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 272 for “"water level"”.
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Augmented Reality Water-Level Task
The``Water Level Task'' asks participants to draw the water level in a tilted container. Studies showed that many adults have difficulty with the task. Our study aimed to determine if the misconception about water orientation happens in a more natural environment. We implemented an AR …
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Male and female differences in the comprehension of Piaget's water level concept
… male and female performance on the horizontal water level task. A sample of 18 boys and 17 girls who were in elementary school were selected. The Chi-square test of significance was used where variables and factors were statistically examined. Five factors were considered in relation to the …
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Estimating Transmissivity From the Water Level Fluctuations of a Sinusoidally Forced Well
… the known values of T, even when modest levels of noise were included. For the field data, the amplitude and damping ratios were determined, and transmissivity was estimated. These data were also analyzed with the frequency domain approach of Rojstaczer (1988). The estimates of T …
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Social impact assessment of changing the water level in the Olushandja Dam
… 1975. It acts as a storage and balancing dam for water supplied from Calueque. Olushandja dam is 17, 7kms long and about 300m wide. For the last 20 years it has been managed at 30% as this is the capacity at which evaporation balances injection of water into the dam and seepage. As part of a plan …
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Wind-Driven Sea Surface Wave and Coastal Water Level Dynamics Across Different Spatial Scales
… surface waves, including wind, topography, and water levels, must be incorporated into numerical models to achieve accurate simulations of the wave climate. Predictions of the offshore surface wave conditions can inform projections of nearshore impacts in response to storms or sea level rise, …
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Water level monitoring and controlling of water treatment plants using wireless sensors in LabVIEW
… of combining monitoring and controlling of the water level in the distribution tanks of water treatment plants by using wireless sensors network. The design and developed prototype of remote monitoring and controlling system of water levels in various tanks can be used in different parts of the …
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Performance, denitrification activity, and microbial community dynamics of denitrifying biofilters under fluctuating water level
… is a significant source of nitrogen to coastal water bodies, causing water quality degradation. Denitrifying biofilters have been identified as a technology that reduces the export of nitrate from tile-drained fields. A better understanding of the microbial communities that allow the biofilter …
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Mimicking Nature: How water level management on a large reservoir affects walleye (Sander vitreus) spawning habitat
… border, has been successively managed under two water-level management policies (‘rule curves’) in recent decades. To compare the effects of the rule curves on walleye spawning, I modeled wave energy, ice scour, and habitat availability at 44 spawning locations. Wave energy increased (18% for …
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Water Level Quantiles Of Devils Lake Under Down-Scaled Gcm Predictions Using A Coupled Hydro-Climatic Model
… lake. Future hydrology of the basin and lake levels of Devils Lake are simulated using the weather samples obtained from several downscaled GCM runs under varying scenarios due to anthropogenic modifications and the resulting composition of the atmosphere. 100 traces of future water levels of …
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Coastal water level prediction: a comparative study of statistical and machine learning techniques for time series forecasting
… The application of these tools to coastal water level forecasting generates insightful predictions for operational use in flood management, as well as a deeper understanding of the influencing factors. Many existing models and projects focus on long-term trends in coastal water levels …
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Common cyclicities in seismicity and water level fluctuations at the Charlevoix seismic zone of the St. Lawrence River
… hydraulic head, caused by transient increases in water table elevation, can be transmitted to hypocentral depths (10-25 km) in a fractured, prestressed, near-failure crust, and along with long term hydrolitic weakening of rocks, contribute to the triggering of earthquakes. In this study, the …
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Hardware-in-the-loop simulation of pressurized water reactor steam-generator water-level control, designed for use within physically distributed testing environments
… digital sensing and control of steam generator water-level. The model was created with an intention to serve as a component within a larger, distributed digital systems conceptual testing facility. In the present application, a software model simulates a nuclear pressurized water reactor core, …
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The effects of land use, temperature and water level fluctuations on the emission of nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4) from organic soil cores in Iceland
… gain insight into the influence of temperature, water level and water level fluctuations on the GHG emission of soils representing the three major types of landuse in Iceland: undisturbed peatland, drained uncultivated peatland and hayfield on drained peatland. Twenty-four soil cores, from three …
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Ground water reservoir response to earth tides
… for the computation of poresity from tidal water level measurement is presented. Tidal water level fluctuations in three artesian wells of southwest Virginia were recorded, digitized and harmonically analysed. Corrections for non tidal water level fluctuations and barometric pressure effects …
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ΒΙΟΛΟΓΙΑ ΚΑΙ ΟΙΚΟΛΟΓΙΚΗ ΣΥΜΠΕΡΙΦΟΡΑ ΤΟΥ ΛΕΥΚΟΤΣΙΚΝΙΑ (EGRETTA GARZETTA) ΣΤΗΝ ΤΕΧΝΗΤΗ ΛΙΜΝΗ ΚΕΡΚΙΝΗΣ ΣΕΡΡΩΝ
… ACCORDING TO THE SEASONAL FLUCTUATION OF THE WATER LEVEL DURING THE CRUCIALTIME OF BREEDING. THE SEASONAL FLUCTUATION OF THE WATER LEVEL THE LAKE, AFFECTS POSSITIVELY THE FORAGING OF THE SPECIES (VARIOUS FEEDING SITES OR CREATED ANDNEGATIVELY THE BREEDING (LOSSES OF EGGS AND CHICKS DUE TO …
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Analysis of water volume change of the lakes and reservoirs in the Mississippi River basin using Landsat imagery and satellite altimetry
In recent years, the demand for freshwater has been steadily increasing owing to population growth and economic expansion. Surface waters such as lakes and reservoirs function as a dominant factor in mankind's freshwater provision. Analysis of changes in their water storage is consequently vital …
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SENSITIVITY ANALYSIS OF WATER LEVELS AND WAVES IN THE CARMEL RIVER STATE BEACH TO CHANGING BOUNDARY AND MORPHOLOGICAL CONDITIONS IN DELFT3D: CARMEL RIVER LAGOON
… tidal energy had a larger impact on the lagoon water level and conversely, when river discharge is maximized, despite the wave height, river discharge dominates the processes affecting water level in the lagoon. Both increased discharge and increased wave heights increased the mean water level …
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A method using drawdown derivatives to estimate aquifer properties near active groundwater production well fields
… due to high drilling costs. In these settings, water levels from groundwater production wells offer a transient dataset that can be used to estimate aquifer properties. Well interference effects, if detectable at neighboring production wells, allow for an interrogated aquifer volume that is …
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Storage effects: the relationship between the hydrological dynamics of small infield pools and plant functional groups
… and precipitation and an observed daily water level time series. Further, I developed transfer function to describe mean drying up frequencies and mean spring high water level out of short time measurements. The results show a decrease in the minimum water level and an increase in the …
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