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Dissertations / Theses on the topic 'Hydrology Hydraulics'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Price, David A. "An integrated approach to modelling floodplain hydraulics, hydrology and nitrate chemistry." Thesis, University of Bristol, 1997. http://hdl.handle.net/1983/8d5b1834-86e7-4010-9933-06b3e73cec69.

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As part of the effort to satisfy the ever increasing demand for a greater understanding of fluvial, hydrological, chemical, sedimentological and geomorphological processes operating on the floodplain, mathematical simulation models have come to play a significant role in the understanding, prediction and management of the floodplain environment. Underlying the accurate numerical representation of hydraulically driven processes is the provision of a suitable floodplain hydrology model which accounts for the interaction between surface hydraulics and subsurface hydrology. Such a numerical repres

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2

Gallup, Douglas J. "Floodplain and Flood Probability Mapping Using Geodatabases." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd736.pdf.

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3

O'Connor, Jim E. "Hydrology, hydraulics, and sediment transport of pleistocene Lake Bonneville flooding on the Snake River, Idaho." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/191159.

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Approximately 14,500 years ago, Pleistocene Lake Bonneville discharged 4750 km 3 of water over the divide between the closed Bonneville Basin and the watershed of the Snake River. The resulting flood, emanating from the divide at Red Rock Pass, Idaho, followed the present courses of Marsh Creek, the Portneuf River, and the Snake and Columbia Rivers before reaching the Pacific Ocean. For the 1100 kilometers between Red Rock Pass and Lewiston, Idaho, the Bonneville Flood left a spectacular array of flood features that have allowed for geologic reconstruction and quantitative evaluation of many a

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4

Fabris, Luca. "Influence of hydrology, hydraulics and temperature on Atlantic salmon habitat : modelling-based approaches for sustainable river management." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=239262.

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In this thesis, we improved our understanding of the effects of hydrology, stream hydraulics, and temperature on juvenile Atlantic salmon (Salmo salar L.) habitat. We demonstrated the key role played by stream morphology and flow regime on in-channel hydraulics and consequently on salmonid habitat. Additionally, we showed how riparian afforestation has potential to moderate climate change effects on stream temperature preserving freshwater ecosystems. The Girnock Burn is an upland Scottish river that has been intensively studied to investigate flow generation processes and stream temperature,

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5

Shaw, Catherine. "The influence of hydraulics on benthic macroinvertebrates in the confluence of Wood Brook and Burleigh Brook, Loughborough, UK." Thesis, Loughborough University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250954.

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6

Ruggeri, Francesca. "Engineering the Byzantine water supply of Constantinople : mapping, hydrology and hydraulics of the long aqueducts outside the city." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31521.

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The Water Supply of Byzantine Constantinople is one of the most outstanding achievements of hydraulic engineering from the Roman world. Working entirely as a gravity-fed system, this infrastructure relied on hundreds of kilometres of masonry channels, winding along the hills of Turkish Thrace and carrying water to Constantinople across different watersheds. The Water Supply was built in two main phases: the first in the mid-fourth century, following the foundation of Constantinople in 330 AD; and the second in the early fifth century. It is not clear whether the aqueducts from these two phases

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7

Plitzuweit, Samuel J. "Effects of Channel Network Geometries on Incision Processes and Channel Hydraulics in Bedrock Streams." Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1243871371.

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8

Buono, Jared. "Assessing the Ecohydrologic Consequences of Woody Plant Encroachment." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195347.

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This three part study attempted to enhance our understanding of vegetation change and its potential effects on ecohydrology in drylands. The first study developed a method to measure the velocity of shallow overland flow. Under rainfall simulation, dye tracers were applied to runoff and photographed to calculate mean surface velocity. Results showed this approach was a significant improvement explaining 13% more of the variation in mean velocity compared to traditional methods. Results from the first study were used to compare hydraulic parameters on shrub- and grass-dominated plots in the se

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9

Aguilar, Marcus F. "Regulatory and Economic Consequences of Empirical Uncertainty for Urban Stormwater Management." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/82726.

