Hydraulic Engineering Commons^™

Recommendations For The Analysis And Safety Assessment Of Turbid Sediments In Flood Reservoirs, А. Yangiev, Sh. Panjiev, D. Adjimuradov

Irrigation and Melioration

The article presents the results of field research conducted in Langar, Dehkanabad, Shurabsoy flood reservoirs in the Kashkadarya region.There are many problems as a result of floods in the reservoirs, there are disturbances in the discharge and drainage facilities during the passage of accidental floods.At the same time, there was a large accumulation of turbid-sediments in flood reservoirs.In the article, the results of the calculations using empirical formulas for predicting the amount of turbid sediments in Langar, Dehkanabad, Shurabsoy flood reservoirs up to 2025-2030 years are also presented, and it is noted that at present their useless volumes are full …

Justification Of Parameters Of Replaceable Working Parts Of A Combined Machine, А.A. Akhmetov, L.B. Muratov

Irrigation and Melioration

In article are described the design and options for completing the replaceable working parts of the combined machine for continuous tillage which of the formation of ridges and ridges for sowing re-crops. The parameters of the ridge former and apron-leveler of this machine have been substantiated. The rational values of the parameters of the comb-former are: length 600 mm, width of the entrance edge 680 mm, height of the blade 160 mm, length of the side edge of the blade 178 mm. The rational values of the working length and height of the leveling apron are 220 mm and 200 …

Development Of An Algorithm For Optimization Of Continuous Technological Process Of Cultivation Of Microorganisms, Sh.R. Rakhmanov

Irrigation and Melioration

In article the analysis of possible modes of microalgae cultivation has been carried out. Two optimization algorithms are substantiated. The first one is based on the method of random search with an absolute bias, an algorithm for optimizing the process of cultivating microorganisms with continuous regeneration of the flow in one cultivator. The second is an algorithm for determining the optimal residence time of chlorella particles in multistage cultivators, focused on the method of dynamic programming, implemented in Wellman's recurrence relation. The developed algorithm for operational forecasting and automatic control of the chlorella cultivation process allows, under given production conditions …

Covid-19 Impact To Family Food Consumption And Income In Uzbekistan: Results Of An Online Survey, Kh. Pardaev, Sh. Hasanov, S. Mamasoliev, Sh. Muratov, R. Kalandarov, U. Nurullaev

Irrigation and Melioration

This article aims to study the impact of the pandemic on food consumption by families in Uzbekistan. The shock of the pandemic is threatening the well-being of families in Uzbekistan, as in all developing countries. The study focuses on the effects of changes in food prices, declining consumption, and changes in household incomes. The Instrumental regression model was used in the factor impact analysis. Data for analysis were collected online by messenger groups from families in urban and rural areas of Uzbekistan. Results of the Econometric analysis demonstrated that the decline in food consumption in households was assessed by a …

Status Of Crop Diversification And Its Empirical Analysis: A Case Study Of The Republic Of Uzbekistan, A.E. Primov

Irrigation and Melioration

The main objective of this study is to determine the status and level of crop diversification among farms in the country through an empirical analysis using panel data collected in 2009-2017. In doing so, we performed the Stata-16 software using the Simpson Diversification Index model in determining the diversification index. According to the results, the highest diversification indicators were found for Samarkand, Fergana and Tashkent regions, respectively, and accounted for 0.74, 0.74 and 0.76, respectively. It can be seen that the existing farms in Tashkent region used more diversified crops than in other regions of the country. The average diversification …

Efficiency Of Using Graphic Software In The Design Of Hydrotechnical Structures, U.A. Nasritdinova, A.M. Khodjaev, Z.I. Kayumova

Irrigation and Melioration

The article examines the work of scientists engaged in research in this area in the design of hydrotechnic structures. The possibilities of design programs for the application of the results of scientific research in the educational process were used. Thanks to the design in these programs, practical tasks are carried out with the utmost precision. The use of computer technology in teaching the subject "Hydrotechnical structures" and the use of graphic software AutoCAD in the design of linear platforms for clothing, curved platforms for clothing from hydrotechnical structures are shown in 2D and 3D three-dimensional modeling.

