Tesis sobre el tema "Water erosion"
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Dun, Shuhui. "Adapting WEPP (Water Erosion Prediction Project) for forest watershed erosion modeling". Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Summer2006/S%5FDun%5F073106.pdf.
Texto completoPuurveen, Hendrikus Joel. "Measurement and simulation of water erosion". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ60168.pdf.
Texto completoGarcia-Chevesich, Pablo Andres. "Erosion Processes and Control". Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195844.
Texto completoVisser, Saskia M. "Modelling nutrient erosion by wind and water in northern Burkina Faso /". Wageningen : Wageningen University and Research Centre, 2004. http://www.mannlib.cornell.edu/cgi-bin/toc.cgi?5046904.
Texto completoParks, Olivia Waverly. "Effect of water temperature on cohesive soil erosion". Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/49663.
Texto completoeffect of water temperature on cohesive soil erosion should be explored. The objectives of this study are to: determine the effect of water temperature on the erosion rates of clay; determine how erosion rates vary with clay mineralogy; and, explore the relationship between zeta potential and erosion rate. Samples of kaolinite- and montmorillonite-sand mixtures, and vermiculite-dominated soil were placed in the wall of a recirculating flume channel using a vertical sample orientation. Erosion rate was measured under a range of shear stresses (0.1-20 Pa) for a period of five minutes per shear stress at water temperatures of 12, 20, and 27�"C. The zeta potential was determined for each clay type at the three testing temperatures and compared to mean erosion rates. The kaolinite erosion rate doubled when the temperature increased from 12 to 20�"C, and erosion of vermiculite samples tripled when the temperature increased from 20 to 27�"C. The montmorillonite samples generally eroded through mechanical failure rather than fluvial erosion, and the limited fluvial erosion of the montmorillonite-sand mixture was not correlated with water temperature. The data suggest correlation between zeta potential and erosion rate; however, due to the small sample size (n=3), statistically significant correlation was not indicated. Research should continue to explore the influence of water temperature on cohesive soil erosion to better understand the influence of clay mineralogy. Due to the high degree of variability in cohesive soil erosion, multiple replications should be used in future work. The vertical sample orientation enabled discrimination between fluvial erosion and mass wasting and is recommended for future studies.
Master of Science
Schmidt, Walter y Marcus Schindewolf. "Erosion 3D Sachsen". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-38172.
Texto completoMutter, Ghazi Maleh. "Water erosion of calcareous soils in South-East England". Thesis, Imperial College London, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318679.
Texto completoOliveira, Paulo Tarso Sanches de. "Water balance and soil erosion in the Brazilian Cerrado". Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-16012015-170452/.
Texto completoO desmatamento nas regiões de Cerrado tem causado intensas mudanças nos processos hidrológicos. Essas mudanças no balanço hídrico e erosão do solo são ainda pouco entendidas, apesar de fundamentais na tomada de decisão de uso e manejo do solo nesta região. Portanto, torna-se necessário compreender a magnitude das mudanças nos processos hidrológicos e de erosão do solo, em escalas locais, regionais e continentais, e as consequências dessas mudanças. O principal objetivo do estudo apresentado nesta tese de doutorado foi de melhor entender os mecanismos dos processos hidrológicos e de erosão do solo no Cerrado Brasileiro. Para tanto, utilizou-se diferentes escalas de trabalho (vertentes, bacias hidrográficas e continental) e usando dados experimentais in situ, de laboratório e a partir de sensoriamento remoto. O estudo de revisão de literatura indica que a erosividade da chuva no Brasil varia de 1672 to 22,452 MJ mm ha-1 h-1 yr-1. Os menores valores encontram-se na região nordeste e os maiores nas regiões norte e sudeste do Brasil. Verificou-se que os valores de interceptação da chuva variam de 4 a 20% e o escoamento pelo tronco aproximadamente 1% da precipital total no cerrado. O coeficiente de escoamento superficial foi menor que 1% nas parcelas de cerrado e o desmatamento tem o potencial de aumentar em até 20 vezes esse valor. Os resultados indicam que o método Curve Number não foi adequado para estimar o escoamento superficial