Rozprawy doktorskie na temat „Macropore flow”
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Rombang, Johan Alexander. "An investigation into subsurface macropore flow using an artificial macropose system". Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336690.
Pełny tekst źródłaRatcliffe, Elizabeth B. "Short-term hydrological responses of a forested hillslope during rainstorms, at Panola Mountain Research Watershed, Georgia, USA". Thesis, University of Bristol, 1996. http://hdl.handle.net/1983/099d7ff8-9ba5-41f8-ae62-78f063f8e8be.
Pełny tekst źródłaWeiler, Markus Helmut Weiler Markus Helmut. "Mechanisms controlling macropore flow during infiltration : dye tracer experiments and simulations /". Zürich : ETH, Eidgenössische Technische Hochschule Zürich, IHW, Institut für Hydromechanik und Wasserwirtschaft, 2001. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=14237.
Pełny tekst źródłaBatany, Stéphane. "Influence d’un macropore sur l’écoulement et le transport de solutés en milieu poreux : expérimentations sur sol modèle macroporé et simulations numériques". Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1085/document.
Pełny tekst źródłaFlow and transport modeling through porous media is of primary concern nowadays, especially in order to progress in the understanding of pollutant transfers through soils. Soils present frequently heterogeneities such as macropores (caused by fauna, flora or cracks) and several numerical models use double or multi permeability concepts in order to take into account all flow types that may exist in such porous systems. Nevertheless, classical models seem underestimate the macropore effect on preferential flow and transport by restricting the preferential flow zone only to the volume occupied by the macroporosity. Various experimental studies prior to this thesis have questioned this hypothesis. This study proposes to understand the establishment of preferential flow and transport and in particular the mechanism of flow and solute exchanges between a synthetic macropore and a surrounding porous matrix in saturated condition. For this purpose, water tracing are realized for a model porous media constituted by glass beads, crossed by a synthetic macropore and implemented in laboratory columns. Breakthrough and transport in columns are characterized by monitoring the concentration at the end of the column by magnetic nuclear resonance. A numerical model developed on the basis of lattice-Boltzmann method is used to simul ate flow in macroporous system and identify preferential flow mechanisms at pore scale. Experimental data show that tracer transport is strongly dependent on injection flow rate and the diffusion coefficient in water. At high flow rate, the transport seems to occur exclusively in the macropore, with very little masse exchange with the porous matrix. At lower flow rates, the breakthrough exhibits an inflexion followed by a peak. The MRI images show a significant mass exchange of tracer between the macropore and the surrounding porous matrix. The numerical simulations are used to calculate the flow field in a porous system as a function of flow rate. They show that preferential flow is extended in porous matrix into a zone of same dimension the mean diameter of beads regardless of macropore size or injected flow rate, in the range of simulated flow rates. These experimental and numerical results show that macropore influence on transport should be extended through the surrounding porous matrix into a zone of the same size of grains diameter for flow and into a zone depending on diffusion coefficient as well as mean residence time of the studied tracer for solute transport
Asare, Seth Ntiri. "Investigation of soil macroporosity and macropore flow in agricultural soils using volume CT scanner". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0007/NQ40361.pdf.
Pełny tekst źródłaVivian, Benjamin James. "The role of rapid recharge processes in the initiation of landslides". Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286619.
Pełny tekst źródłaNaveed, Muhammad, Per Moldrup, Marcel G. Schaap, Markus Tuller, Ramaprasad Kulkarni, Hans-Jörg Vogel i de Jonge Lis Wollesen. "Prediction of biopore- and matrix-dominated flow from X-ray CT-derived macropore network characteristics". COPERNICUS GESELLSCHAFT MBH, 2016. http://hdl.handle.net/10150/621951.
Pełny tekst źródłaPechenik, Natalie. "Lateral macropore dominated flow on a clay settling area in the phosphate mining district, peninsular Florida". [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002982.
Pełny tekst źródłaTurpin, Karine. "Macropore flow and soil hydraulic properties as affected by manurebiosolids injector implements under variable soil physical conditions". Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27062.
Pełny tekst źródłaMcEwen, Amiana Marie. "Abundance, Distribution, and Geometry of Naturally Occurring Macropores in Stream Banks". Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/95948.
Pełny tekst źródłaMS
Larsson, Martin. "Quantifying macropore flow effects on nitrate and pesticide leaching in a structured clay soil : field experiments and modelling with the MACRO and SOILN models /". Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5489-1.pdf.
Pełny tekst źródłaMartín, Sánchez David. "Desarrollo de biosensores fotónicos basados en membranas de silicio poroso". Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/125695.
