Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 39 for “"Other Civil and Environmental Engineering"”.
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Odor Monitoring at Wastewater Treatment Plants
… (H<sub>2</sub>S) is notable for its toxicity and corrosion is one of the major sources of odor in wastewater treatment plants. Evaluation of existing or potential odor problems requires knowledge of the type of compounds likely to cause such problems and the mechanism of their formation in …
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Modeling Artificial Groundwater Recharge in the Santa Rosa Creek Watershed
… Rosa Creek as it passes through agricultural land and the town of Cambria. Historically the groundwater within the Santa Rosa Creek Watershed has been used for irrigation, municipal and domestic uses, and the creek is critical habitat steelhead trout. During dry years, there is less water for …
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Analysis of the Tidal Range in the Sacramento San Joaquin Delta from 1857 to Present
… mid-1800s from mining, agriculture, dredging, and urbanization. Did the resulting modifications to channel width, depth, and length alter tidal range in the Sacramento San Joaquin Delta?</p> <p>In this study, archival tidal records were evaluated at many stations throughout the San Francisco …
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The Influence of Sea-Level Rise on Salinity in the Lower St. Johns River and the Associated Physics
… in the lower St Johns River is spatially and temporally variable, whereby the salinity distribution is driven primarily by the combination of ocean processes of tides and storm surges and hydrological processes of watershed runoff. This study examines the probability distributions and …
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Comparison of Two Advanced Oxidation Processes for Their Production of Hydroxyl Radicals and Evaluation of a UV/Ozone AOP at Varying UV Fluence for Treating Diclofenac
… degradation of emerging contaminants. Drought and water shortage have become pressing issues caused by our world’s changing climate. Water reclamation and reuse are increasingly important options for relieving this water stress. Water reuse runs the risk of reintroducing recalcitrant compounds …
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Improved Microalgal Biomass Harvesting Using Optimized Environmental Conditions and Bacterial Bioflocculants
… MICROALGAL BIOMASS HARVESTING USING OPTIMIZED ENVIRONMENTAL CONDITIONS AND BACTERIAL BIOFLOCCULANTS</strong></p> <p><strong>DEREK CONTE MANHEIM</strong></p> <p>The cost and energy balance of microalgae biofuel production is sensitive to the algae harvesting method, among many other factors. …
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2-D NON-LINEAR FINITE ELEMENT ANALYSIS OF FOLSOM DAM: SEISMICALLY INDUCED SEPARATION AND PORE PRESSURE ALONG THE SOIL-CONCRETE INTERFACE
… understood. During a ground shaking, bonding and de-bonding action along the interface may cause significant separation of soil and concrete surfaces, and such a separation may take place at any depth along the interface creating a stability concern for the overall dam. Moreover, the …
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Evaluation of Long Term Effects of Erosion Due to Groin Placement in the Northern Yucatan Peninsula
… of groin placement on beach re-nourishment and beach restoration in the Yucatan peninsula. The study includes the evaluation of six control points located on Chelem beach in Yucatan, Mexico, very close to the Progreso pier. The control points were set up in an active groin field to record …
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A Framework for Developing and Integrating Effective Routing Strategies Within the Emergency Decision Support System
… be used for devising strategies for evacuation and emergency response in case of a disaster.</p> <p>This thesis describes the modeling, calibration, and validation of the VISSIM traffic simulation model coded for downtown San Jose. The network is then used to test various evacuation scenarios to …
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Lipid Productivity of Algae Grown on Dairy Wastewater as a Possible Feedstock for Biodiesel
… create renewable energy in the form of biodiesel and digester biogas, remove polluting nutrients, and abate greenhouse gases. Research under the Department of Energy Aquatic Species Program during 1978-1996 concluded that cultivating algae for biofuels was cost prohibitive at that time and that an …
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Geotextile Tubes and Their Application to Dewatering
… technology offering speed, efficiency, and minimal impact to the environment for dewatering of sediment or sludge from dredging operations. Common applications include: removal of solids from municipal water and waste water treatment, agricultural remediation, marine dredging operations, …
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The Seasonality and Climate Predictability of the Frequency of Extreme Flood Events Across the Contiguous United States
… flood events across the United States (US) and outlines the impact of large-scale climate on its spatio-temporal variability. The analysis was conducted on 317 stream gages from the United States Geological Survey (USGS) Hydro-Climatic Data Network (HDCN) over a period of 68 years …
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A Comparison of the Army Corps of Engineers Hydrologic Modeling System and Autodesk Storm and Sanitary Analysis for Hydraulic and Hydrologic Analysis and Design
<p>Hydrological and hydraulic effects of urban development is one of the key issues of study for improved water management. The addition of impervious surfaces to once pervious land and re-routing open channels and flow paths can cause flooding or declining water levels within a watershed. Many …
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Potential Wave Impacts On Shorelines In Intertidal Waterways
… acting on the shoreline are tidal currents and waves generated by winds and passing vessels. This study focuses on the analysis of vessel-generated waves and their possible effects on different shoreline types. The experiment conducted herein examines variations in turbidity related to …
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Quantitative and Qualitative Error Re-analysis of Tidal Datasets
<p>Tidal data forms the basis for understanding and quantifying sea-level rise and tidal statistics. While quality assurance methods based upon spectral and harmonic analysis have been applied to individual tidal records, these methods have not been used to assess global tidal datasets. In this …
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Evaluation of Snow and Streamflow in the National Water Model with Analysis using Machine Learning
<p>Snow has great influence on land-atmosphere interactions and snowmelt from the mountains is a vital water source for downstream communities dependent on snow fed lakes, rivers and streams. This study explored the snow and streamflow prediction capabilities of process-based numerical prediction …
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Lap Splice Development Length of Rebar in Stabilized Hollow Interlocking Compressed Earth Blocks
… block press is currently manufactured in Thailand under the guidance and direction of the Center of Vocational Building Technologies (CVBT). All ICEB units and grout constructed for this research were created from mix proportions of soil, sand, cement, and water. Rebar bar sizes were restricted …
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Laboratory Investigation of the Effects of Temperature and Moisture on Interface Shear Strength of Textured Geomembrane and Geosynthetic Clay Liner
… to determine the effects of temperature and moisture on the shear strength of textured geomembrane (T-GM) and geosynthetic clay liner (GCL) interface. Several landfill slope failures involving geosynthetics have occurred within the past three decades. Interface shear strength of T-GM/GCL …
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Full-Scale Shake Table Cyclic Simple Shear Testing of Liquefiable Soil
… table tests to investigate liquefaction of sandy soils. Consideration of the potential and consequences of liquefaction is critical to the performance of any structure built in locations of high seismicity underlain by saturated granular materials as it is the leading cause of damage …
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