, along with the 20 million Sudanese benefiting from that dam, would be seriously threatened in case of the collapse of GERD. In this …
Umass Amherst Case Studies – Campus Center Plaza & Lederle Graduate Research Center,
2021
University of Massachusetts Amherst
Umass Amherst Case Studies – Campus Center Plaza & Lederle Graduate Research Center, Elliott Hambrook
UMassBRUT Community
This presentation discusses Gale’s recent experience with repair projects at two (2) brutalist structures on the Amherst Campus at UMass. A board-formed concrete retaining wall at the base of the Murray D. Lincoln Campus Center (Marcel Breuer, 1970) was tastefully modified, but retained, as part of a waterproofing replacement project, addressing water infiltration and improving sight lines across the Campus Center Plaza. The panelized precast concrete façades of the John W. Lederle Graduate Research Center (Campbell, Aldrich, & Nulty, 1969) received new exterior sealants, enlarged panel joints, PCB removal and encapsulation, supplemental panel anchorage, and a waterproof coating.
Wake Characteristics Of Wall-Mounted Finite Solid And Foam-Covered Cylinders,
2021
University of Windsor
Wake Characteristics Of Wall-Mounted Finite Solid And Foam-Covered Cylinders, Subhadip Das
Electronic Theses and Dissertations
The wake characteristics of a wall-mounted finite foam-covered cylinder are explored by comparing the flow properties with the wake of a solid cylinder. The velocity data are acquired experimentally using planar particle image velocimetry (PIV) and numerically by large eddy simulation at Reynolds number of 35100 based on the flow depth and 13100 based on the cylinder diameter. The wake characteristics may vary significantly if the approach flow properties change and also depend on the relative height of the boundary layer thickness with respect to the cylinder height. Therefore, it is a necessity to achieve a fully developed approach flow …
Infrastructure Risk Reduction: The Case Of Drinking Water Emergencies,
2021
Jacksonville State University
Infrastructure Risk Reduction: The Case Of Drinking Water Emergencies, Mark Paine
Dissertations
Public water systems are an integral part of community infrastructure. Drinking water contamination or service disruptions have the potential to cause economic losses, limit fire suppression capability, and result in human illnesses. Until 2016, the United States federal government had not issued a disaster declaration due to contaminated water. The first federal drinking water disaster declaration due to contaminated water serves as a sentinel event demonstrating the need to increase focus on public water systems during all phases of emergency management: mitigation, preparation, response, and recovery. Previous studies evaluating risks to vulnerable populations associated with drinking water primarily utilized qualitative …
Justification Of The Main Parameters And Operating Modes Of The Crushers-Shredders Of Coarse Feed,
2021
TIIAME
Justification Of The Main Parameters And Operating Modes Of The Crushers-Shredders Of Coarse Feed, K.D. Astanakulov, F.U. Karshiev, Sh.Kh. Gapparov
Irrigation and Melioration
The article presents the results of research on the justification of the parameters of the working bodies and operating modes of the mini crushers-shredders of coarse feed. On the basis of experimental research to study the effect of the rotor parameters Mini Crusher its qualitative performance indicators. According to the teachings found that rational parametres and operating modes-Crusher are: rotor length 350 mm; rotor diameter 550 mm; rotor speed 1290 min-1; the number of hammers 20 pcs; angle of rotation of the hammers 60.