nas áreas de cerrado, solo exposto (grupo hidrológico do solo A), pastagem e milheto. Portanto, nesses casos o uso do CN é inadequado e o escoamento superficial é melhor estimado a partir da equação Q = CP, onde C é o coeficiente de escoamento superficial. O balanço hídrico a partir de dados de sensoriamento remoto para todo o Cerrado Brasileiro indica que a principal fonte de incerteza na estimativa do escoamento superficial ocorre nos dados de precipitação do TRMM. A variação de água na superfície terrestre calculada como o residual da equação do balanço hídrico usando dados de sensoriamento remoto (TRMM e MOD16) e valores observados de vazão mostram uma correlação significativa com os valores de variação de água na superfície terrestre provenientes dos dados do GRACE. Os dados do GRACE podem representar satisfatoriamente a variação de água na superfície terrestre para extensas regiões do Cerrado. A média anual de perda de solo nas parcelas de solo exposto e cerrado foram de 15.25 t ha-1 yr-1 and 0.17 t ha-1 yr-1, respectivamente. O fator uso e manejo do solo (fator C) da Universal Soil Loss Equation para o cerrado foi de 0.013. Os resultados mostraram que o escoamento superficial, erosão do solo e o fator C na área de cerrado variam de acordo com as estações. Os maiores valores do fator C foram encontrados no verão e outono. Os resultados encontrados nesta tese de doutorado fornecem valores de referência sobre os componentes do balanço hídrico e erosão do solo no Cerrado, que podem ser úteis para avaliar o uso e cobertura do solo atual e futuro. Além disso, conclui-se que os dados de sensoriamento remoto apresentam resultados satisfatórios para avaliar os componentes do balanço hídrico no Cerrado, identificar os períodos de seca e avaliar as alterações no balanço hídrico devido à mudanças de uso e cobertura do solo.
Choi, Daniel Mintae. "Rainfall intensity and soil erosion by water : limitations of current erosion models and implications for erosion model-based studies under future climates". Thesis, University of Oxford, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604890.
Texto completoParker, Ronald Dean 1948. "The effect of spatial variability on output from the water erosion prediction project soil erosion computer model". Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/191165.
Texto completoAbdulrahman, Ghaith H. "Erosion-corrosion mapping of carbon steel in oil/water slurries". Thesis, University of Strathclyde, 2011. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=16792.
Texto completoZalewsky, Brian J. "Use of the Water Erosion Prediction Project (WEPP) Model to Predict Road Surface Erosion in Mountain Rangeland Areas". DigitalCommons@USU, 1998. https://digitalcommons.usu.edu/etd/3655.
Texto completoRushforth, Peter John. "The erosion and transport of sewer sediment mixtures". Thesis, University of Sheffield, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366118.
Texto completoNeary, Daniel G., Gerald J. Gottfried, Leonard F. DeBano y Peter F. Ffolliott. "Post-Wildfire Erosion in the Southwest: Causes and Control". Arizona-Nevada Academy of Science, 1998. http://hdl.handle.net/10150/296503.
Texto completoLauque, Olivier. "Effects of abrasive waterjet erosion on single crystal silicon". Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16782.
Texto completoGarcia, Alessandra Reis. "Uso do modelo WEPP ( Water Erosion Prediction Project ) modificado para estimar taxas de erosão em estradas florestais". reponame:Repositório Institucional da UFS, 2001. https://ri.ufs.br/handle/riufs/793.
Texto completoMarttila, H. (Hannu). "Managing erosion, sediment transport and water quality in drained peatland catchments". Doctoral thesis, Oulun yliopisto, 2011. http://urn.fi/urn:isbn:9789514293306.
Texto completoAcharya, Govind. "Analysing the Interactions between Water-induced Soil Erosion and Shallow Landslides". Thesis, University of Canterbury. Department of Civil and Natural Resources Engineering, 2011. http://hdl.handle.net/10092/5194.
Texto completoMokhothu, Motlatsi Nicholas. "The assessment of scale of spatial and temporal water erosion parameters". Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/187485.
Texto completoLe, Roux J. J. (Jacobus Johannes). "Water erosion risk assessment in South Africa : towards a methodological framework". Thesis, University of Pretoria, 2012. http://hdl.handle.net/2263/28198.
Texto completoThesis (PhD)--University of Pretoria, 2012.
Geography, Geoinformatics and Meteorology
unrestricted
Lim, S. Y. "Scour and particle diffusion caused by water jets". Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356261.