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The responsibility for mitigation of the ecological effects of urban stormwater runoff has been delegated to local government authorities through the Clean Water Act's National Pollutant Discharge Elimination Systems' Stormwater (NPDES SW), and Total Maximum Daily Load (TMDL) programs. These programs require that regulated entities reduce the discharge of pollutants from their storm drain systems to the "maximum extent practicable" (MEP), using a combination of structural and non-structural stormwater treatment — known as stormwater control measures (SCMs). The MEP regulatory paradigm acknow

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10

Smemoe, Christopher M. "Floodplain Risk Analysis Using Flood Probability and Annual Exceedance Probability Maps." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd379.pdf.

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11

Payn, Robert Alden. "The Geomorphic Influence of Agricultural Land Use on Stream Hydraulics and Biological Function." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/33913.

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<p>Agricultural land use near streams frequently results in long-term disturbance to woody riparian vegetation and an alteration of reach scale geomorphic structure. Such disturbances often result in increased fine sediment input to the stream along with direct changes in channel structure. The study described here was designed to quantify stream geomorphic changes associated with agriculture and their influence on reach scale transient storage hydraulics and sediment biological function. Six small streams in the Appalachian Mountains of western North Carolina were selected to compare 3 rea

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12

Misset, Clément. "The role of riverbed on suspended sediment transport dynamics in Alpine Catchments." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAU020/document.

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Les grandes quantités de sédiments transportés par suspension dans les rivières alpines sont associées à d’importantes problématiques socio-économiques et environnementales telles que le transport de polluants, la dégradation des milieux aquatiques ou l’envasement des retenues hydroélectriques. Pour faire face à ces enjeux, il est nécessaire de mieux comprendre le rôle joué par le lit des rivières alpines sur la dynamique de ce transport. A partir de larges bases de données issues de la littérature et de nouvelles mesures de terrain, la première partie de cette thèse propose une étude à une éc

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13

Paxton, Bruce Randall. "The influence of hydraulics, hydrology and temperature on the distribution, habitat use and recruitment of threatened cyprinids in a Western Cape river, South Africa." Doctoral thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/11402.

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Includes abstract.<br>Includes bibliographical references (p. 149-171).<br>This study aims to explore the relationships between river flow and fish ecology in the context of the riverscape model of river ecosystems by examining the seasonal distribution of two endangered fish species, i.e. the Clanwilliam yellowfish and Clanwilliam sawfin, in relation to their physical (structural) and hydraulic habitat requirements at several scales, and to assess the importance temporal changes in flow and temperature in relation to the timing of key life history events and recruitment. From these findings i

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14

Cadwallender, Mary Virginia. "Comparative Landscape Infrastructure in Kolda, Senegal and Washington, D.C." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78321.

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This comparative study of two urban areas—Kolda, Senegal and the Historic Anacostia Neighborhood in Washington, D.C.—explores how landscape infrastructure can decrease the scalar disconnect between the global water crisis and local water use practices. By looking at one city in the Global North and one in the Global South with similar risk of water stress, I am able to compare cultural aesthetics and engage two different levels of infrastructural build out (World Resources Institute, Water Risk Atlas). The design approach draws inspiration from Lawrence Halprin's notion of "experiential equiv

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15

Postila, H. (Heini). "Peat extraction runoff water purification in treatment wetlands constructed on drained peatlands in a cold climate." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526212258.

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Abstract Best available technology (BAT) should be used for peat extraction runoff purification. One currently used BAT technique is treatment wetland construction on pristine peatland, but under Finnish national strategies, new peat extraction areas should only be established on previously drained peatland and it can be challenging to find natural, intact peatland for treatment wetlands near these areas. This thesis evaluated the function and purification efficiency of treatment wetlands constructed on drained peatland and examined factors that could indicate their purification efficiency. Th

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16

Ojeda-Bustamante, Waldo 1961. "Determination of Hydraulic Properties With Point Source Experiments." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/191195.