Plan Dimensions Of The Flow Confinited By Cross Dams, On Rivers With Non-Symmetric Flooring,
2021
TIIAME
Plan Dimensions Of The Flow Confinited By Cross Dams, On Rivers With Non-Symmetric Flooring, M.R. Bakiev, U.A. Kahhorov, A.А. Jakhonov
Irrigation and Melioration
Improving methods and technologies for calculating and designing floodplain transverse dams, taking into account the interaction of floodplain and riverbed flows to protect the banks from erosion and regulate riverbeds is one of the most important tasks. At the same time, the priority remains the transverse blind dams made of local soil with the attachment of their head. Their construction on rivers with two-sided asymmetric floodplains has its own characteristics, which consist in the need to take into account the morphology, the different roughness of the floodplain and the channel, the interaction of floodplain and channel flows, the asymmetry of …
Study Of Performance Of Vertical Drainage Well Construction From Polymer Materials,
2021
TIIAME
Study Of Performance Of Vertical Drainage Well Construction From Polymer Materials, I.A. Akhmedov, Z.K. Mirkhasilova
Irrigation and Melioration
The article is devoted to the reconstruction and construction of vertical drainage wells. The use of vertical drainage wells is characterized by a decrease in the level of groundwater. The article presents data and typical regions of the use of vertical drainage wells.Also presented are mechanical, physical and chemical methods of well cleaning in practice. The information on the design and construction of vertical drainage wells is described. The analysis of corrosion resistance of vertical drainage well materials and their service life has been carried out. It is known that polymeric materials are resistant to corrosive environments. Using filters made …
Results Of Software Modeling Flow Section Of Vane Pumps,
2021
Doctor of Technical Sciences, Professor, Research Institute of Irrigation and Water Problems
Results Of Software Modeling Flow Section Of Vane Pumps, О.Я. Гловацкий, R.R. Ergashev, A.A. Abdullaev, J.I. Rashidov
Irrigation and Melioration
The article presents an analysis of data on the flow movement in a centrifugal pump, the results of which are aimed at improving the pump design in the direction of ensuring the flow of the flow without resistance to achieve energy savings in water transmission. To reduce slip on the pumps and to reduce the resistance to current flowing inside the pump to achieve energy savings, working impeller and spiral chamber shape are designed to be constructively correct. Data from pumping stations show that the performance of pumping equipment reduces water consumption by 10-12%, pressure by 18-20% and service life …
Economic Assessment Of A New Energy-Saving Electrical Technology For The Anesthesia Of Silkworms,
2021
TIIAME
Economic Assessment Of A New Energy-Saving Electrical Technology For The Anesthesia Of Silkworms, O.A. Khaliknazarov, A.A. Turdiboev, D.M. Akbarov, D.M. Akbarov
Irrigation and Melioration
The article provides information on the role of Uzbekistan in the world in the field of cocoons, the analysis of cocoon cultivation and primary processing technologies, technologies and technical devices currently used in primary cocoon processing. Suggestion of the use of ultra-high frequency (UV) electromagnetic field in the anesthesia of mulberry silkworm, technical specifications of the electrotechnical device for anesthesia of mulberry silkworm using ultra-high frequency (UV) electromagnetic field, and the implementation of this device SK-150K pilons The cost-effectiveness of the device was assessed, the cost-effective method achieved as a result of the research work is highlighted. According to the …
Main Directions Of Food Security In Uzbekistan (The Case Of Samarkand Province),
2021
TIIAME
Main Directions Of Food Security In Uzbekistan (The Case Of Samarkand Province), F.J. Saydullaeva
Irrigation and Melioration
The article assesses food availability as one of the indicators of food security on the example of Samarkand region based on a comparative analysis of the state of agricultural food production over the years and the volume of products per capita and their compliance with established recommended consumption norms. Based on the analysis, the results show that in Samarkand region in 2016-2020, agricultural food products were produced over recommended consumption norms per capita. The periodic evolution of the types of agri-food products produced by dehkan farms and owners of household land increased by 7.1% decreased by 7.3% on private farmers. …