Pełny tekst źródła[CAT] El desenvolupament dels biosensors està permetent realitzar anàlisis bioquímics cada vegada més ràpids, de manera molt més senzilla i utilitzant una menor quantitat de mostra. Això està donant lloc a aplicacions en les quals es monitoritzen paràmetres de manera contínua i autònoma, augmentant l'eficiència i reduint els costos. El tema principal d'aquesta Tesis ha sigut el desenvolupament i l'avaluació de biosensors basats en tècniques de transducció òptica, fabricats en silici porós, un material nanoestructurat que pot arribar a aconseguir una gran sensibilitat. El treball ha consistit en l'estudi de la fabricació i la caracterització de membranes de silici porós obtingudes a partir de substrats tipus p de baixa resistivitat. Per a fer-ho, s'ha desenvolupat un model matemàtic realista que permet simular el comportament del transductor i calcular els seus paràmetres experimentals. Gràcies a això, s'han estudiat propietats del material com l'efecte tèrmic, el que ha permés caracteritzar l'efecte termo-òptic del silici porós en el rang infraroig de l'espectre. A més, s'ha analitzat la infiltració de la mostra en el transductor amb l'objectiu de millorar el seu funcionament. Per aquest motiu, s'han examinat diferents morfologies de porus i s'ha implementat un flux actiu durant el sensat, en el qual la substància a analitzar fluïx a través de la membrana porosa, resolent problemes d'ompliment del sensor i mesclat amb altres substàncies.
[EN] The development of biosensors is leading to faster and simpler analyses of biochemical samples, using them in lower quantities. Over the last years, these advances have allowed the emergence of applications where parameters can be monitored continuously and autonomously, increasing the efficiency and reducing the costs. This Thesis has focused on the development and evaluation of biosensors based on optical transducers, which are fabricated with porous silicon, a nanostructured material that is able to reach a high sensitivity. In this work, the fabrication and characterization of porous silicon membranes using heavily doped p-type silicon wafers have been studied. A realistic mathematical model has been developed in order to simulate the transducer's behavior and calculate the experimental parameters. This has led to the study of physical properties such as the thermal effect, where we were able to characterize the thermo-optic coefficient in the near-infrared range. Moreover, the penetration of the sample into the structure has been analyzed. For this purpose, several pore morphologies were examined and an active flow has been implemented during the sensing experiments, where the substance of interest flows through the porous membrane, to solve problems such as the partial filling of the sensor or the mixture of different substances during the experiments.
Martín Sánchez, D. (2019). Desarrollo de biosensores fotónicos basados en membranas de silicio poroso [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/125695
TESIS
McDonald, Douglas Joseph. "The role of macropores in subsurface flow on a forested slope, an experimental investigation". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ40480.pdf.
Pełny tekst źródłaPerret, Johan S. "Characterization, visualization and quantification of soil macropores and preferential flow using SPECT and X-ray CAT scanning". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq52022.pdf.
Pełny tekst źródłaBruggeman, Adriana C. Jr. "Preferential movement of solutes through soils". Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/26159.
Pełny tekst źródłaPh. D.
Steiner, Laure D. "A Study of the fate and transport of estrogenic hormones in dairy effluent applied to pasture soils". Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1306.
Pełny tekst źródłaJiang, Shuang. "Bacterial leaching from dairy shed effluent applied to a fine sandy loam under flood and spray irrigations". Lincoln University, 2008. http://hdl.handle.net/10182/668.
Pełny tekst źródłaCey, Edwin E. "Macropore flow and transport dynamics in partially saturated low permeability soils". Thesis, 2007. http://hdl.handle.net/10012/3438.
Pełny tekst źródłaCavers, Curtis G. "Characteristics of Red River clays pertaining to vertisolic criteria and macropore flow". 2009. http://hdl.handle.net/1993/3706.
Pełny tekst źródłaArora, Bhavna. "Modeling Biogeochemistry and Flow within Heterogeneous Formations in Variably-Saturated Media". Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11499.
Pełny tekst źródłaLuo, Lifang Lin Hangsheng. "Quantification of soil macropore network and its relationship to preferential flow using combined x-ray computed tomography and breakthrough curve analysis". 2009. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-3370/index.html.
Pełny tekst źródłaSun, Hao. "Carbon Sequestration through Biochar Soil Amendment: Experimental studies and mathematical modeling". Thesis, 2012. http://hdl.handle.net/1911/64652.
Pełny tekst źródłaFrey, Steven Kurt. "A detailed hydrologic evaluation of tile-drained macroporous soils: A field and modelling study". Thesis, 2011. http://hdl.handle.net/10012/5811.
Pełny tekst źródłaFröhlich, Daniel. "Raumzeitliche Dynamik der Parameter des Energie-, Wasser und Spurengashaushalts nach Kleinkahlschlag". Doctoral thesis, 2009. http://hdl.handle.net/11858/00-1735-0000-0006-B12C-F.
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