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A finite-element model was developed to simulate the water flow underneath a surface point source using the Galerkin method of weighted residuals and the mixed formulation of the Richards' equation. The saturated radius usually formed during a point source test was estimated by the numerical model. Comparisons with published experimental and analytical results indicated that the model is accurate and reliable. The numerical model aids in understanding the water regime under different point source scenarios. The finite element model was coded in C++ by using an object oriented approach. This al

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17

Hartz, Andrew Scott. "Lab Scale Hydraulic Parameter Estimation." Thesis, The University of Arizona, 2011. http://hdl.handle.net/10150/203499.

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Hydraulic tomography has been tested at the field scale, lab scale and in synthetic experiments. Recently Illman and Berg have conducted studies at the lab scale. Using their data hydraulic tomography can be compared to homogeneous anisotropic solutions using one pumping well or multiple pumping wells. It has been found that hydraulic tomography out performs homogenous methods at predicting hydraulic head for validation pumping experiments. Also it has been shown in this study that homogenous anisotropic tests exhibit scenario dependent behavior. Additional tests performed to further vali

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18

Bishop, Carolyn Wagoner 1947. "Hydraulic properties of vesicular basalt." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/291554.

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Laboratory experiments were conducted on vesicular basalt cores to estimate hydraulic properties. Properties included dry bulk density, effective porosity, skeletal density, saturated hydraulic conductivity and determination of moisture characteristic curves. Unsaturated hydraulic properties estimated included hydraulic conductivity and diffusivity as a function of matrix suction. Infiltration tests were run on a larger block of the same basalt. Infiltration curves were developed and saturated hydraulic conductivity estimated.

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19

Choi, Chi Chi. "Coupled Hydrologic And Hydraulic Models And Applications." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/4955.

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20

Lorentzon, Martin. "Grundvattenmodellering i Badelundaåsen." Thesis, Uppsala University, Department of Earth Sciences, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88903.

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<p>Over an extended period of time there have been plans to establish a shared facility in Lennheden to extract groundwater from the Badelunda esker to provide drinking water for the cities of Borlänge and Falun. The city of Falun is dissatisfied with the quality of its drinking water and the city of Borlänge is concerned about the risk of contamination of its existing groundwater supply at its current location. To provide a basis for a decision on this issue, the company Midvatten AB has been commissioned to perform hydrogeological investigations in the area of Lennheden.</p><p>The purpose of

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21

Shelters, Alexandra. "Paradoxical Behavior in Groundwater Levels in Response to Precipitation Events." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright156754517986892.

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22

Ng, Karen Pei-Tak. "Two-dimensional hydraulic-habitat modeling of a rehabilitated river." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99003.

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The application of a 2D hydraulic-habitat model, River2D, to simulate flows and fish habitat areas in a reach of the Nicolet River (Quebec, Canada) containing two sets of double-wing rock current deflectors to enhance fish habitat was examined. Depth-averaged velocity in the reach was determined using one or two measurement points in the vertical under the assumption that the profile was logarithmic; however, the presence of boulders and obstructions disturbed the profile, making it difficult to characterize using only two measurement points. The sensitivity of the simulation results to roughn

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23

Wang, Cheng. "AN INTEGRATED HYDROLOGY/HYDRAULIC AND WATER QUALITY MODEL FOR WATERSHED-SCALE SIMULATIONS." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2529.

