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.
Дождеваsome Aspects Of Water Management In The Republic Of Uzbekistan During The Period Of Independence (Reality And Forecast),
2021
Ministry of Higher and Secondary Specialized Education of the Republic of Uzbekistan
Дождеваsome Aspects Of Water Management In The Republic Of Uzbekistan During The Period Of Independence (Reality And Forecast), S. Khodjaev
Irrigation and Melioration
To date, there is no alternative to the introduction of the principles of integrated water resources management (IWRM), this is proved by the research of SIC ICWC on the territory of the South Fergana main canal, where the specific water supply per hectare of irrigated area has been reduced by 32% on an area of 120 thousand hectares, that is up to 7 thousand m³/ha, instead of the limited ones 10 thousand m³/ha. Researches recommend cutting off all types of collector-drainage waters (CDW) from the river trunks of the Aral Sea basin, including the Syr-Darya and Amu-Darya, since CDW are …
The Influence Of Gender Approaches On Education Efficiency,
2021
TIIAME
The Influence Of Gender Approaches On Education Efficiency, G. Eshchanova
Irrigation and Melioration
The given article covers the influence of gender approaches on education efficiency on the basis of statistical and scientific data, and the need to rely on the basis of the necessary knowledge for the ecologically sustainable development of women's knowledge, competence and entrepreneurship are shown. The educational process based on Gender differences and equality contributes significantly to the development of society.
Economic Assessment Of Factors Affecting The Decision Of Households To Engage In Non-Farm Activities,
2021
Muratov
Economic Assessment Of Factors Affecting The Decision Of Households To Engage In Non-Farm Activities, Sh.A. Muratov
Irrigation and Melioration
In this study, non-farm activities and their importance were studied, and it is analysed the influence of push and pull factors on the decision of family heads to engage in non-farm activities by Probit model regression. Furthermore, it is determined their elastic coefficients. The analysed data are collected by conducting an online survey from 134 respondents. The results are showed that the decision of family heads to engage in non-farm activities was greatly influenced by their gender, education, and number of family members, electricity supply, transport services, and size of their land. Namely, the decision of the head of the …
Identifying The Determinants And Extent Of Crop Diversification At Farm Level: A Case Study Of Uzbekistan,
2021
Tashkent State Agrarian University
Identifying The Determinants And Extent Of Crop Diversification At Farm Level: A Case Study Of Uzbekistan, A.Э. Primov, M.H. Saidov, I. B. Rustamova, A.A. Abduvasikov
Irrigation and Melioration
Since independence, the government of Uzbekistan has implemented the number of agricultural policies such as making some crucial structural reforms at the farms, comprising different institutions and enhancing diversification of agricultural production in order to stabilize the agricultural sector of the country. Therefore, crop diversity has an important role in sustainable agriculture. We calculated the diversification index based on the Simpson Diversity Index method while ordinary least square (OLS) regression analysis was employed to assess the association of crop diversification on farm income using cross-sectional data from 381 farmers of Uzbekistan. The study revealed the mean computed Simpson Index values …
Simulation Of Compound Flood Events In Low-Gradient Coastal Watershed,
2021
Louisiana State University and Agricultural and Mechanical College
Simulation Of Compound Flood Events In Low-Gradient Coastal Watershed, Felix Luis Santiago-Collazo
LSU Doctoral Dissertations
Low-gradient coastal watersheds are susceptible to flooding caused by various flows such as rainfall, tides, and storm surge. Compound flooding occurs when at least two of these mechanisms happen simultaneously or in close succession. Different inundation models, observed data, and/or a combination of these are coupled through varying techniques involving one-way, loosely, tightly, or fully coupled approaches to assess compound flooding. This study presents a one-dimensional (1-D), fully coupled compound inundation model based on the Shallow Water equations. This model approach simultaneously simulates the free water surface variations in the ocean domain (i.e., tide and storm surge modeling), rainfall-runoff in …
Biotransformation Of Doxycycline By Brevundimonas Naejangsanensis And Sphingobacterium Mizutaii Strains,
2021
China University of Geosciences
Biotransformation Of Doxycycline By Brevundimonas Naejangsanensis And Sphingobacterium Mizutaii Strains, Ting He, Jianguo Bao, Yifei Leng, Daniel D. Snow, Shuqiong Kong, Tong Wang, Xu Li
Nebraska Water Center: Faculty Publications
The fate of doxycycline (DC), a second generation tetracycline antibiotic, in the environment has drawn increasing attention in recent years due to its wide usage. Little is known about the biodegradability of DC in the environment. The objective of this study was to characterize the biotransformation of DC by pure bacterial strains with respect to reaction kinetics under different environmental conditions and biotransformation products. Two bacterial strains, Brevundimonas naejangsanensis DD1 and Sphingobacterium mizutaii DD2, were isolated from chicken litter and characterized for their biotransformation capability of DC. Results show both strains rely on cometabolism to biotransform DC with tryptone as …
Modeling The Groundwater Basin In The Northern Cities Management Area,
2021
Student
Modeling The Groundwater Basin In The Northern Cities Management Area, Allyson Swain
Master's Theses
A model was developed to simulate the groundwater of 8,300 acres of the Northern Cities Management Area (NCMA), which encompasses the northern portion of the Arroyo Grande Watershed and a small subset of the Santa Maria Valley Groundwater Basin. This watershed and groundwater basin is located on the coast and contains Oceano and the Cities of Arroyo Grande, Grover Beach, Pismo Beach. Groundwater in the NCMA is used heavily for agricultural irrigation in the southern portion and municipal applications in the northern portion. Up to 18 of these municipal wells and over 50 irrigation wells are drawing groundwater at any …
