Дисертації з теми "Geomorphological"
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Green, Anthony P. E. "Geomorphological modelling of meandering rivers." Thesis, University of Nottingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430480.
Повний текст джерелаMaddock, Ian Philip. "Instream habitat assessment : a geomorphological approach." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/32916.
Повний текст джерелаWood, Joseph. "The geomorphological characterisation of Digital Elevation Models." Thesis, University of Leicester, 1996. http://hdl.handle.net/2381/34503.
Повний текст джерелаRussell, Andrew J. "The geomorphological and sedimentological effects of jokulhlaups." Thesis, University of Aberdeen, 1991. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU045907.
Повний текст джерелаBriggs, Alison Rachel. "The geomorphological performance of restored and rehabilitated rivers." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302352.
Повний текст джерелаMillington, Catherine. "The geomorphological dynamics of a restored forested floodplain." Thesis, University of Southampton, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443031.
Повний текст джерелаFÃ, Marcelo Martins de Moura. "Geomorphological Evolution of Natural Site in Fortaleza, CearÃ." Universidade Federal do CearÃ, 2008. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=5130.
Повний текст джерелаO SÃtio Natural de Fortaleza, apesar dos atuais padrÃes de uso e ocupaÃÃo, ainda apresenta uma significativa diversidade de elementos constitutivos, os quais foram abordados neste trabalho sob uma anÃlise geomorfolÃgica que se inicia no longo termo e alcanÃa os dias atuais. Este texto objetiva essencialmente abordar os principais aspectos da gÃnese e evoluÃÃo geomorfolÃgica do sÃtio natural onde atualmente se situa e se desenvolve a cidade de Fortaleza, capital do Estado do CearÃ, Nordeste do Brasil, tendo como elemento norteador e teÃrico o PrincÃpio do Atualismo, associado a um conjunto de tÃcnicas que permitiram o desenvolvimento das anÃlises acerca do tema pesquisado. Ao longo da dissertaÃÃo, dividida em trÃs partes, alÃm de apresentar uma caracterizaÃÃo natural da cidade de Fortaleza e discutir a ciÃncia geomorfolÃgica e o PrincÃpio do Atualismo, tratamos dos principais elementos da evoluÃÃo morfoestrutural da Ãrea ao longo do CretÃceo, bem como dos perÃodos TerciÃrio e QuaternÃrio da Era CenozÃica e seus eventos intrÃnsecos, eventos estes, essenciais para o inÃcio da configuraÃÃo atual do meio fÃsico analisado. Com relaÃÃo aos aspectos mais recentes da evoluÃÃo geomorfolÃgica analisada, discutimos os relevos presentes no sÃtio natural de Fortaleza, com caracterizaÃÃes e anÃlises mais verticalizadas, bem como da participaÃÃo, condicionante e condicionada, desses relevos na dinÃmica atual. Finalizando o trabalho, analisamos o principal processo de degradaÃÃo da paisagem analisada, o processo de urbanizaÃÃo de Fortaleza, com a expansÃo da malha urbana e seus perÃodos mais significativos, citando suas causas, as direÃÃes dessa expansÃo e, principalmente, os elementos da paisagem alterados pela urbanizaÃÃo, bem como, os processos de degradaÃÃo ambiental presentes no cotidiano da cidade no sÃculo XXI. Os resultados obtidos puderam apontar as feiÃÃes geomorfolÃgicas resultantes dos processos morfoestruturais de idade CretÃcea e ainda presentes na paisagem, bem como sua influÃncia para os processos posteriores. AlÃm disso, apresentamos uma hipÃtese evolutiva para a deposiÃÃo da FormaÃÃo Barreiras ao longo do TerciÃrio na Ãrea em tela, bem como uma proposta de um possÃvel paleo-curso do rio CocÃ, principal rio da cidade de Fortaleza, o qual teria sido alterado ao longo do QuaternÃrio atà alcanÃar suas caracterÃsticas atuais. Com base no mapeamento realizado e analisado, propomos uma classificaÃÃo para as lagoas ainda presentes e que constituem o sÃtio natural de Fortaleza. Por fim, apresentamos as principais caracterÃsticas morfolÃgica da cidade, bem como o estÃgio atual dos relevos da cidade e seu mÃtuo inter-relacionamento. Finalizando, analisamos a influÃncia do processo de urbanizaÃÃo na degradaÃÃo dessas feiÃÃes, os fatores e os efeitos da pressÃo exercida pelo meio antrÃpico sobre o sÃtio natural, a preocupaÃÃo com os rumos desse processo, a necessidade de se pensar e repensar este quadro, bem como, a importÃncia de se conhecer esse sÃtio natural, esse meio fÃsico tÃo presente no cotidiano de todos os citadinos e, ao mesmo tempo, ignorado e/ou desconhecido na sua essÃncia e dinÃmica.