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This dissertation presents the design of an integrated watershed model, WASH123D version 3.0, a first principle, physics-based watershed-scale model of integrated hydrology/hydraulics and water quality transport. This numerical model is comprised of three modules: (1) a one-dimensional (1-D) simulation module that is capable of simulating separated and coupled fluid flow, sediment transport and reaction-based water quality transport in river/stream/canal networks and through control structures; (2) a two-dimensional (2-D) simulation module, capable of simulating separated and coupled fluid flo

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24

Åberg, Isabelle. "Flood Mapping: Assessing the uncertainty associated with flood inundation modelling. A case study of the Mora River, Sweden." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-315687.

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Expansion of cities and major infrastructure projects lead to changes in land use and river flows. The probability of flooding is expected to increase in the future as a result of these changes in combination with climate change. Hydraulic models can be used to obtain simulated water levels to investigate the risk of flooding and identify areas that might potentially be flooded due to climate change. Since a model is a simplification of the reality it is important to be aware of a model’s uncertainties. A part of this study is therefore aimed to perform a sensitivity analysis to determine whic

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25

Åkesson, Anna. "Hydraulic- hydromorphologic analysis as an aid for improving peak flow predictions." Licentiate thesis, KTH, Vattendragsteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-25425.

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Conventional hydrological compartmental models have been shown to exhibit a high degree of uncertainty for predictions of peak flows, such as the design floods for design of hydropower infrastructure. One reason for these uncertainties is that conventional models are parameterised using statistical methods based on how catchments have responded in the past. Because the rare occurrence of peak flows, these are underrepresented during the periods used for calibration. This implies that the model has to be extrapolated beyond the discharge intervals where it has been calibrated. In this thesis, h

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26

Kartezhnikova, Maria. "Hydraulic impacts of hydrokinetic energy extraction in rivers." Thesis, University of Alaska Anchorage, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1550170.

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<p> A simple technique to estimate the hydraulic impacts associated with the deployment of hydrokinetic (HK) devices is introduced. This technique involves representing HK devices with an enhanced bottom roughness. The enhanced bottom roughness is found to be a function of Manning roughness, slope, and water depth of the natural channel as well as device efficiency, blockage ratio, and density of device deployment. This approach was developed using a theoretical relationship between power extracted to power dissipated, and assuming a simple rectangular channel cross-section and uniform dist

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27

Myrland, Johanna. "Two-dimensional hydraulic modeling for flood assessment of the Rio Rocha, Cochabamba, Bolivia." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229921.

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Historically humans have settled in river valleys, which has made flooding a natural hazard for human communities. This is also the situation in the valley of Cochabamba, which is frequently affected by floods. Therefore it is of high relevance to assess and manage the flood risk in order to reduce the impact in the affected areas. For this purpose hydraulic simulations were performed with the two-dimensional model Iber. The study area includes 17 kilometers of the main river, Rio Rocha, and its tributaries. The data used in the project was elevation data of high resolution and computed hydrog

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28

Paice, Colin. "Hydraulic control of river bank erosion : an environmental approach." Thesis, University of East Anglia, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254514.

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29

Keller, John Edward. "Accurate Cylindrical-Coordinate Numerical Models For The Analysis Of Hydrologic Tests." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/dissertations/57.

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Analytical solutions to well hydraulic problems have restrictive assumptions that often do not match real world conditions. Although numerical models more closely match reality, they either ran too slowly to be practical or lacked accuracy because of coarse grid spacing and large time steps. Advances in computer power over the last few decades now allow for accurate, fast numerical models that handle complex flow systems. The purpose of this dissertation was to develop flexible and accurate numerical modeling codes for the simulation of hydrologic tests. One of these numerical modeling cod

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30

Boulineau, Sheryl Taillon. "East Lake Meadows : hydrologic strategies for architecture." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/23366.

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31

Luffman, Ingrid Elizabeth. "The effect of spatial statistics of hydraulic conductivity and distribution coefficient fields on solute transport." Thesis, University of Ottawa (Canada), 1997. http://hdl.handle.net/10393/4458.