Texto completoDeBano, Leonard F. y Malchus B. Jr Baker. "Runoff and Erosion from Hydrophobic Forest Soils During Simulated Rainfall". Arizona-Nevada Academy of Science, 1998. http://hdl.handle.net/10150/296500.
Texto completoStabenow, Joe H., Kristin N. Ulvestad, Logan Fitz, Vern Hardee, Greg Howard, Kris McClelland, Melissa A. Robbins, Wendy Woodward y Fred A. Sundberg. "The Effects of Logging Burned Wood on Soil Erosion Rates". Arizona-Nevada Academy of Science, 2006. http://hdl.handle.net/10150/296641.
Texto completoSheffield, Ronald Erle. "Off-stream water sources for grazing cattle as a stream bank stabilization and water quality BMP". Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-02132009-170910/.
Texto completoPizarro, Roberto, Carolina Morales, Pablo Garcia-Chevesich, Peter F. Ffolliott, Oscar Vallejosa, Leonardo Vega, Rodrigo Valdes, Claudio Olivares y Francisco Balocchi. "Soil Erosion in Arid and Semi-Arid Climates of Northern Chile". Arizona-Nevada Academy of Science, 2011. http://hdl.handle.net/10150/296986.
Texto completoPricope, Narcisa. "Modeling Soil Erosion in the Upper Green River, KY". TopSCHOLAR®, 2006. http://digitalcommons.wku.edu/theses/258.
Texto completoSrivastava, Anurag Dougherty Mark Zech Wesley C. "Application and evaluation of WEPP in a forested watershed with perennial streams". Auburn, Ala., 2010. http://hdl.handle.net/10415/2036.
Texto completoHellin, Jonathan. "Soil and water conservation in Honduras : a land husbandry approach". Thesis, Oxford Brookes University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325265.
Texto completoMa, Ning. "Mathematical Modelling of Water Soil Erosion and Sediment Yield in Large Catchments". Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/575.
Texto completoShinjo, Hitoshi. "Evaluation of Water Erosion Risks in a Semiarid Area in Northeastern Syria". Kyoto University, 2000. http://hdl.handle.net/2433/78106.
Texto completo0048
新制・課程博士
博士(農学)
甲第8434号
農博第1118号
新制||農||801(附属図書館)
学位論文||H12||N3391(農学部図書室)
UT51-2000-F338
京都大学大学院農学研究科農芸化学専攻
(主査)教授 小﨑 隆, 教授 三野 徹, 教授 小林 愼太郎
学位規則第4条第1項該当
Sherriff, Sophie C. "Soil erosion and suspended sediment dynamics in intensive agricultural catchments". Thesis, University of Dundee, 2015. https://discovery.dundee.ac.uk/en/studentTheses/e4d08cd3-dc85-4e0e-96e2-f76430ee27e3.
Texto completoSadiq, Aftab. "Clear-water scour around bridge abutments in compound channels". Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/19308.
Texto completoPuvaneswaran, Pathmadevy. "Agricultural sources for lake pollution : soil erosion in Slapton Ley catchment". Thesis, University of Sheffield, 1990. http://etheses.whiterose.ac.uk/10240/.
Texto completoFrancke, Till Konrad Otto. "Measurement and modelling of water and sediment fluxes in meso-scale dryland catchments". Phd thesis, Universität Potsdam, 2009. http://opus.kobv.de/ubp/volltexte/2009/3152/.