The natural site of Fortaleza city, despite of the present standards of use and occupation of the soil, still presents a significant natural diversity, which were approached in this work under a geomorphological analysis that is initiated in the geological long term and achieves in the present days. The objectives ot the work are the main aspects of the geomorphological genesis and evolution of the natural site of the city of Fortaleza, capital of the State of CearÃ, Northeast of Brazil, having as theoretical support the Principle of Actualism, associated to an assembly of techniques that permitted the development of the analyses about the subject researched. The work, divided in three part, besides presenting a natural characterization of the city of Fortaleza, highlights the main elements of the morphostructural evolution of the area during the Cretaceous, the Quaternary and Tertiary periods and its inherent events. Regarding the most recent aspects of the geomorphological evolution, we discuss the present reliefs of the natural site of Fortaleza, with characterizations and vertical analyses, as well as the role of these reliefs in the present dynamics. Finalizing the research, we analyze the main process of environmental degradation of the landscape associated to the more significant urban development of Fortaleza, as well as the consequences of the environmental degradation for the routine one of the city in the century XXI. The results obtained could indicated the geomorphological features resultant of the action of geomorphological process during the Cretaceous still presents in the landscape, as well as its influence in the subsequent geomorphological evolution. Besides, we present a hypothesis of evolution for the deposition of the Barreiras Formation during the Tertiary, as well as a proposal of a possible paleo-valley of Cocà River, the main river of the city, which would have been changed during the Quaternary until achieve its present characteristics. On the basis of the mapping carried out and analyzed, we also propose a classification for the ponds that caractherized the natural site of Fortaleza. Finally, we present the main morphological characteristics of the city, as well as the present situation of its relifs. Finalizing, we analyze the influence of the process of development in the degradation of those features, the factors and the effects of the pressure exercised by the society, the worry about the way this situation is developing, the need of thinking and rethinking these conditions, as well as the importance of the natural site of the city, not well known to their citizens, in its essence and dynamics.
Tily, Rachael. "Space, research objects, and interdisciplinarity in geomorphological inquiry." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:c8a8ffe6-a018-4696-817d-8f98df1d2d4d.
Повний текст джерелаMicallef, Aaron. "Failure processes in submarine landslides : a geomorphological approach." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/55502/.
Повний текст джерелаBelden, Deborah Jeanne. "Geomorphological mapping of the K2 area, Pakistan using GIS and remote sensing." Diss., [Missoula, Mont.] : The University of Montana, 2008. http://etd.lib.umt.edu/theses/available/etd-06112008-121208/.
Повний текст джерелаErlingsson, Ulf. "Geomorphological development of the bottoms off Österlen, southernmost Sweden." Uppsala, Sweden : Uppsala University, Dept. of Physical Geography, 1990. http://catalog.hathitrust.org/api/volumes/oclc/22874540.html.
Повний текст джерелаBrimicombe, A. J. "The application of geomorphological triangular databases in geotechnical engineering." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1985. http://hub.hku.hk/bib/B31207157.
Повний текст джерелаEntwistle, Neil Steven. "Geomorphological effectiveness and maintenance of a riffle-pool sequence." Thesis, University of Salford, 2011. http://usir.salford.ac.uk/26664/.
Повний текст джерелаHansen, Andrew. "Semi-automated geomorphological mapping applied to landslide hazard analysis." Thesis, Curtin University, 2007. http://hdl.handle.net/20.500.11937/504.
Повний текст джерелаHansen, Andrew. "Semi-automated geomorphological mapping applied to landslide hazard analysis." Curtin University of Technology, Dept. of Spatial Sciences, 2007. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=17998.