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The purpose of this research is twofold. First, a tool is developed to assist in the reproduction of field correlation scenarios for input into a flow and transport simulator. Second, this tool is used to generate random fields with several different velocity/retardation relationships typical of the Canada Forces Base Borden aquifer in order to determine the effect of this relationship on the retardation and dispersive processes, specifically on the macrodispersivity. The second section of the research investigates the effect of different types of spatial statistics on the behaviour of a conta

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32

Higginson, Noel Nelson John. "Evaluation of hydraulic resistance in single and two-stage rivers." Thesis, Queen's University Belfast, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317469.

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33

Stewart, Dave. "Development of Basin Factor Methodology for the Pima County Hydrology Procedures." Thesis, The University of Arizona, 2008. http://hdl.handle.net/10150/193328.

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The basin factor is a hydrologic parameter that represents the overall impedance to flow of a watershed in the PC-Hydro peak discharge model for small ( < 10 mi2) semi-arid watersheds in Pima County, Arizona. To improve peak discharge estimates and provide validation of the basin factor as a physically-based parameter, basin factor values were "back-calculated" for return period and observed events on six undeveloped rangeland watersheds and correlated with Manning's n roughness coefficients, rainfall intensities, and hydraulic radii. Observed basin factor values displayed a positive trend wit

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34

Hussen, Akif Ali 1957. "Measurement of Unsaturated Hydraulic Conductivity in the Field." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/191170.

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Unsaturated hydraulic conductivity was measured using four different methods. Tension permeameters were used to measure unsaturated hydraulic conductivity in the field, using a single disc method, which depends on the measurements of sorptivity, steady state flow rate, initial and final water content (White and Perroux, 1987, 1989). Also, a double disc method was used which utilizes Wooding's (1968) equation for two different disc radii at the same tension for steady state flow rates. Undisturbed and disturbed soil cores were used to measure unsaturated hydraulic conductivity in the lab, using

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35

Ryan, Chris J. "Development of GIS techniques for automated topographic and hydrologic analysis." School of Civil, Mining & Environmental Engineering - Faculty of Engineering, 2004. http://ro.uow.edu.au/theses/187.

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This thesis describes a research project which focuses on improving the accuracy, and extending the capabilities of topographic and hydrologic analysis algorithms. These algorithms can be applied within GIS frameworks for parameterisations of hydrologic models. In this research project, several new algorithms were developed to overcome the observed deficiencies in current algorithms for GIS based analysis of raster Digital Elevation Models (DEMs). These algorithms were used to develop a software product CatchmentSIM which has been made freely available to researchers and practitioners. Catchme

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36

Mitchener, Richard G. R. "Hydraulic and chemical property correlations of the Triassic sandstone of Birmingham." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273923.

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Hydraulic conductivity (K), porosity and cation exchange capacity (CEC) were determined at the laboratory scale on samples of the Wildmoor Sandstone and Kidderminster Formations of the Birmingham Triassic sandstone. The impact of the rock colour was considered in a semi-quantitative manner using the Munsell Colour System. SEM, flushing experiments and image analysis of thin-section photomicrographs were used to assess the role of rock fabric in the development of hydraulic and chemical properties. The image analysis was carried out on colour images using a custom-written code. XRD, point count

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37

Zafirakou, Antigoni Koulouris. "Statistical analysis techniques in water resources engineering /." Thesis, Connect to Dissertations & Theses @ Tufts University, 2000.

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Thesis (Ph. D.)--Tufts University, 2000.<br>Adviser: Richard M. Vogel. Submitted to the Dept. of Civil and Environmental Engineering. Includes bibliographical references (leaves 206-214). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

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38

Petroutson, William D., Jeffery B. Bennett, Roderic A. Parnell, and Abraham E. Springer. "Hydraulic-Conductivity Measurements of Reattachment Bars on the Colorado River." Arizona-Nevada Academy of Science, 1995. http://hdl.handle.net/10150/296453.