Texto completoIn vielen Regionen der Erde stellt Wassermangel ein Problem für die menschliche Gesellschaft dar. Insbesondere in Trockengebieten werden jedoch Maßnahmen des Wassermanagements, wie die Wasserspeicherung in Stauseen, durch die im Fluss transportierten Sedimentfrachten negativ beeinflusst. Somit stellen eine adäquate Beurteilung von Wasser- und Sedimentflüssen eine wichtige Voraussetzung für Entscheidungen in Wassermanagement und -planung dar. Dieser Problematik widmete sich das SESAM-Projekt (Sediment Export from large Semi-Arid catchments: Measurements and Modelling). Im Rahmen dieses Projektes befasste sich diese Dissertation mit (1) der Entwicklung und Umsetzung eines Erosions-Moduls für ein Einzugsgebietsmodell auf der Meso-Skala, (2) der Entwicklung von Skalierungs- und Generalisierungsmethoden für die Parametrisierung eines solchen Modells, (3) der Durchführung von Messungen, um die notwendigen Daten für das Modell zu gewinnen und (4) die Anwendung des Modells für verschiedene Einzugsgebiete und seiner Bewertung. Die Studie umfasste zwei mesoskalige Trockeneinzugsgebiete in NO-Spanien: Ribera Salada (200 km²) und Isábena (450 km²). Im Hinblick auf Zielstellung 1 wurde WASA-SED, ein räumlich semi-distribuiertes Modell für Wasserflüsse und Sedimenttransport, entwickelt. Das Modell simuliert Abfluss- und Erosionsprozesse auf der Hangskala, den Transport von suspendierten und Geschiebesedimenten auf der Skala von Flussabschnitten sowie Rückhalt- und Remobilisierungsprozesse von Sedimenten in Stauseen. Die vorliegende Arbeit stellt das Modellkonzept und Modellanwendungen vor und beschreibt Fähigkeiten und Grenzen des Modells. Die Modellierung auf größeren Skalen beinhaltet das Dilemma, dass relevante Prozesse beschrieben werden müssen, gleichzeitig aber die Anforderungen an Eingabedaten und Rechenzeit realisierbar bleiben. In WASA-SED wird diesem durch die Anwendung eines innovativen Hangprofil-basierten Skalierungsansatzes Rechnung getragen, indem die Landschaft durch charakteristische Toposequenzen repräsentiert wird. Um derartige Toposequenzen hinsichtlich verschiedener Landschaftseigenschaften (z.B. Relief, Böden, Vegetation) abzuleiten, wurde in Bezug zur Zielstellung 2 der LUMP-Algorithmus (Landscape Unit Mapping Program) entwickelt. LUMP beinhaltet ein Verfahren zur Berechnung repräsentativer Hangprofile und ihrer Attribute aus einem digitalen Geländemodell und optionalen Zusatzdaten. Durch die Klassifikation dieser Hangprofile wird die Grundlage der räumlichen Diskretisierung des WASA-SED Modells bereitgestellt. Im Zusammenhang mit Zielstellung 3 wurden Abfluss und Sedimentkonzentration (SSC) am Auslass und in einigen Teileinzugsgebieten des Isábena-Einzugsgebietes gemessen. Um den Sedimentaustrag zu bestimmen, mussten die Einzelmessung der Sedimentkonzentration interpoliert werden. Diese Arbeit vergleicht die Eignung traditioneller Eichkurvenansätze (SRCs), Generalized Linear Models (GLMs) und der nichtparametrischen Regressionstechniken Random Forests (RF) und Quantile Regression Forests (QRF). Da die beobachteten SSC-Werte stark über sechs Größenordnungen variieren, erwiesen sich die traditionellen SRCs als unzureichend. Gleichfalls versagten GLMs trotz der Einbeziehung weiterer relevanter Prozessgrößen wie Niederschlagsintensitäten und Abflusscharakteristika. RF und QRF stellten sich hingegen als sehr robust und für die Rekonstruktion der Sedimentdynamik geeignet dar. QRF liefert darüber hinaus auch Informationen zur Genauigkeit dieser Schätzungen. Die darauf aufbauende Analyse ergab, dass der Großteil der Sedimentfracht während der Starkregenereignisse des Spätsommers transportiert wurde. Spätere Niederschlagsereignisse erzeugten deutlich geringeren Austrag. Durch den Vergleich von Sedimentfrachten im Oberlauf mit Austragsmengen am Gebietsauslass konnte die Bedeutung der Sedimentspeicherung im Flussbett identifiziert werden. Zielstellung 4 wurde bearbeitet, indem das WASA-SED-Modell für zwei Untersuchungsgebiete in NO-Spanien unter unterschiedlichen Gesichtspunkten angewendet wurde. Für