Stream Power Analysis Of The Mid-Barataria Conveyance Channel Model, Jack Graham

LSU Master's Theses

Louisiana’s coast is disappearing at an alarming rate. Erosion, subsidence, sea level rise, and the devastating impacts from hurricanes have contributed to the loss of thousands of square miles of land that was once a thriving ecosystem. The Louisiana government is taking action to help protect and restore these coastal habitats, which are a home to some two million people and numerous species of animals, birds, and fish. The Mid-Barataria Sediment Diversion is a new type of project to help create land in Barataria Basin. Conceptually, the diversion is designed to use the available sediment and stream power provided by …

The Impact Of Precipitation On The Groundwater Of Coal Waste Dump, Tomasz Suponik, Dawid Franke, Robert Frączek, Katarzyna Nowińska, Piotr Pierzyna, Zenon Różański, Paweł Wrona

Journal of Sustainable Mining

The aim of the study was to assess the effect of climate change, mainly higher and lower precipitation, on the intensity of the impact of a coal waste dump on groundwater. The analysis used meteorological data for the Katowice region in 2002-2020 as well as data on the height of the groundwater table in the vicinity of the coal waste dump, and data on physicochemical parameters and chemical composition of groundwater in 2004-2020. Based on the analyses, it was found that the periods of drought in the Silesian Voivodeship, located in the south of Poland, occurred mainly in spring, while …

Non-Newtonian Model Development For Post-Wildfire Flood Risk Management, Ian Eli Floyd

LSU Doctoral Dissertations

Wildfire effected regions of the western U.S. frequently produce non-Newtonian floods (or floods that have a non-linear relationship between stress and deformation) in response to moderate to severe precipitation events. This research presents the development, evaluation, and demonstration of a post-wildfire hydrodynamic one-dimensional and two-dimensional diffusive wave and shallow-water numerical modeling approach that can be used to predict post-wildfire downstream runout of debris flows and floodplain inundation conditions. While researchers have developed a variety of Non-Newtonian approaches to simulate debris flows and mudflows, there has been very limited application to post-wildfire flooding. This can make it difficult to understand the …

Operation Procedures Of Mid-Barataria Sediment Diversion Model To Reproduce Hydraulics And Sediment Transport, Chase Holston

LSU Master's Theses

The Lower Mississippi River Physical Model (LMRPM) is a distorted, movable bed model that simulates the hydraulics and sediment transport in the lower 195 miles of the Mississippi River. Carved into the model are both existing hydraulic structures, such as the Bonnet Carré Spillway, and proposed structures, such as the Mid-Barataria Sediment Diversion (MBSD). The MBSD will be the first sediment diversion built as part of Louisiana’s Coastal Master Plan, so incorporating the diversion in the LMRPM will be a useful tool to understanding how the diversion can impact the river hydraulics and bedload transport. The objective of this thesis …

Renewable Energy Generation And Ghg Emission Reduction Potential Of A Satellitewater Reuse Plant By Using Solar Photovoltaics And Anaerobic Digestion, Jonathan R. Bailey, Saria Bukhary, Jacimaria R. Batista, Sajjad Ahmad

Civil and Environmental Engineering and Construction Faculty Research

Wastewater treatment is a very energy-intensive process. The growing population, increased demands for energy and water, and rising pollution levels caused by fossil-fuel-based energy generation, warrants the transition from fossil fuels to renewable energy. This research explored the energy consumption offset of a satellite water reuse plant (WRP) by using solar photovoltaics (PVs) and anaerobic digestion. The analysis was performed for two types of WRPs: conventional (conventional activated sludge system (CAS) bioreactor with secondary clarifiers and dual media filtration) and advanced (bioreactor with membrane filtration (MBR)) treatment satellite WRPs. The associated greenhouse gas (GHG) emissions were also evaluated. For conventional …

Flood Hazard Assessment For The Tori Levee Breach Of The Indus River Basin, Pakistan, Babar Naeem, Muhammad Azmat, Hui Tao, Shakil Ahmad, Muhammad Umar Khattak, Sajjad Haider, Sajjad Ahmad, Zarif Khero, Christopher R. Goodell

Civil and Environmental Engineering and Construction Faculty Research

Levee breaches are some of the most common hazards in the world and cause the loss of lives, livelihoods, and property destruction. During the 2010 flood in Pakistan, the most devastating breach occurred at Tori Levee on the right bank of the Indus River, downstream of the Guddu Barrage, which caused residual floods in northern Sindh and the adjoining regions of the Balochistan province. In this study, 2D unsteady flow modeling performed for Tori Levee breach computed residual flood inundation by coupling a HEC-RAS (Hydrological Engineering Centre-River Analysis System) 2D hydraulic model with remote sensing and Geographic Information System techniques. …