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From the Proceedings of the 1995 Meetings of the Arizona Section - American Water Resources Association and the Hydrology Section - Arizona-Nevada Academy of Science - April 22, 1995, Northern Arizona University, Flagstaff, Arizona

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Samuel, Welsh. "Applying GIS to Investigate the Spatial Variability of Sub-Glacial Hydrology under Land Terminating Ice Sheets in Western Greenland Ice Sheet." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-305434.

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With continued warming regional surface air temperatures around the Artic in recent decades, there is growing importance in understanding how ice sheet dynamics interact with a shifting global climate system. This research investigates the spatial variability of sub-glacial hydrology under land terminating ice sheets in Western GrIS, when applying varying overburden ice pressures within Shreve’s (1972) hydraulic potential equation. The application of ArcGIS is used with adjusted k-values in the equation to route hydrological network systems under the ice sheet and help identify the processes t

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Paleologos, Evangelos Konstantinos 1958. "Effective hydraulic conductivity of bounded, strongly heterogeneous porous media." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/191184.

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This dissertation develops analytical expressions for the effective hydraulic conductivity Kₑ of a three-dimensional porous medium bounded by two parallel planes of infinite extent separated by a distance 2a. Head varies randomly along each boundary about a uniform mean value. The log hydraulic conductivity Y forms a homogeneous, statistically anisotropic random field having a variance σᵧ² and principal integral scales λ₁, λ₂, λ₃. Flow is uniform in the mean parallel to the principal coordinate χ₁. A solution is first derived for mildly nonuniform media with σᵧ² ≪ 1 via an approximate form of

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Lopez, Sabater Carlos Joaquin. "An empirical model of hydraulic roughness for overland flow." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/280353.

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This research has developed a method for estimating hydraulic roughness coefficients for overland flow models in a dynamic approach, to more effectively simulate runoff on natural, agricultural and urban slopes. The hydraulic roughness coefficients are then generated with a series of neural networks. First, a laboratory experiment was designed to explore the effects of soil microtopography, slope and Reynolds number on the magnitude of Darcy-Weisbach, Manning and Chezy roughness coefficients. It was found that three parameters were necessary to describe the soil surface microtopography. Neural

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Andrén, Jakob. "An Overview of State-of-the-art Hydraulic Conductivity Measurements in Coarse Grained Materials." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445699.

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Embankment dams are made from soil materials of varying sizes and widely used all over the world.When constructing these, knowing the hydraulic conductivity (K) of the soil materials is a keyparameter in order to construct safe embankment dams. A knowledge gap regarding K measurementsin coarse grained soils has been identified. This thesis aims to provide a theoretical overview ofpresent day state-of-the-art methods for measuring hydraulic conductivity and the controllingcharacteristics for K. Coarse grained soils refers to a soil with the coarsest grain fraction being > 20mm and/or have a

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Johnejack, Kent Robert 1958. "Measurement of saturated hydraulic conductivity with a sealed double ring infiltrometer at Page Ranch, Arizona." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278186.

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A sealed double ring infiltrometer (SDRI) was used at Page Ranch, Arizona to measure saturated hydraulic conductivity (Ksat in a test clay pad, as well as to characterize preferential flow and transport mechanisms. Ksat varied from 3.5 x 10⁻⁹ to 2.2 x 10⁻¹⁰ cm/sec depending on treatment of matric potential at the wetting front. These in-situ Ksat values were about one order of magnitude less than the laboratory values that ranged from 10⁻⁷ to 10⁻⁹ cm/sec. Although the pad was not instrumented to detect a shallow wetting front, the dye front and water content data indicated that flow penetrated

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Bagour, Mohammed H., and Donald F. Post. "An Evaluation of Methods to Measure the Saturated Hydraulic Conductivity of Soils." Arizona-Nevada Academy of Science, 2000. http://hdl.handle.net/10150/296564.