Evaluating Hazus-Mh Flood Model Consequence Assessments Of Urban And Rural Coastal Landscapes Using Adcirc Generated Flood Data From Hurricanes Isaac And Laura,
2021
Louisiana State University and Agricultural and Mechanical College
Evaluating Hazus-Mh Flood Model Consequence Assessments Of Urban And Rural Coastal Landscapes Using Adcirc Generated Flood Data From Hurricanes Isaac And Laura, Katherine Faye Jones
LSU Master's Theses
Emergency managers rely on a variety on models and outputs, such as Hazards United States Multi- Hazard (Hazus-MH) and the Coastal Emergency Risk Assessment (CERA) visualization tool, to make decisions in the days leading up to and following hurricane events. This study focuses on using Hurricane Isaac (2012) and Hurricane Laura (2020).ASGS-CERA geoTIFFs, created from generated ADCIRC Prediction System data, in the Hazus-MH Flood Model to test using these two tools together in urban and rural areas. These ASGS-CERA integrated Hazus-MH studies were compared with Hazus-MH studies using the standard Hazus-MH surge methodology. They were tested for accuracy in both …
Low Impact Development Mitigation For Base Flood Elevation Disparity Between Adjacent Properties,
2021
University of New Orleans
Low Impact Development Mitigation For Base Flood Elevation Disparity Between Adjacent Properties, Shaelynn Moore
University of New Orleans Theses and Dissertations
Disputes between adjacent property owners in which new development at higher elevation requirements has caused adverse effects in stormwater drainage towards lower, older developments has recently grown in concern. The difference of elevations between properties causes a faster sheet flow effect that bypasses existing drainage paths in the servitude. The goal of this research is to design a low impact development methodology that encourages detention and redirection back toward the shared drainage boundary. Detention is encouraged through subsurface infiltration, storage and re-direction of the flow path. Infiltration trench simulations using EPA’s SWMM software were used to mirror the new LID …
Quantifying Discharge On The Lower Mississippi River Physical Model,
2021
Louisiana State University and Agricultural and Mechanical College
Quantifying Discharge On The Lower Mississippi River Physical Model, Taylor S. Cagle
LSU Master's Theses
The Lower Mississippi River Physical Model (LMRPM) is a distorted, movable-bed physical model that replicates the hydraulics and bedload (sand) transport of the lower 195 miles of the Mississippi River. One year of flow and sediment transport on the prototype can be modeled in approximately one hour. With the ability to simulate long periods of time on the Lower Mississippi River in such a short time frame, the model can provide unique insight into subjects such as the potential effects from relative sea level rise on the lower river’s hydraulics and sediment transport. Quantifying discharge on the LMRPM is an …
Application Of Machine Learning In Flood Depth Prediction,
2021
University of Texas at El Paso
Application Of Machine Learning In Flood Depth Prediction, Armando Esquivel
Open Access Theses & Dissertations
Machine learning technologies have helped provide answers for problems with a high degree of complexity. Machine learning has been utilized by various disciplines within the Civil Engineering profession and has proven to be efficient in solving complex problems. Although machine learning is being used in the Civil Engineering profession, a formal framework on developing and integrating machine learning has not been developed for flood depth prediction. The proposed word uses machine learning to predict the depth of flood at Houston, TX, due to a 100-year 24-hour storm. The proposed work can be used to collect, store and analyze data to …
Enercon Station Vacuum Pump Replacement,
2021
Kennesaw State University
Enercon Station Vacuum Pump Replacement, Clint Hembree, Jared D'Amico, Connor Moore, Paul Jeffrey Fontenot, Sydnee Castello, J.J. Clements
Senior Design Project For Engineers
This details the progress of the ENERCON pump replacement project as completed by the Kennesaw State University interdisciplinary senior design group. This project is a two-semester capstone effort for the engineering program at Southern Polytechnic School of Engineering, overseen by Dr. McFall during Fall 2020 and Dr. Khalid during Spring 2021 semesters. The 2020-2021 KSU Interdisciplinary Senior Design team was tasked with completing an Engineering Change Package (ECP) for existing vacuum pumps at ENERCON Station. The mechanical, electrical, and civil students worked together, performing evaluations on existing plant systems to ensure the plant could support the new vacuum pumps. By …
Removal Of Carbamazepine Onto Modified Zeolitic Tuff In
Different Water Matrices: Batch And Continuous
Flow Experiments,
2021
Royal Scientific Society
Removal Of Carbamazepine Onto Modified Zeolitic Tuff In Different Water Matrices: Batch And Continuous Flow Experiments, Othman A. Al-Mashaqbeh, Diya A. Alsafadi, Layal Z. Alsalhi, Shannon L. Bartelt-Hunt, Daniel D. Snow
Nebraska Water Center: Faculty Publications
Carbamazepine (CBZ) is the most frequently detected pharmaceutical residues in aquatic environments effluent by wastewater treatment plants. Batch and column experiments were conducted to evaluate the removal of CBZ from ultra-pure water and wastewater treatment plant (WWTP) effluent using raw zeolitic tuff (RZT) and surfactant modified zeolite (SMZ). Point zero net charge (pHpzc), X-ray diffraction (XRD), X-ray fluorescence (XRF), and Fourier Transform Infrared (FTIR) were investigated for adsorbents to evaluate the physiochemical changes resulted from the modification process using Hexadecyltrimethylammonium bromide (HDTMA-Br). XRD and FTIR showed that the surfactant modification of RZT has created an amorphous surface with new alkyl …
