Dissertations / Theses on the topic 'Soil erosion Measurement'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 20 dissertations / theses for your research on the topic 'Soil erosion Measurement.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Michaud, Aubert Raymond. "Soil erodibility indices for Southern Quebec soils derived under variable intensity rainfall simulation." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66178.
Full textHoepner, Melinda Ann. "Stability of cohesive sediments from flume and rheometer measurements." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/20701.
Full textCharonko, Cami Marie. "Evaluation of an In Situ Measurement Technique for Streambank Critical Shear Stress and Soil Erodibility." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/33401.
Full textTo evaluate the repeatability, a total of 21 jet tests were conducted on two remolded soils, a clay loam and clay, compacted at uniform moisture content to a bulk density of 1.53 g/cm^3 and 1.46 g/cm^3, respectively. To determine the similarity between JTD and a traditional measurement method, JTD Ï c and kd measurements were compared with measurements determined from flume tests.
The JTD kd and Ï c ranged from 1.68-2.81 cm^3/N-s and 0.28-0.79 Pa, respectively, for the clay loam and 1.36-2.69 cm^3/N-s and 0.30-2.72 Pa, respectively, for the clay. The modest variation of kd and Ï c for the remolded soils suggests the JTD is repeatable, indicating the wide range of parameters measured in the field was a result of natural soil variability. The JTD median kd and Ï c, except clay loam kd (clay loam kd = 2.31 cm^3/N-s, Ï c = 0.45 Pa; clay kd = 2.18 cm^3/N-s, Ï c = 1.10 Pa) were significantly different than the flume values (clay loam kd = 2.43 cm^3/N-s, Ï c = 0.23 Pa; clay kd = 4.59 cm^3/N-s, Ï c = 0.16 Pa); however, considering the range of potential errors in both test methods, the findings indicate the multiangle submerged jet test provides reasonable measurement of erosion parameters in a field setting.
Master of Science
Tiessen, Kevin. "Measurement and modelling of tillage and water erosion within intensive potato production systems of northwestern New Brunswick, Canada." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66791.
Full textAu Canada, il est maintenant admis que l'érosion par le travail du sol est une forme importante de dégradation du sol et une menace à la viabilité de l'agriculture dans tout le pays. Jusqu'à présent, le potentiel de l'érosion par le travail du sol dans la culture de la pomme-de-terre (Solanum tuberosum L.) n'a pas été étudié. A cette fin, des expériences au champ ont été menées dans le nord-ouest du Nouveau-Brunswick afin de produire des valeurs pour la translocation du sol ainsi que pour l'érosivité des équipements utilisés au cours des travaux du sol primaire, secondaire et "tertiaire" (c.-à-d., les opérations de plantation, buttage et de récolte) pour la culture de la pomme-de-terre. Le potentiel de l'érosion par le travail du sol était semblablement élevé pour la charrue à versoirs, le chisel et le pulvériseur offset, mais moins élevé pour le vibroculteur. Etonnamment, les opérations tertiaires ont déplacé le sol plus loin et étaient plus érosives que les opérations primaire ou secondaire, seules ou combinées. Dans l'ensemble, le risque de l'érosion par le travail du sol dans la culture de la pomme-de-terre est considérablement plus important que pour les autres systèmes culturaux typiques du Canada. L'érosion par l'eau est également un problème d'envergure dans les régions de production de la pomme-de-terre du Canada atlantique. Cependant, aucune étude antérieure ne s'est penchée sur l'impact combiné de l'érosion par le travail du sol et par l'eau dans cette culture. Des mesures répétées des retombées radioactives de césium-137 (137Cs) ont révélé des pertes de sol annuelles de 13.6 Mg ha-1 an-1 entre 1990 et 2005 à un site de référence au Nouveau-Brunswick, avec environ la moitié des endroits échantillonnés ayant des pertes au delà du seuil tolérable de 6 Mg ha-1 an-1. Un nouveau modèle, le Directional Tillage Erosion Model (DirTillEM
Navarro, Hernan Ricardo. "Flume Measurements of Erosion Characterstics of Soil at Bridge Foundations in Georgia." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7267.
Full textBarchyn, Thomas Edward, and University of Lethbridge Faculty of Arts and Science. "Field-based aeolian sediment transport threshold measurement : sensors, calculation methods, and standards as a strategy for improving inter-study comparison." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Geography, 2010, 2010. http://hdl.handle.net/10133/2616.
Full textxi, 108 leaves : ill. ; 29 cm
Lawrence, Cameron Eoin. "Measurement of 222Rn Exhalation Rates and 210Pb Deposition Rates in a Tropical Environment." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16291/1/Cameron_Lawrence_Thesis.pdf.
Full textLawrence, Cameron Eoin. "Measurement of 222Rn Exhalation Rates and 210Pb Deposition Rates in a Tropical Environment." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16291/.
Full textHiggitt, David L. "The use of caesium-137 measurements in erosion investigations." Thesis, University of Exeter, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279722.
Full textSheridan, Gary James Sheridan Gary James. "Predicting hillslope scale erodibility and erosion on disturbed landscapes from laboratory scale measurements /." [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16294.pdf.