Moving Beyond ‘More Crop Per Drop’: Insights From Two Decades Of Research On Agricultural Water Productivity, Meredith Giordano, Susanne M. Scheierling, David O. Tréguer, Hugh Turral, Peter G. Mccornick

Daugherty Water for Food Global Institute: Faculty Publications

Concern over increasing water scarcity has led to the introduction of the concept of agricultural water productivity and an emphasis on interventions to achieve ‘more crop per drop’. Yet, a strong debate continues on how the concept is to be defined and used. Drawing largely from the irrigation literature, the origins of the concept and its methodological developments are reviewed, and its use in applied work over two decades is discussed. Based on this analysis of conceptual and applied research, key insights into the concept’s contributions and limitations are presented, as well as opportunities for further refinements.

Asset Management Framework For The United States Army Corps Of Engineers Lock And Dam Electrical Equipment, Megan Elizabeth Bates

Theses, Dissertations and Capstones

The focus of this thesis is to design an efficient and effective preventative maintenance program for the electrical equipment that the United States Army Corps of Engineers (USACE) operates at the locks and dams. This thesis presents the concept of asset management and designs a framework to manage the electrical assets at USACE. The methodology was tested, and the results validated the framework proposed in this thesis. The framework was tested on two separate projects and the results were the same optimized strategies, which shows that the framework is robust and can be implemented into each project and can give …

Nebraska Water Center Annual Report 2019-2020

Nebraska Water Center: Administrative Materials

Contents

Introduction: Foreword • Director’s Letter • Nebraska Water Center (NWC) Overview and Timeline • In Memoriam: Kyle Hoagland

Research • Water Sciences Laboratory • Nebraska Vadose Zone Program • Ogallala Water Coordinated Agriculture Project • Water for Agriculture Project • Greeley Award • U.S. Geological Survey 104b Projects

Extension & Outreach: NWC Events • Nebraska Nitrate Initiative • Bazile Groundwater Management Area • Water and Integrated Crops Hub • Water Faculty Directory • State Legislative Funding • Water Resources Advisory Panel

Teaching: Know Your Well • Sorab Panday Spotlight • NWC Postdoc Profiles • NWC Student Intern Profiles • …

Hydraulic Balsa Wood Rising Bridge, Kaitlyn Greenfield

All Undergraduate Projects

What is the solution to allowing tall vessels to navigate past a vehicle bridge that is less than 10 [ft] above the water? To answer this question, a balsa wood bridge was designed, constructed, and tested. The bridge needed to articulate by mechanical means, allow for travel through the bridge, and be able to withstand ample force while the main structure only being constructed of balsa wood and glue. The project was analyzed in sections. These sections include: the bridge structure and its members, the hydraulic lift, and the pins needed for the bridge and hydraulic lift to operate. The …

The Roles Of Groundwater Table In Catchment Hydrology, Lili Yao

Electronic Theses and Dissertations, 2020-2023

The main goal of this dissertation research is to investigate catchment hydrological processes including infiltration and saturation excess runoff generation with consideration of groundwater table. For the infiltration process, an infiltration Péclet number was proposed to quantify the relative effects of gravity and capillary force on the evolution of infiltration capacity in the special case of the presence of a shallow water table, and a power law functional form of Time Compression Approximation was developed whose exponent was found to vary with the Péclet number. For the saturation excess runoff process, a new probability distribution model based on the SCS …

A Study Of Geographic Information System-Based Watershed Processing For Hydrologic Analysis Of Ungauged Watersheds, Philip Adanbe Adalikwu

Electronic Theses and Dissertations

The increasing application of geographic information system (GIS) technology in watershed modeling makes is necessary to further evaluate its impacts on runoff characteristics as a basis for improved hydrologic analysis in ungauged watersheds. Experts in the field of water resources and hydrology have recommended the practice of subdivision when modeling a watershed, and the use of observed data from hydrologically similar watershed to calibrate and validate an ungauged watershed’s model. However, previous studies have failed to adequately address the issues of watershed heterogeneity, spatial and temporal variability in physical parameters, GIS data resolution issues, including artifacts in automated extraction of …

Laboratory Measurements Of Bed Shear Stress In Open Channel Flow And Soil Erosion Rate In Cohesive Soils, Gunnar Schurmann Kern