das Ribera-Salada-Einzugsgebiet lieferte das unkalibrierte Modell plausible Ergebnisse hinsichtlich der Wasser- und Sedimentflüsse. Damit war es möglich, die potentiellen Änderungen dieser Größen durch verschiedene Landnutzungsszenarien zu quantifizieren. Diese wurden den prognostizierten Veränderungen, die durch Klimaänderungen hervorgerufen würden, gegenübergestellt. Im Gegensatz dazu konzentrierte sich die Anwendung im Isábena-Einzugsgebiet auf die Untersuchung der bestmöglichen Modellanpassung. Im Validierungszeitraum ergab sich eine befriedigende Modellgüte für Wasser- und Sedimentflüsse. Diese Gesamtgüte wurde maßgeblich durch die unzureichende Abbildung der Unterliegergebiete beeinflusst, wohingegen die Gebiete des Oberlaufs, trotz ihrer stark kontrastierenden Sedimentausträge, gut dargestellt wurden. Die Anwendung des WASA-SED-Modells auf drei verschiedene Untersuchungsgebiete bestätigt die generelle Eignung des Modellkonzepts als einen sinnvollen multiskaligen Ansatz, der in einem Modell effektiv die Hangskala mit der Einzugsgebietsskala sowie den Einfluss von Flüssen und Stauseen vereint. Er stellt somit eine mögliche Grundlage für die Bearbeitung von wasser- und sedimentbezogenen Fragestellungen auf der Meso-Skala dar. Die besondere Bedeutung der Prozesse der Sickerverluste und Sedimentspeicherung im Gerinne konnten herausgearbeitet werden. Mögliche Verbesserungen betreffen die Berücksichtigung der Konnektivität von Wasser- und Sedimentflüssen (auf dem Hang, zwischen Hang und Fluss, innerhalb des Flusses) und die Qualität der Eingangsdaten für das Modell.
Lopes, Vicente L. "Using an Erosion Equation to Predict Sediment Yield from Overland Flow Systems". Arizona-Nevada Academy of Science, 1991. http://hdl.handle.net/10150/296437.
Texto completoThe erosion process by overland flow was analyzed in its fundamental aspects. A general predictive erosion equation was developed by combining the conditions for conservation of mass of the sediment, boundary hydraulic shear, and the sediment transport formula of Einstein-Brown. The ability of the equation to predict sediment yield from overland flow areas was demonstrated using field data from rainfall simulator plots. Comparison of the results indicated that the erosion equation presented herein can be used to predict sediment yield from unrilled overland flow areas with satisfactory confidence.
Kauffman, Arron T., Cody L. Stropki, Peter F. Ffolliott, Gerald J. Gottfried y Daniel G. Neary. "Hillslope Erosion Rates in the Oak Savannas of the Southwestern Borderlands Region". Arizona-Nevada Academy of Science, 2007. http://hdl.handle.net/10150/296681.
Texto completoSymeonakis, Elias. "Soil erosion modelling over sub Saharan Africa using remote sensing and geographical information systems". Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248386.
Texto completoHairsine, Peter Brian. "A Physically Based Model of the Erosion of Cohesive Soils". Thesis, Griffith University, 1988. http://hdl.handle.net/10072/366307.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Division of Australian Environmental Studies
Science, Environment, Engineering and Technology
Full Text
DeBano, Leonard F. y Malchus B. Jr Baker. "The Effect of Hydrophobic Soils on Infiltration, Runoff, and Erosion in Wildland Soils". Arizona-Nevada Academy of Science, 1998. http://hdl.handle.net/10150/296501.
Texto completoCanfield, Howard Evan. "Spatial Variability and Model Complexity in Erosion Prediction on a Semiarid Rangeland Watershed". Arizona-Nevada Academy of Science, 2000. http://hdl.handle.net/10150/296550.
Texto completoNeary, Daniel G. y Pablo Garcia-Chevesich. "Hydrology and Erosion Impacts of Mining Derived Coastal Sand Dunes, Chañaral Bay, Chile". Arizona-Nevada Academy of Science, 2008. http://hdl.handle.net/10150/296690.
Texto completoFfolliott, Peter F., Gerald J. Gottfried, Aaron T. Kauffman, Cody L. Stropki y Hui Chen. "Fire Effects on Soil Erosion and Deposition on Hillslopes in the Oak Savannas". Arizona-Nevada Academy of Science, 2010. http://hdl.handle.net/10150/296719.