Повний текст джерелаModelling of synthetic landslides shows that Fast Fourier Transforms are an efficient method for removing noise, as produced by errors in measurement of individual DEM points, enabling diagnostic morphological terrain elements to be extracted. Component landforms within landslides are complex entities and conversion of the automatically-defined morphology into geomorphology was only achieved with manual interpretation; however, this interpretation was facilitated by softcopy-driven stereo viewing of the morphological entities across the hillsides.In the final case study of a large landslide within a man-made slope, landslide displacements were measured using a photogrammetric model consisting of 79 images captured with a helicopter-borne, hand-held, small format digital camera. Displacement vectors and a thematic geomorphological map were superimposed over an animated, 3D photo-textured model to aid non-stereo visualisation and communication of results.
Liddaman, Laura Claire. "Geospatial patterning and the hydro-geomorphological function of eroding peatland." Thesis, University of Manchester, 2009. https://www.research.manchester.ac.uk/portal/en/theses/geospatial-patterning-and-the-hydrogeomorphological-function-of-eroding-peatland(eff67576-3bac-4d8e-91a3-353af709f707).html.
Повний текст джерелаRichards, Danette Trudy Ward. "Geomorphological and environmental studies of karst, Northwest Nelson, New Zealand." Thesis, University of Canterbury. Geology, 2003. http://hdl.handle.net/10092/5560.
Повний текст джерелаCox, Thomas E. R. "Spatial and geomorphological analysis of mammoth localities in western Oklahoma." Thesis, Oklahoma State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1567304.
Повний текст джерелаUp until recently research on Paleoindian archaeology has focused on Clovis hunters and the demise of 35 genera of megafauna at the end of the Pleistocene. However, with increasing evidence of Pre-Clovis settlement many megafaunal sites older than Clovis are now under scrutiny. In this endeavor, geoarchaeology plays a key role, particularly with assessing the stratigraphic and geomorphological aspects of sites suspected of being Pre-Clovis. This Thesis looks at, and analyzes three mammoth sites in western Oklahoma; Helena, Grandfield, and Foss. These sites were analyzed on a geologic, geomorphologic, hydrologic, anthropologic, and soil pedogenic basis. Understanding of soils and their developmental processes can help give us a better understanding of the landscape and the environment in which they were formed. These sites were then compared to known sites Domebo, Hajny, and Burnham, all of which have had both an absolute date and an in depth soil analysis. The purpose of the comparison is to try and apply relative dating to a site when absolute dating is not obtainable, either due to funding, or technical issues that prevent obtaining a reliable date. It has been hypothesized that older mammoth finds should be found in higher terraces, while those of younger age, possibly with archaeological significance, should be found in lower terraces near flood plains. The three mammoth sites studied through this research are associated with lower terraces regardless of age. This example shows how complex the relationship is between site age and site distribution in the landscape. This research shows also how important is to evaluate soil development for estimating relative ages. This approach in turn is important for assessing late Pleistocene paleontological sites with potential association with Pre-Clovis human populations.
Adams, Beverley Joanne. "A geomorphological interpretation of saltmarsh channel network morphology and function." Thesis, University College London (University of London), 2001. http://discovery.ucl.ac.uk/1317552/.
Повний текст джерелаSkinner, Kevin Shaun. "Geomorphological post-project appraisal of river rehabilitation schemes in England." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324063.
Повний текст джерелаShen, Hsu-Min. "Geomorphological and tectonic controls on coastal erosion, Huatung, eastern Taiwan." Thesis, University College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271172.
Повний текст джерелаFreire, Francis. "Acoustic characterization of submarine geomorphological features in the Polar Oceans." Licentiate thesis, Stockholms universitet, Institutionen för geologiska vetenskaper, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-103370.
Повний текст джерелаUdugbezi, Emmanuel. "Evaluating interferometric synthetic aperture radar coherence for coastal geomorphological changes." Thesis, University of Dundee, 2018. https://discovery.dundee.ac.uk/en/studentTheses/b127af25-c290-4fdf-ac44-96c77449fb59.
Повний текст джерелаIida, Tomoyuki. "A stochastic hydro-geomorphological model for shallow landsliding due rainstorm." 京都大学 (Kyoto University), 1999. http://hdl.handle.net/2433/157184.
