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 226 for “"water surface"”.
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Laboratory scale experiments with water surface waves
… at large and small scale, for the study of surface gravity waves. A number of measurement techniques are developed and implemented to capture space and time evolution of waves on a water surface in gravity, gravity-capillary and capillary ranges with the purpose to study the statistics of …
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Water surface platform for internet-based environmental monitoring system
… out to monitor the environment of air and water quality that displayed the data through the mobile phone or computer. This is due to several challenges while monitoring the environment such as accessibility to a site and the safety of the workers. This research work consists of several …
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Ground water-surface water interaction of Rio Grande Biopark area, Albuquerque, New Mexico
Ground water and surface water are typically considered as separate entities, but all surface water features interact with ground water in different ways. Better understanding of ground water-surface water interaction is important for effective land and water management. This study investigated the …
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Water surface profiles in side channel spillways : comparisons between computed and experimental values
This thesis is an investigation into the water surface profiles found in side channel spillways. The classical method proposed by Hinds is investigated, with specific reference to the water surface slope equation. A literature review is given on the evolution of the theory, from the conceptual …
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Ground water - surface water interactions in the lower Virgin River area, Arizona and Nevada
This study assessed interactions between ground water and surface water in the lower Virgin River, Arizona and Nevada, using stable isotopes and major ions as environmental tracers. The study reach starts at the Virgin River Gorge in Arizona and terminates at Lake Mead in Nevada, 80 km downstream. …
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The Relationship Between Atmospheric Circulation Patterns And Water Surface Elevation In Devils Lake, North Dakota: 1965-2010
… lacks an outlet until the lake level reaches a water surface elevation (WSE) of 1,458 ft asl (444.4 m). Lake levels have fluctuated continuously since the last glaciation, in response to natural climatic variations. The lake has risen steadily since 1993, severely affecting the infrastructure …
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Using Free Water Surface Constructed Wetland for the Mitigation of High PH Secondary Effluent From Municipal Wastewater Treatment Plant
Wastewater stabilization ponds (WSPs) are considered to be the most sustainable technology for small, rural and remote communities in North America. However, due to the configuration of WSPs and limited control over these systems, performance concerns during certain parts of the year may arise, as …
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Underwater sound radiation from single large raindrops at terminal velocity: the effects of a sloped water surface at impact
… terminal velocity raindrops striking a smooth water surface create oscillating bubbles that radiate significant underwater sound energy. Those studies identified two diameter ranges that produce bubbles: small drops (.8-1.1 mm diameter) which produce bubbles by one mechanism and large drops …
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Availabilty of Potential Invertebrate Foods for Anatini Ducklings Above and Below the Water Surface of Eastern South Dakota Wetlands
… was no apparent association between aquatic and surface invertebrate abundance (r=0.022, P=0.197) or volume (r=0.003, P=0.655). Similar results were found for aquatic and surface invertebrate abundance (r2=0. P=0.995) and volume (r=0.001, P=0.850) in 1999. Mean aquatic and aerial invertebrate …
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A Framework for Standardized Monitoring of Antibiotic Resistance in Aquatic Environments and Application to Wastewater, Recycled Water, Surface Water, and Private Wells
… in two independent laboratories on a set of six water matrices: wastewater, recycled water, and surface water from six different wastewater utilities engaging in water reuse located in five states across the USA. The impact of wastewater treatment and advanced water treatment processes was …
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Locomotion of Skittering Frogs at the Air-water Interface
Many animals interact with the air-water interface during locomotion. Such location either involves moving through the water's surface or moving atop the water surface. This dissertation aims to investigate both of these forms of locomotion in frogs. First we quantified the kinematics of …
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Numerical Simulations and Studies on Round Jet Impingement, Twin Jet Impingement and Helicopter Rotor Blades Ground Effect
… The convention air jet impingement on ground surface was compared to air jet impingement on water surface in the range of Mach number from 0 to 0.3. Currently the studies on round jet impingement on water surface are very few. The goal of this research is to study the difference of …
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A new technique for 3D modeling of water surfaces using a Geiger mode receiver
… and quickly (i.e in real time) create a digital surface model of a water surface using bathymetric lidar when presented with water turbidity. Accurate and consistent modeling of the water surface is required in order to correct for the surface’s volatility when imaging the sea floor. However, …
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Aperture: An architecture to amplify aspects of competitive swimming
… be on the motion of swimming below and above the surface of the water. Below the water surface, the approaching swimmer and the moment of the turn will be framed. Above the water surface, two apertures penetrate the roof above the pool. One directs sightlines to moment of a race's start, while the …
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Hydraulic Modeling of a River Network for Predicting Flood Inundation using HEC-RAS and GIS Models - A Case Study in Southern Virginia
A flood inundation study is presented for a watershed located in south central Virginia. A HEC-RAS hydrodynamic model of the main river network was developed to assess the impact of a number of hydrologic events, including the Probable Maximum Flood (PMF), in the area of interest. The primary goal …
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An Evaluation of Three Techniques for the Quantitative Sampling of Marsh Invertebrates
… sampling the invertebrate standing crop on the water surface of dense cattail (Typha latifolia) marshes at 19 sites around the periphery of Caliche Lake in Grant County, Washington.
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Modeling riparian groundwater depth as a function of river flow for the Rio Grande at Albuquerque, NM
… streamflows in semi-arid regions, riparian groundwater will be similarly reduced, impacting native and non-native flora. This paper presents a geographic information system (GIS) based approach for creating comprehensive riparian water surfaces from point surface water and groundwater …
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Mechanisms governing avulsions in transient landscapes : analysis of the May 2006 Suncook River avulsion in Epsom, New Hampshire
… an avulsion by preventing incision and driving water overbank. Easily erodible substrates in the path of the new channel can also contribute to avulsions by allowing a knickpoint to migrate quickly upstream and create a channel with a more favorable slope during a single flood. Based on …
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Temporal Frame Difference Using Averaging Filter for Maritime Surveillance
… moving of waves, sun reflection over the sea surface, rapid change in lightning due to the sun reflection over the water surface, movement of clouds and presence of moving objects such as airplanes or birds, makes the maritime environment very challenging. In this work, we propose a method for …
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