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.
Results
Showing 1 to 20 of 48 for “"hydraulic parameters"”.
-
A comparison of electric and hydraulic approaches to fluid flow simulation and hydraulic parameters inversion
… and error process of altering various reservoir parameters and simulating the pressure distribution and field production, or what is known as 'Forward Modeling'. In this study, I propose the use of regular electrical arrays to simulate aquifer drawdowns. By representing reservoir hydraulic …
-
Variability of physical, chemical and hydraulic parameters in soils of Mt. Kilimanjaro across different land uses
… of various soil physical, chemical and hydraulic properties in different land uses at Mt. Kilimanjaro and its implications for carbon and water storage of the soils. The objectives were to apply visible to near infrared diffuse reflectance spectroscopy in-situ to gain information about …
-
The combined effects of fertilization and relative water limitation on tissue water relations, hydraulic parameters and shallow root distribution in loblolly pine (Pinus taeda L.)
… in changes to shoot tissue water relations parameters classically characterized in drought response studies. More severe water limitation was necessary to elicit responses, and those responses had not been fully described previously. The more severe water limitation resulted in increased …
-
Downstream change in channel hydraulics along the River Severn, UK
… understanding of the longstream distribution of hydraulic processes is important for evaluating the mechanisms which control the catchment-scale variation of channel stability, sediment transport and siltation, flood generation and aquatic habitats. However, little attention has been given to …
-
ΥΔΡΟΓΕΩΛΟΓΙΚΗ ΕΡΕΥΝΑ ΥΠΟΛΕΚΑΝΗΣ ΚΑΛΑΜΠΑΚΑΣ (ΔΥΤ. ΘΕΣΣΑΛΙΑ)
… AREA AND THE GROUND-WATER REGIME AS WELL. THE HYDRAULIC PARAMETERS OF THE AQUIFERS WERE EXPERIMENTALLY DETERMINED THROUGH PUMPING-TESTS AND THEGROUNDWATER RESERVES WERE ASSESSED. THE HYDROCHEMICAL CHARACTER OF GROUNDWATER WAS STUDIED IN RELATION TO ITS SUITABILITY FOR DIFFERENT USES. FINALLY, …
-
Characterization of Subsurface Heterogeneity Using Transient Hydraulic and Tracer Tomography
Transient hydraulic tomography (THT) is a cost-effective technique for characterizing the heterogeneity of hydraulic parameters in the subsurface. In this study we developed an efficient sequential successive linear estimator (SSLE) for interpreting head data from transient hydraulic tomography to …
-
Integrated Numerical Modeling of Spatial and Time-Variant Hydrologic Response in Subsurface Drained Watersheds
… predictions with accurate descriptions of soil hydraulic properties, climatic data and drainage parameters. Simulated results at the field scale also indicated that the subsurface model was highly sensitive to estimates of evapotranspiration during the summer. Hydraulic parameters obtained from …
-
Some contributions to the hydraulic characterization of fractured bedrock formations
… monitoring, groundwater sampling, formation hydraulic testing, and the conceptual model of formation hydraulics. This dissertation presents a field device, two hydraulic test methods, and one method of hydraulic test analysis developed to assist in the hydraulic characterization of fractured …
-
The use of corn pollen and glass beads to estimate fine particulate organic matter retention
… a fraction of the still water fall velocity. Hydraulic parameters indicate that flow conditions at the stream bed prevent establishment of a laminar sublayer. As a result, corn pollen and glass beads should be entrained and moved as bed- or suspended load. Gradient was the single best stream …
-
Coupled transport in natural porous media
… with the model's sensitivity to a change in hydraulic parameters. Water vapor and solute transport had no effect on the simulation result but transport of liquid water proved to be an important heat transfer process near 0 °C. The impact of the chosen parameterization and model on the …