Повний текст джерелаKyoto University (京都大学)
0048
新制・論文博士
博士(理学)
乙第10072号
論理博第1351号
新制||理||1115(附属図書館)
UT51-99-G549
(主査)教授 奥西 一夫, 教授 千木良 雅弘, 教授 佐々 恭二
学位規則第4条第2項該当
Höfler, Veit, Christine Wessollek, and Pierre Karrasch. "Modelling prehistoric terrain Models using LiDAR-data: A geomorphological approach." SPIE, 2015. https://tud.qucosa.de/id/qucosa%3A35056.
Повний текст джерелаColton, Dan. "An archaeological and geomorphological survey of the Luangwa Valley, Zambia." Thesis, University of Liverpool, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494162.
Повний текст джерелаViola, D., and A. S. McEwen. "Geomorphological Evidence for Shallow Ice in the Southern Hemisphere of Mars." AMER GEOPHYSICAL UNION, 2018. http://hdl.handle.net/10150/627126.
Повний текст джерелаWillis, Ian Craig. "The hydrological context and geomorphological significance of glacier motion : Midtdlsbreen, Norway." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239090.
Повний текст джерелаDavis, Alexander M. "Geomorphological evolution of propagating fault tips in extensional and compressional settings." Thesis, Imperial College London, 2007. http://hdl.handle.net/10044/1/11992.
Повний текст джерелаJones, Arwyn Rhys. "Geomorphological mapping in arid environments using the Landsat Thematic Mapper data." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358274.
Повний текст джерелаD'Arcy, Mitchall. "Constraining landscape sensitivity to climate change using geomorphological and sedimentological approaches." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/28651.
Повний текст джерелаWalker, Gavin. "River channel response to flooding in western Scotland over the past 250 years." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262865.
Повний текст джерелаMattivi, Pietro. "Remote sensing and geomorphological data in support of precision agriculture and forestry." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Знайти повний текст джерелаGustavsson, Marcus. "Development of a Detailed Geomorphological Mapping System and GIS Geodatabase in Sweden." Doctoral thesis, Uppsala University, Department of Earth Sciences, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7222.
Повний текст джерелаThis thesis presents a method for detailed landscape presentation. The method incorporates both fieldwork-based comprehensive geomorphological description and digital data handling and thus contributes in filling the gap between traditional geomorphological mapping and modern geomorphological studies performed in Geographic Information Systems (GIS).
The main part of the thesis relates to development of a new detailed geomorphological mapping system, constructed to be easy to use and yet present a large amount of geomorphological information. The legend of the mapping system has successfully been applied to various types of landscapes, mapped at various scales between 1:5,000 and 1:50,000 without any modifications needed. The information presented in the map is based on simple descriptive criteria and thus the subjectivity is kept low, which enables a broad field of usage. In parallel with the mapping system a GIS-based geomorphological database has been developed. The structure and data presentation of the new mapping system allows for easy transformation of the data to form part of this database. The selected format of the GIS database is the ESRI ArcGIS®, Personal geodatabase.
In the development of the geomorphological mapping system four field areas have been mapped in central (Bonäs, Risa and Liden) and northern Sweden (Tarfala). In addition the new legend has been adapted to a field area situated in Vorarlberg, Austria (Upper Gamperdona valley).
In relation to the Tarfala field area an added issue of the project has been to give insights in the effects of physical and chemical weathering on various rock types to see if this can be detected in materials and landforms. The results from this study point at that resistance towards weathering vary among rocks even though they are of same rock type.
Lane, Natalie F. "The Geomorphological Development of the Cotswold Hills, southern England: A Tectonic Perspective." Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487281.
Повний текст джерелаEriksson, Bert. "The zoo-geomorphological impact of fossorial rodents in sub-polar alpine environments." Licentiate thesis, Uppsala universitet, Kulturgeografiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-150807.
Повний текст джерелаToone, Julia. "Geomorphological discontinuities and ecological organisation : a case study of the River Drôme." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/6620.
Повний текст джерелаHasan, Abed M. T. "The geomorphological history of the Gebel Al Akhdar valleys, North-eastern Libya." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243772.
Повний текст джерелаStyles, Jonathan. "The application of stereoscopic SPOT-HRV data and DEMs to geomorphological mapping." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292712.
Повний текст джерелаPINTO, RODRIGO WAGNER PAIXAO. "GEOMORPHOLOGICAL LANDSCAPE EVOLUTION OF THE GRANDE RIVER: DISSECTION DYNAMICS AND DRAINAGE CAPTURE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=27097@1.