Full textOwens, Philip Neil. "Towards improved interpretation of caesium-137 measurements in soil erosion studies." Thesis, University of Exeter, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384997.
Full textKuhnert, Matthias. "Quantifizierung von Oberflächenabfluss und Erosion auf Böden mit hydrophoben Eigenschaften." Phd thesis, Universität Potsdam, 2009. http://opus.kobv.de/ubp/volltexte/2009/3287/.
Full textThe objective of the thesis is the investigation of water repellent soil conditions and their consequences on surface runoff and erosion by water on different scales. The test site is a lignite mining area situated in Welzow Süd (south east Germany). The processes are to investigate on three different scales, starting with a plot scale (1 m²), then a hill slope scale (300 m²) and, finally, with a small catchment area (4 ha). The level of water repellency was quantified by both direct (contact angle) and indirect measurement (persistence of the soil). The results show seasonal differences with hydrophilic soil conditions during winter and water repellent reactions during summer. For this change in soil conditions, the soil water content is pronounced in literature to be the most important factor. On the test site, the soil water content changed instead as a consequence of the thawing of the soil which affects the hydrophilic conditions of the soil itself. The spatial differences of the soil water content are related to rill and channel areas (hydrophillic) and to knoll areas (water repellent). Both the spatial as well as the temporal variation of the soil conditions affect surface runoff which is investigated as a runoff coefficient (RC: ratio of amount of surface runoff to amount of precipitation). The RC shows higher values on soil with water repellent conditions (RC=0.8) in comparison with the values on hydrophilic soils (RC=0.2). The hydrophilic conditions predominate in areas with different substrates and during the winter. Observations on different scales show a decreasing RC as the size of the area increases (RC = 0.8 on the plot scale, RC = 0.5 on the hill slope scale and RC = 0.2 for the entire catchment area). The reasons for this are the hydrophilic rill in the hill slope area and the hydrophilic substrate in the entire catchment area. The measurement of erosion, based on different methods, some of them just newly developed, quantifies in a good resolution sediment transport spatially as well as temporally. The central part of one of the newly developed approaches is a balance which quantifies an event based sediment output. This approach is coupled with a tipping bucket to measure surface runoff. The system has been developed for coarse textured areas with little amounts of sand and silt. Additionally, two laser systems are used to detect changes in the soil surface over the spatial distribution. The first method contains a laser which measures only a single point and has to be moved in a fixed apparatus above the soil surface in a well defined raster. The areas of sediment abrasion and the detachment areas are restricted by interpolation of the measurement results. This method enables measurements on large areas (16 m² in this project), but tends to result in a high level of errors in the transition zone between rill and interrill. The second laser system covered an area of 1 m² in high resolution. To construct a three-dimensional picture, four different pictures have to be taken from four different directions. This defines the abrasion and detachment areas in a very detailed manner, but the method is very time-consuming and covers only a small area. In addition, measurements on the plots collected the amount of sediment output on a small scale. These results show, corresponding to the water repellent soil conditions, high rates of sediment output during summer, but low rates during winter season. The results show also the dominance of rill erosion in comparison with interrill erosion during high intensity rainfall events (>25 mm/h during one interval of ten minutes). On the contrary, interrill erosion becomes more important during low intensity rainfall events (<20 mm/h during at one interval of ten minutes). At least a 9 mm amount of precipitation with a minimum intensity of 3.6 mm/h is necessary to provoke erosion on this test site. Based on the measurement results regression empirical equations were developed to quantify surface runoff and sediment output. While, surface runoff correlates well with the amount of precipitation (r² = 0,9), sediment output shows little correlation to the amount and intensity of the precipitation (r² = 0,7). In summary, the thesis described effects of water repellent soil conditions on surface runoff and erosion on different scales. The effects on the smaller scales especially are of high interest to hydrological processes.
Doering, Che. "Measurements of the distribution and behaviour of Beryllium-7 in the natural environment." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16513/1/Che_Doering_Thesis.pdf.
Full textDoering, Che. "Measurements of the distribution and behaviour of Beryllium-7 in the natural environment." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16513/.
Full textFuruichi, Takahisa. "Soil erosion and sedimentation in the Lake Inle catchment, Myanmar (Burma)." Phd thesis, 2007. http://hdl.handle.net/1885/149643.
Full textParate, Harshad Rameshwar. "Field Investigations And Modeling of Flow in Vadose Zone in a Forested Watershed." Thesis, 2016. http://etd.iisc.ernet.in/handle/2005/2726.
Full textJianfar, Arjan. "Evaluation of erosion rates and their impact on riverbank stability." 2014. http://hdl.handle.net/1993/23929.
Full textHagos, Dawit Berhane. "A distributed sediment delivery ratio concept for sediment yield modelling." Thesis, 2004. http://hdl.handle.net/10413/3581.
Full textThesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2004.
Everett, Sarah E. "Assessment of plutonium as a tracer of soil and sediment transport using accelerator mass spectrometry." Phd thesis, 2009. http://hdl.handle.net/1885/150859.
Full textWahome, Ephantus Karuku. "Soil erosion measurements under natural rainfall for evaluating the Universal Soil Loss Equation in Manitoba." 2009. http://hdl.handle.net/1993/3648.
Full text