The Economic Assessment Of Factors Affecting Small Household(Tomorka) In Rural Areas And Their Income,
2021
TIIAME
The Economic Assessment Of Factors Affecting Small Household(Tomorka) In Rural Areas And Their Income, Sh.A. Muratov
Irrigation and Melioration
In this research, the role and importance of income from small householding(tomorka) in rural areas, its specific features are analyzed. Economic factors were assessed through the tobit regression model of the factors influencing the formation of income from small households (tomorka) activities, and VIF (Variance inflation factor) test was conducted to determine their multicollinearity. Anonymous surveys of 170 landowners in 4 districts of Samarkand region have been used in the analysis. The age of landowners, the area of arable land, the consumption of organic and mineral fertilizers, the cost of seeds and seedlings, the cost of preparing the field for …
Impact And Application Of Real-Time Control On Stormwater Systems,
2021
University of Tennessee, Knoxville
Impact And Application Of Real-Time Control On Stormwater Systems, Aaron A. Akin
Doctoral Dissertations
Stormwater control measures (SCMs) such as dry extended detention basins and wet ponds are common practices implemented by engineers and designers to mitigate the impact of stormwater runoff. These practices are designed based on historical rainfall data to attenuate runoff to pre-development conditions and, once they are installed, are unable to adapt to changing rainfall patterns or watershed restoration objectives. To solve these climate resiliency issues, several studies were conducted which investigated the impact of retrofitting such systems with a controllable outlet to increase or change detention times during rainfall events along with the novel instrumentation and methodologies necessary for …
Develop A Multi-Functional Green Pervious Concrete (Mgpc) Pavement With Polycyclic Aromatic Hydrocarbons (Pahs) Removal Function.,
2021
University of Louisville
Develop A Multi-Functional Green Pervious Concrete (Mgpc) Pavement With Polycyclic Aromatic Hydrocarbons (Pahs) Removal Function., Hong Shang
Electronic Theses and Dissertations
Stormwater runoff induced Polycyclic Aromatic Hydrocarbons (PAHs) contaminant increasingly imperils the groundwater quality and the sustainable development of human society due to the potential carcinogenic risks. Pavement can be considered as the first line of defense for contaminant removal of the stormwater runoff. New construction materials with stormwater runoff quantity and quality control are in urgent demand for updating the existing pavement system. An innovative material called Multi-functional Green Pervious Concrete (MGPC) was developed in the department of Civil and Environmental Engineering at University of Louisville. This material uses organoclay as the amendment to enhance the PAHs removal capacity of …
A Novel Analytical Method For Evaluating The Characteristics Of Hydraulic Jump At A Positive Step,
2021
Isfahan University of Technology
A Novel Analytical Method For Evaluating The Characteristics Of Hydraulic Jump At A Positive Step, Milad Mohammadi, Mohammad Nazari-Sharabian, Moses Karakouzian
Civil and Environmental Engineering and Construction Faculty Research
We present a new method to evaluate the hydraulic jump characteristics in a horizontal rectangular channel with a positive step. We considered the flow curvature effect and the free surface’s small rise at the A-type hydraulic jump’s end. First, we present a novel method to give jump length estimation based on the similarity of the jump and the turbulent wall-jet, considering the pressure gradient. Then, considering the jump as a curvilinear flow and using a one-dimensional momentum equation, we present an accurate expression for the conjugate flow depth regarding the initial Froude number and step height. Finally, we compute the …
Quo Vadis Lakes Azuei And Enriquillo: A Future Outlook For Two Of The Caribbean Basin's Largest Lakes,
2021
CUNY Hunter College
Quo Vadis Lakes Azuei And Enriquillo: A Future Outlook For Two Of The Caribbean Basin's Largest Lakes, Mahrokh Moknatian, Michael Piasecki
Publications and Research
Lakes Azuei (LA) and Enriquillo (LE) on Hispaniola Island started expanding in 2005 and continued to do so until 2016. After inundating large swaths of arable land, submerging a small community, and threatening to swallow a significant trade route between the Dominican Republic and Haiti; worries persisted at how far this seemingly unstoppable expansion would go. The paper outlines the approach to a look forward to answer this question vis-à-vis climate change scenarios developed by the Intergovernmental Panel on Climate Change (IPCC). It uses numerical representations of the two lakes, and it examines how the lakes might evolve, deploying three …