Повний текст джерелаCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
A análise dos sistemas fluviais são de extrema importância na compreensão da evolução geomorfológica da paisagem, pois possuem características, seja no seu arranjo ou distribuição dos canais, que permitem elaborar os episódios que ocorreram ao longo do tempo. A quebra do continente Gondwana e seus múltiplos eventos até a consolidação do Rift Continental do Sudeste (RCS) implicou em uma mudança significativa no relevo sudeste e, consequentemente, nos sistemas de drenagens. Isto promoveu a reorganização dos sistemas de drenagens e uma nova dinâmica hidro-erosiva pelo rebaixado do nível de base na porção leste do continente com a consolidação do RCS. Diante do exposto, selecionou-se como estudo de caso a bacia do Rio Grande no Rio de Janeiro com o objetivo principal de entender o processo de evolução geomorfológica da bacia, a partir da organização da rede de drenagem e feições elementares da bacia frente aos eventos geológicos de formação e estruturação do substrato rochoso. A metodologia utilizada se baseia em trabalhos de gabinete, de campo e posterior análise dos dados gerados. Estes procedimentos visaram compreender a evolução do relevo na bacia do Rio Grande com base na correlação entre aspectos geológicos e geomorfológicos na organização do seu sistema fluvial. Pode-se inferir que a evolução geomorfológica da bacia do Rio Grande foi influenciada pelos múltiplos eventos tectônicos até a consolidação do RCS. Os dados demonstram forte controle do substrato rochoso na morfologia do relevo e na orientação da rede de drenagem. Os resultados das orientações dos fluxos de drenagem demonstram grande quantidade de rios nas orientações NE e NW. Acredita-se que a região correspondeu a um extenso planalto de altitude mais elevada que a atual, e sistema fluvial com direção predominante para noroeste/norte. A evolução da bacia do Rio Grande se deu através do avanço das drenagens atlânticas sobre o antigo Planalto Sudeste, através da erosão remontante e controladas pelo nível de base.
Analysis of river systems are very important in understanding the geomorphological evolution of the landscape because they have characteristics, either in your arrangement or distribution channels, which enable the development of the episodes that have occurred over time. The break of the Gondwana Continent and its many events to the consolidation of Southeast Continental Rift resulted in a significant change in Southeast relief and hence the drainage systems. This promoted the reorganization of drainage systems and a new hydro-erosive dynamic by lowered the base level in the eastern portion of the continent with the consolidation of the Cenozoic RCS. Given the above, it was selected as a case study the basin of the Grande River in Rio de Janeiro with the main objective to understand the process of geomorphological evolution of the basin, from the drainage network organization and basic features of the front basin to events geological formation and structure of the bedrock. The methodology is based on office work, field and subsequent analysis of the data generated. These procedures were aimed at understanding the evolution of relief in the Rio Grande basin based on the correlation between geological and geomorphological aspects of the organization of its river system. It can be inferred that the geomorphological evolution of the Grande River basin was influenced by multiple tectonic events to the consolidation of RCS. The data demonstrate strong control of bedrock in relief morphology and orientation of the drainage system. The results of the guidelines of drainage flows demonstrate large number of rivers in the NE and NW directions. It is believed that the region corresponded to an extensive plateau higher than the current altitude, and river system with predominant direction north-west / north. The evolution of the Rio Grande basin was through the advancement of the Atlantic drainages on the old Plateau Southeast, through remontant erosion and controlled by the basic level.
Gorney, Rebecca Michelle. "The Geomorphological and Ecological Conditions of a Lower Midwestern Coldwater Stream System." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1213101699.
Повний текст джерелаCabral, Mariza Castanheira de Moura da Costa. "Effects of spatial constraints on channel network topology : implications for geomorphological inference /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/10147.
Повний текст джерелаEbert, Karin. "Cenozoic landscape evolution in northern Sweden : geomorphological interpretation within a GIS-framework /." Stockholm : Department of Physical Geography and Quaternary Geology, Stockholm University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-30711.
Повний текст джерелаAt the time of the doctoral defence, the following papers were unpublished and had a status as follows: Paper 2: In press. Paper 3: Manuscript. Paper 4: Manuscript. Härtill 4 uppsatser.