Electronic Theses and Dissertations

The relationship between soil erosion rate and bed shear stress is an important problem in sediment transport and scour. However, reliable measurements of the soil erosion function are challenging, both in the field and in the laboratory. The objective of this study is to investigate an experimental setup for conducting bed shear stress and soil erosion rate measurements using an open channel flume with a rough bed. These experiments were performed in an A-8 Hydraulic Channel with a fixed gravel bed. The flow discharge was kept constant at 0.158 ft.3/s, and bed shear stress was varied by changing the channel …

A Hydrologic Climate Study For An Arid Region, Ali Alsubeai

Electronic Theses and Dissertations

Water is the most precious natural resource in arid regions due to the limitation of water resources, expanding population, and increasing volumes of industrial and domestic waste. The purpose of this research was to evaluate methods to estimate water quantity in an arid region. The research consisted of three separate studies. In the first study, hydrologic models used to estimate water quantity were evaluated for suitability of use in arid regions. Most hydrologic models that have been used in arid regions were originally developed for humid regions. Rainfall events in arid regions can be characterized as short-term, high intense rainstorms …

Pesticide Occurrence And Persistence Entering Recreational Lakes In Watersheds Of Varying Land Uses, Jessica Satiroff, Tiffany Messer, Aaron R. Mittelstet, Daniel D. Snow

Nebraska Water Center: Faculty Publications

Currently little is known of newer pesticide classes and their occurrence and persistence in recreational lakes. Therefore, the objectives of this study were to (1) assess average pesticide concentrations and loadings entering recreational lakes in three mixed land use watersheds throughout the growing season, (2) evaluate pesticide persistence longitudinally within the lakes, and (3) perform an ecotoxicity assessment. Six sampling campaigns were conducted at three lakes from April through October 2018 to measure the occurrence and persistence during pre, middle, and post growing season. Polar organic chemical integrative samplers (POCIS) were placed in streams near lake inlets and monthly samples …

Occurrence Of Arsenite In Surface And Groundwater Associated With A Perennial Stream Located In Western Nebraska, Usa, Arindam Malakar, Rajesh Singh, Jeffrey Westrop, Karrie A. Weber, Christopher N. Elofson, Manish Kumar, Daniel D. Snow

Nebraska Water Center: Faculty Publications

Dissolved arsenic typically results from chemical weathering of arsenic rich sediments and is most often found in oxidized forms in surface water. The mobility of arsenic is controlled by its valence state and also by its association with iron oxides minerals, the forms of which are both influenced by abiotic and biotic processes in aqueous environment. In this study, speciation methods were used to measure and confirm the presence of reduced arsenic species in the surface water of Frenchman creek, a gaining stream that crosses the Colorado- Nebraska border. Selective extraction analysis of aquifer and stream bed sediments shows that …

Optimal Multi-Reservoir System Operations Under Inflow Scenarios In Nam Ngum River Basin, Lao Pdr, Bounhome Kimmany

Chulalongkorn University Theses and Dissertations (Chula ETD)

The Nam Ngum River is one of the main rivers in Lao PDR. Many hydropower projects are currently operated, under construction, and in the planning stage within the Nam Ngum River Basin (NNRB). These hydropower projects are managed by different organizations which could lead to conflict in operation and hinder the achievement of national developments. The main objective of this research is therefore to develop an optimization model for maximizing hydropower production in the NNRB through optimal reservoir operation under the impact of climate change. The potential consequence of maximizing hydropower production that could lead to flooding was also considered …

Hydraulic Assessment Of Traditional And Fish-Friendly Tide Gates In Humboldt Bay, California, Marcela Anne Jimenez

Cal Poly Humboldt theses and projects

Tide gates are common hydraulic structures located throughout coastal and estuarine areas that prevent tidal waves from flooding previously converted tidally influenced areas. As restoration efforts increase, more “fish-friendly” tide gates that allow for larger openings and longer opening periods are being installed to improve habitat for threatened or endangered species. The purpose of this thesis was to determine discharge and head loss coefficients for traditional and side-hinged tide gates that could be inputs for hydraulic models and improve tide gate sizing and design. The study sites included Gannon Slough and US 101 Slough in Humboldt, California that represented a …

Wave Climate Associated With Changing Water Level And Ice Cover In Lake Michigan, Chenfu Huang, Longhuan Zhu, Gangfeng Ma, Guy A. Meadows, Pengfei Xue

Civil & Environmental Engineering Faculty Publications

Detailed knowledge of wave climate change is essential for understanding coastal geomorphological processes, ecosystem resilience, the design of offshore and coastal engineering structures and aquaculture systems. In Lake Michigan, the in-situ wave observations suitable for long-term analysis are limited to two offshore MetOcean buoys. Since this distribution is inadequate to fully represent spatial patterns of wave climate across the lake, a series of high-resolution SWAN model simulations were performed for the analysis of long-term wave climate change for the entirety of Lake Michigan from 1979 to 2020. Model results were validated against observations from two offshore buoys and 16 coastal …