Impact Of Regional Climate Changes On Changes In River Water Content In Uzbekistan,
2021
TIIAME
Impact Of Regional Climate Changes On Changes In River Water Content In Uzbekistan, A.T. Salokhiddinov, P.A. Khakimova, R.V. Toryanniova, O.A. Ashirova, A.G. Gofurov
Irrigation and Melioration
The paper presents the research results on the analysis of the climate change impacts on the potential of water resources in Central Asia. We analyzed the materials of an extensive database of monitoring data from numerous gauge stations on different river basins and satellite data information. A quantitative assessment of the transformation of river hydrographs, the growth of flow variability in the Republic of Uzbekistan's major rivers, in connection with climate change, was performed. The specific features of the impact of climate changes on changes in the water content of rivers in Uzbekistan in large and small river basins are …
Washing Technology For Medium And Highly Saline Soils,
2021
Scientific Research Institute of Irrigation and Water Problems
Washing Technology For Medium And Highly Saline Soils, B.K. Saliev, M. S. Yuldashev, N.O. Shaimanov
Irrigation and Melioration
The article discusses the issues of conducting field experiments to assess the reclamation conditions of soils, which are a particular issue of managing salinity and water-salt regime, as well as increasing the efficiency of desalination. Today, 46.6% of the irrigated lands of the Republic of Uzbekistan have salinization of varying degrees, of which 30.9% are weak, 13.3% are moderate and 2.5% are highly saline. Medium and highly saline lands make up 15.8%. The essence of the proposed method of flushing from the traditional one is that in late autumn or winter, the collectors-ditches are closed, and the groundwater is artificially …
Distribution Of Calcium And Its Reserve Forms In Widespread Irrigated Gray Meadow Soils Of The Syrdarya Region,
2021
Research Institute of Environment and Environmental Technologies
Distribution Of Calcium And Its Reserve Forms In Widespread Irrigated Gray Meadow Soils Of The Syrdarya Region, A. Akhatov
Irrigation and Melioration
The article examines the uneven distribution of calcium in reserve (general, potential, close and labile) forms in irrigated and gray-earth-meadow soils of the experimental section of the NIISSAVKH of the Gulistan district of the Syrdarya region and the farms "Sokhil" and "Ak altin" in irrigated meadow soils the form of a close reserve in the soil profile is 310 mg per 100 gr of soil. The upper layer of highly saline, medium loamy soil gradually decreases at a depth of 60-76 cm. layer. The labile calcium reserve in irrigated serozem-meadow, highly saline, medium loamy soils varies from 175 to 260 …
Design Of A Channel Straightening Route Using A Combined Dam With A Through Part Made Of Tetrahedra,
2021
TIIAME
Design Of A Channel Straightening Route Using A Combined Dam With A Through Part Made Of Tetrahedra, M.R. Bakiev, A.B. Хаlimbetov, С.Э. Шукурова, I.J. Asamatdinov
Irrigation and Melioration
The design of the route when regulating riverbeds, the direction of the flow to the point of water intake will require solving some issues, including the amount of deviation of the dynamic axis of the flow, constrained by regulatory structures. The main purpose of this work is to develop a method for calculating the deviation of the dynamic axis of a flow that is one-way constrained by a combined dam, then through part of which is made of tetrahedra. The problem is realized using the Varignon theorem and the flow conservation equation written for the streamlines where the household state …
Improvement Of Informational-Methodological Provision On Foreign Languages For Teachers,
2021
TIIAME
Improvement Of Informational-Methodological Provision On Foreign Languages For Teachers, G. Eshchanova
Irrigation and Melioration
The article discusses the innovative areas of activity, related to the use of information and communication technologies in the educational process of teachers in foreign languages in the world practice, the development of teachers professional communicative competence in teaching English, the use of information and communication, advanced pedagogical technologies in teaching to ensure the solution of such issues, as the increase in the level of development of foreign language skills, diagnostic technologies among teachers.