May, Jan-Hendrik. "Late quaternary paleoenvironments of Eastern Bolivia deduced from geomorphological and paleopedological archives /." [S.l.] : [s.n.], 2007. http://www.zb.unibe.ch/download/eldiss/07may_j.pdf.
Повний текст джерелаRocheford, Mary Kathryn. "Determining geomorphological and land use effects through physico-chemical fingerprinting of soils." Diss., University of Iowa, 2014. https://ir.uiowa.edu/etd/4735.
Повний текст джерелаBeck, Tanya M. "Tracking Sediment Bypassing, Geomorphological Analysis, and Regional Sediment Management at Tidal Inlets." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7741.
Повний текст джерелаO'Connor, Shoshannah. "A geomorphological study of the South Wellesley Islands, southern Gulf of Carpentaria." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/101891/4/Shoshannah_O%2527Connor_Thesis.pdf.
Повний текст джерелаShafei, Afshin. "Geomorphological characterization of fluvial flood hazard across the island of Oahu, Hawaii (USA)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Знайти повний текст джерелаLobera, Galán Gemma. "Eco-geomorphological dynamics in contrasting Mediterranean rivers with different degrees of flow regulation." Doctoral thesis, Universitat de Lleida, 2017. http://hdl.handle.net/10803/401455.
Повний текст джерелаEsta tesis analiza el efecto de las presas sobre el régimen de caudales, el transporte de sedimentos, la morfología y la movilidad del cauce, y la comunidad de macroinvertebrados en ríos Mediterráneos de la Península Ibérica a diferentes escalas espacio-temporales. A gran escala espacio-temporal, los resultados muestran una reducción generalizada de la magnitud y la frecuencia de las crecidas que, juntamente con la reducción del suministro de sedimentos, produce una pérdida de barras que son ocupadas por la vegetación, hecho que estabiliza el cauce fluvial, limitando el dinamismo del lecho del río y puede contribuir a la degradación del ecosistema fluvial. En pequeña escala (los ríos Ésera y Siurana) se comprueba que los embalses retienen hasta el 90% de la carga de sedimentos en suspensión, aunque la aportación hídrica solo se reduce en Ésera. En los tramos de aguas arriba, las partículas del lecho son movilizadas frecuentemente y se observan cambios morfológicos después de cada crecida, mientras que los tramos de aguas abajo se mantienen estables. En el Siurana, estos cambios provocan diferencias significativas en la composición taxonómica de los macroinvertebrados en el Siurana, aunque la riqueza de especies se mantiene prácticamente intacta. Por otro lado, la densidad y la biomasa aumentan aguas abajo pero la biodiversidad disminuye. La tesis describe y cuantifica cambios en la estructura bio-física y el funcionamiento del ecosistema fluvial en ríos Mediterráneos regulados y proporciona información inédita en el campo de la Eco-Geomorfología.
The effects of dams on river flow regimes, sediment transport, channel morphology, bed mobility and macroinvertebrate communities were studied in Mediterranean rivers of the Iberian Peninsula at multiple temporal and spatial scales. At the large spatio-temporal scales, results show that regulation changes their flow regimes, with a generalized reduction in flood magnitude and frequency. This, in addition to the decrease in downstream sediment supply, results in the loss of active bars as they are encroached by vegetation (channel stabilization). Geomorphic stabilization limits riverchannel dynamics and may contribute to the environmental degradation of the fluvial ecosystem. At the small scale (the Ésera and the Siurana rivers), the reservoirs trap up to 90% of the suspended load, although total runoff is only reduced in the Ésera. In the upstream reaches, riverbed material is frequently entrained and morphological changes were observed following floods, while the downstream reaches were stables. In the Siurana, damming causes significant differences in taxonomic composition of the benthic invertebrate communities, but the species richness remained almost the same. Density and biomass increase notably below the dam although diversity decreases. The thesis describes and quantifies changes on the bio-physical structure and functioning of the fluvial ecosystem in dammed Mediterranean rivers and provides comprehensive insights in the field of the Eco-Geomorphology.
Dunham, Mark Neville Edward. "The geomorphological nature and age of the linear escarpments of northeastern Eyre Peninsula /." Adelaide, 1992. http://web4.library.adelaide.edu.au/theses/09SB/09sbd917.pdf.
Повний текст джерелаOn title page : "National Grid reference S1-53 6331 and 6332 1 : 100 000 series. Includes bibliographical references (leaves 40-43).