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Cole, Matthew C. "Periodic Hydraulic Tests in a Fractured Crystalline Bedrock." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10742695.

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<p>A better understanding of groundwater flow through bedrock fractures is critical to applications involving heat and solute transport. Pumping tests performed to characterize these systems are often ill-suited because the radius of penetration quickly expands beyond the inter-well distance, gaining information beyond the well pair of interest. Periodic hydraulic tests allow the radius of penetration to be controlled by the frequency of oscillation, and testing at multiple frequencies gives parameter estimates for a range of spatial scales. Periodic pumping tests were performed at the Mirror

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Vähäkari, Antti. "Simulering av översvämningar i Nedre Dalälven." Thesis, Uppsala University, Department of Earth Sciences, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88858.

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<p>Mosquitoes are found in extremely large numbers in the lower parts of the River Dalälven. In the year 2000 the mosquito nuisance was especially high, resulting in foundation of the Biological mosquito control project. Since 2001 mosquito larvae are controlled by using a biological pesticide BTI (Bacillus thuringiensis ssp israelensis). The mosquito fauna in the area is dominated by flood water mosquitoes, a group of mosquitoes that are very aggressive and form new generations of mosquitoes during every single flooding event during the summer. To be able to efficiently control the mosquitoes

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Lane, L. J., T. J. Ward, and J. J. Stone. "Evaluation of Hydrologic and Hydraulic Procedures for Small Urban Watersheds in the Southwest." Arizona-Nevada Academy of Science, 1985. http://hdl.handle.net/10150/296362.

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From the Proceedings of the 1985 Meetings of the Arizona Section - American Water Resources Association and the Hydrology Section - Arizona-Nevada Academy of Science - April 27, 1985, Las Vegas, Nevada<br>Hydrologic and hydraulic design procedures developed by the Pima County Department of Transportation and Flood Control District were proposed for use by the Department of Transportation, Engineering Division of the City of Tucson, Arizona. These procedures were evaluated with respect to their reasonableness of approach and in comparison with other methods and existing data used to derive simi

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Muller, Curtis Joseph 1959. "A multi-step steady-state inverse method for the determination of unsaturated hydraulic conductivity in soil columns: A new parameter estimation technique." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278254.

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A problem common to many studies involving the use of unsaturated flow and chemical models is determining a representative expression for the value of unsaturated hydraulic conductivity K(ψ). A new steady-state inverse methodology called the multi-step steady-state outflow method (MSSOM) is presented here for the determination of unsaturated hydraulic conductivity. The method offers a practical alternative for the estimation of K(ψ) using either the exponential model, three-parameter model, or the van Genuchten formulations for K(ψ), a global-optimization simplex routine (MSSOM.EXE), and simpl

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Hernandez-Ochoa, Abel F. "Conditioning nonlocal steady-state flow on hydraulic head and conductivity through geostatistical inversion." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280279.

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Nonlocal moment equations allow one to render optimum predictions of flow in randomly heterogeneous media deterministically conditional on measured values of medium properties and to assess the corresponding predictive uncertainty. I present a geostatistical inverse algorithm for steady-state flow that makes it possible to further condition such predictions and assessments on measured values of hydraulic head and (or) flux. My algorithm is based on recursive finite-element approximations of exact first and second conditional moment equations. Computational efficiency is enhanced through the us

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Colautti, Dennis. "Modelling meteorological and substrate influences on peatland hydraulic gradient reversals." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33734.

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A hydrological modelling effort using MODFLOW was undertaken in order to determine the relative importance of some of the factors influencing hydraulic gradient reversals in peatlands. Model domains were of two types, large raised bog type (LRBT) and kettle bog type (KBT), and were made to undergo various levels of meteorological forcing (water deficit). Substrate, too, was varied in order to determine its importance on reversals. Domain-wide reversals were successfully simulated in LRBT systems, but not in KBT systems. Although simulated flow patterns matched field-observed patterns, both pre

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