-
An evaluation of unsaturated flow models in an arid climate
… model input, procedures for converting hydraulic parameters for each model were explored. In addition, the compilation of atmospheric data collected at the site became a useful tool for developing predictive functions for future studies. The final model results were used to evaluate the …
-
Evaluation and improvement of CERES-Maize evapotranspiration simulations under full and limited irrigation treatments in northern Colorado
… analysis was performed on genotype and soil hydraulic parameters in addition to radiation use efficiency, using full and limited irrigation treatments and two global sensitivity analysis methods (Morris and Sobol'). Outputs evaluated included phenological stages, leaf growth, leaf area index, …
-
Scale formation, properties and de-scaling in steelmaking
… The effect of steel composition and operating parameters on scale formation and scale removal efficiencies were investigated. Experimental investigations were carried out using a thermogravimetric (TGA) apparatus designed to replicate the combustion gas atmosphere and temperature in actual …
-
Water quality prediction for recreational use of Kranji Reservoir, Singapore
… The model was constructed by specifying basic hydraulic parameters. E. coli loadings were indexed to the various land uses within the Kranji Catchment and the effective E. coli bacterial decay rates were derived from theoretical equations and verified by on-site attenuation studies carried out …
-
Cosmic-ray neutron sensing for soil moisture measurements in cropped fields
… 40 cm). The direct transfer of CRS calibration parameters between two vegetation periods led to a large overestimation of soil moisture by the CRS. Part of this soil moisture overestimation was attributed to an underestimation of the CRS observation depth during the corn period ( 5-10 cm), which …
-
ΥΔΡΟΓΕΩΛΟΓΙΚΕΣ ΣΥΝΘΗΚΕΣ ΝΟΤΙΟΥ ΛΙΓΝΙΤΟΦΟΡΟΥ ΠΕΔΙΟΥ ΠΤΟΛΕΜΑΙΔΑΣ. ΠΡΟΒΛΗΜΑΤΑ ΥΠΟΓΕΙΩΝ ΝΕΡΩΝ ΚΑΙ ΑΝΤΙΜΕΤΩΠΙΣΗ ΤΟΥΣ ΚΑΤΑ ΤΗΝ ΕΚΜΕΤΑΛΛΕΥΣΗ
… THE GEOLOGY OF THE AREA IS STUDIED, THE VARIOUS PARAMETERS OF THE HYDROLOGIC BUDGET ARE ESTIMATED, THE GROUNDWATER QUALITY IN RELATION TO THE HYDROGEOLOGICAL CONDITIONS IN THE BASIN ARE INVESTIGATEDAND THE VALUES OF THE BASIC HYDRAULIC PARAMETERS OF THE FIELD ARE ESTIMATED. IN THE LAST CHAPTER A …
-
The Distribution of Macroinvertebrates Along the Impounded Middle Chattahoochee River
… able to survive only within a distinct range of hydraulic parameters, including discharge, velocity, and surface elevation. While disturbances in the macroinvertebrate fauna may be observed downstream of a reservoir, effects of a cumulative system of reservoirs may result in perturbations that …
-
The effectiveness of certain sustainable urban drainage systems in controlling flooding and pollution from urban runoff
… quality data were collected at each site. Key hydraulic parameters examined include percentage runoff, initial runoff loss, peak flow reduction and lag time. The term Benefit Factor has been introduced as a volumetric measure used to summarise the hydraulic benefit gained by installing SUDS, as …
-
LAKEMAGING: GEOPHYSICAL DATA INTEGRATION FOR GROUNDWATER MODELLING
… is commonly derived from sparse boreholes, local hydraulic tests, and indirect observations that do not adequately describe subsurface heterogeneity. In this context, geophysical methods, and especially electrical and electromagnetic techniques, provide spatially continuous information that can …
-
On Single Well Forced Gradient Tracer Tests: Implications of Aquifer Physical Heterogeneity and Tracer Behaviour
… in situ aquifer contaminant fate and transport parameters for use in natural attenuation assessments and remediation schemes. To date dipole flow tracer tests have been used to measure the conservative and hydraulic parameters of an aquifer, while push-pull tests are well characterised for use …
Page 1 of 3