Reduction Of Energy Consumption Through Pump Efficiency Analysis, Riley Dodds

Williams Honors College, Honors Research Projects

Water scarcity, global warming, lack of fossil fuels, and future Green Act goals and legislature are at the forefront of policy change and election discussion within the United States. As civil engineers these topics are heavily discussed and challenged within the field and new solutions along with innovations are in constant demand. Within the community of Akron, the Akron Water Supply Water Plant continues to actively innovate and solve numerous concerns ranging from the quality of water to the overall operating costs. Energy consumption cost Akron Water Supply over $952,914.32 and 14,411,960 of kilowatts per hour of electrical energy to …

Nanomaterials In The Environment, Human Exposure Pathway, And Health Effects: A Review, Arindam Malakar, Sushil R. Kanel, Chittaranjan Ray, Daniel D. Snow, Mallikarjuna N. Nadagouda

Daugherty Water for Food Global Institute: Faculty Publications

Nanomaterials (NMs), both natural and synthetic, are produced, transformed, and exported into our environment daily. Natural NMs annual flux to the environment is around 97% of the total and is significantly higher than synthetic NMs. However, synthetic NMs are considered to have a detrimental effect on the environment. The extensive usage of synthetic NMs in different fields, including chemical, engineering, electronics, and medicine, makes them susceptible to be discharged into the atmosphere, various water sources, soil, and landfill waste. As ever-larger quantities of NMs end up in our environment and start interacting with the biota, it is crucial to understand …

Baseflow Nitrate Dynamics Within Nested Watersheds Of An Agricultural Stream In Nebraska, Usa, Galen Richards, Troy E. Gilmore, Aaron R. Mittelstet, Tiffany Messer, Daniel D. Snow

Daugherty Water for Food Global Institute: Faculty Publications

There is a need to evaluate high surface nitrate concentrations across agricultural watersheds, both spatially and temporally, to increase understanding of source and timing of nitrogen loads in streams and rivers. Bazile Creek is a high-nitrate stream originating in the agriculturally intensive Bazile Groundwater Management Area of Eastern Nebraska, USA. It is a gaining stream that receives groundwater with high nitrate concentrations originating from nonpoint sources. The objective of this study was to determine spatial and temporal variability of baseflow nitrate concentrations in Bazile Creek and its tributaries and to relate this variability to watershed characteristics. Surface-water nitrate samples were …

Surveillance Of Plasticizers, Bisphenol A, Steroids And Caffeine In Surface Water Of River Ganga And Sundarban Wetland Along The Bay Of Bengal: Occurrence, Sources, Estrogenicity Screening And Ecotoxicological Risk Assessment, Paromita Chakraborty, Nancy W. Shappell, Moitraiyee Mukhopadhyay, Sathaporn Onanong, Daniel D. Snow

Daugherty Water for Food Global Institute: Faculty Publications

The transboundary River Ganga serves as a conduit for meltwater from the Himalayas and is a major freshwater source for two thirds of Indian population before emptying into the Sundarban Delta, the largest estuary in the Bay of Bengal. Endocrine disrupting compounds (EDCs) such as phthalic acid esters (PAEs) and bisphenol A (BPA) used as organic plastic additives can pollute the aquatic environment receiving plastic litter. Hence, we have investigated these EDCs in water samples from Ganga and Sundarban wetland of India. Since these compounds exhibit estrogenic potential, we have further measured steroids and evaluated the estrogenic activity (estradiol equivalents, …

Transmission Routes Of The Microbiome And Resistome From Manure To Soil And Lettuce, Yuepeng Sun, Daniel D. Snow, Harkamal Walia, Xu Li

Daugherty Water for Food Global Institute: Faculty Publications

The land application of animal manure can introduce manure microbiome and resistome to croplands where food crops are grown. The objective of this study was to characterize the microbiome and resistome on and in the leaves of lettuce grown in manured soil and identify the main transmission routes of microbes and antibiotic resistance genes (ARGs) from soil to the episphere and endosphere of lettuce. Shotgun metagenomic results show that manure application significantly altered the composition of the microbiome and resistome of surface soil. SourceTracker analyses indicate that manure and original soil were the main source of the microbiome and resistome …