Texto completoAli, Gebril Motawil. "Water erosion on the northern slope of Al-Jabal Al-Akhdar of Libya". Thesis, Durham University, 1995. http://etheses.dur.ac.uk/1035/.
Texto completoQin, Zongyi. "Investigation of the cavitation mechanism and erosion of submerged high pressure water jets /". [St. Lucia, Qld.], 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17666.pdf.
Texto completoWaldmann, Daniel. "Large-Scale Process-Oriented Modelling of Soil Erosion by Water in Complex Watersheds". Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-115757.
Texto completoBrown, Sandra J. "Runoff generation and water erosion in the uplands of the Lower Fraser Valley". Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28925.
Texto completoLand and Food Systems, Faculty of
Graduate
de, Haan Vincent. "The Effects of Erosion-control Structures and Gully Erosion on Groundwater Dynamics Along the Kromrivier, Eastern Cape, South Africa". Thesis, Stockholms universitet, Institutionen för naturgeografi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-127310.
Texto completoWeber, Diana. "Relative contribution of sediment from upland and channel erosion". Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/20154.
Texto completoBaldassarini, Jéssica de Sousa [UNESP]. "Contribuição ao estudo das dinâmicas de perda de solo por meio de técnicas diretas e indiretas de estimação em propriedades rurais de Getulina e Vera Cruz - SP". Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/153791.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
A busca pelo entendimento das dinâmicas envolvidas na perda de solo, objetivando tanto sua mensuração como também o emprego de ações que visem sua recuperação e conservação, vem ganhando espaço no meio científico devido aos problemas socioambientais e econômicos resultantes desta degradação. Estes problemas não se restringem a produtividade agrícola, como também favorecem o empobrecimento do meio rural, a poluição e assoreamento dos cursos d’água, a dependência financeira e tecnológica dos sujeitos sociais etc. Para compreender as dinâmicas e os fatores relevantes na perda de solo foi aplicado distintos métodos de determinação, um de estimação direta, por meio das parcelas de monitoramento com pinos de erosão e um indireto, por meio da Equação Universal de Perda de Solos (EUPS), que permitissem a comparação dos resultados obtidos em campo com os da aplicação do modelo. O estudo foi realizado em duas propriedades agrícolas que possuem características naturais e de uso e ocupação distintas, atribuindo-lhes complexidades espaciais particulares. Uma localiza-se em Getulina e é destinada a pecuária e a outra localiza-se em Vera Cruz com a produção de café. Foi possível identificar nas propriedades agrícolas características naturais que tornam seus solos suscetíveis a perda por processos erosivos, porém, que as formas de uso e ocupação destes espaços foram fundamentais para o entendimento dos totais de perda registrados pelos métodos de determinação. Esta complexidade fundamenta a necessidade de abordar a perda de solo como fenômeno geográfico, decorrente de aspectos naturais e sociais que expressam demandas, interesses e funcionalidades socialmente construídas que fundamentam sua apropriação.
Looking to understanding the dynamics involving the soil loss, aiming at both its measurement as well as the actions aimed use at their conservation and recovery, is gaining space in the scientific world due to environmental and economic problems resulting from this degradation. These problems are not restricted to agricultural productivity, but also promote rural impoverishment, pollution and siltation water courses, social subjects financial and technological dependence, etc. The different methods of determination, a direct estimation, through the monitoring plots with erosion pins and an indirect, through the Universal Soil Loss Equation (USLE) was applied to understand the dynamics and relevant factors on soil loss and also to allow the results comparison obtained in the field where was applied the models. The study was conducted in two farms where we could find different use and occupation natural characteristics assigning them particular spatial complexities. One farm is located in Getulina and is intended for livestock (animals) and the other is located in Vera Cruz where they grow coffee, both in southeastern Brazil, São Paulo State. It was possible to identify the properties that make their natural features agricultural soils susceptible to loss through erosion, however, that the use and occupation forms of these spaces were fundamental for the understanding the loss totals recorded by determination methods. This complexity is motivated by the need to address the soil loss as geographical phenomenon, resulting from natural and social aspects that express demands, interests and socially constructed features that underlie your ownership.
2014/02230-6
Roy, Siddhartha. "Interplay of Water Chemistry and Entrained Particulates in Erosion Corrosion of Copper and Nonleaded Alloys in Potable Water Systems". Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/82668.
Texto completoPh. D.