Дисертації з теми "Debris morphology"
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Gardner, David John. "Hypervelocity impact morphology." Thesis, University of Kent, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294316.
Повний текст джерелаWilson, Jessica. "The Efficacy and Design of Coastal Protection Using Large Woody Debris." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/41573.
Повний текст джерелаPenserini, Brian. "Debris Flow Network Morphology and a New Erosion Rate Proxy for Steepland Basins with Application to the Oregon Coast Range and Cascadia Subduction Zone." Thesis, University of Oregon, 2015. http://hdl.handle.net/1794/19276.
Повний текст джерелаIllgner, Peter Mark. "The morphology and sedimentology of two unconsolidated quaternary debris slope deposits in the Alexandria district, Cape Province." Thesis, Rhodes University, 1995. http://hdl.handle.net/10962/d1005519.
Повний текст джерелаDiefenderfer, Heida Lin. "Channel morphology and restoration of Sitka spruce (Picea stichensis) tidal forested wetlands, Columbia River, U.S.A. /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/5565.
Повний текст джерелаGartner, Joseph E. "Relations between wildfire related debris-flow volumes and basin morphology, burn severity, material properties and triggering storm rainfall." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/cr/colorado/fullcit?p1430198.
Повний текст джерелаClark, Chase. "THE IMPACTS OF LOGGING WITH CURRENT AND MODIFIED BEST MANAGEMENT PRACTICES ON WATERSHED CHARACTERISTICS IN EASTERN KENTUCKY." UKnowledge, 2015. http://uknowledge.uky.edu/forestry_etds/25.
Повний текст джерелаPecorari, Eliana. "Il materiale legnoso in corsi d'acqua a canali intrecciati: volumi, mobilità , degradazione ed influenza morfologica." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425189.
Повний текст джерелаBinda, Andrey Luis. "A influência de detritos lenhosos na morfologia e na sedimentologia de leito no rio Guabiroba, Guarapuava - Pr." Universidade Estadual do Oeste do Parana, 2009. http://tede.unioeste.br:8080/tede/handle/tede/86.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
Trees, twigs and leaves fallen inside of the channel, form a significant component of the fluvial environment and natural occurrence in fluvial systems that cut forested areas. All these vegetal materials that are found inside of the channel are called wood debris. The wood debris play a key function in the ecology and geomorphology of channels, being able to affect the processes of the channels in an ample reach: since the hydraulic roughness, retention and sized grain of bed sediments, until the creation of steps and pools, being able to the times to control the standard of the channel and distance and/variation of fluvial features that are basic for the formation of aquatic habitat. In this context, the present research had as objective, to verify the influence of accumulations of wood debris on the morphology and sedimentology of stream bed in the river Guabiroba, Guarapuava, Center-South of the Paraná. The used techniques had included: installation of permanent transversal profiles (to the upstream and downstream of the accumulations) and sections of batimetric measurement, survey of the longitudinal profile and grain sized characterization of bed sediments. The measurement was carried throughout 15 months (December of 2007 the March of 2009) in four sections located in the main course of the river. The rainfall during the measurement allowed to particularizing the occurrence of only one period with rains above average (3 - 4ª Campaign). The results indicate the occurrence of sedimentation in the second and fifth measurement and processes of erosion in the third and fourth measurement. These processes erosive-depositional can in part be attributed to the pluviometric regime, with the periods of high entailed concentration of rains to the erosion of the stream bed and periods of related scarce and not concentrated rains with the deposition of sediments. The analysis of the data allows to establish some consideration: 1) predominance of processes of erosion in the sections of batimetric measurement; 2) bigger rate deposition in downstream cross-sectional profiles of the accumulations; 3) predominance of coarser sediments (gravel medium - sand very coarse) to upstream and finer sediments (gravel fine - sand medium) to downstream; 4) bigger diversity of depths in the immediacy of the accumulations; 5) establishment of riffles by the forced deposition of sediments and pools for the scour of the stream bed.
Árvores, galhos e folhas caídos dentro do canal formam um significativo componente do ambiente fluvial e de ocorrência natural em sistemas fluviais que cortam áreas florestadas. Toda essa carga de material de origem vegetal que se encontra dentro do canal é chamada de detritos lenhosos. Os detritos lenhosos desempenham função chave na ecologia e geomorfologia de canais, podendo afetar os processos do canal em um amplo alcance: desde a rugosidade hidráulica, retenção e grânulometria dos sedimentos de leito, até a criação de degraus e depressões, podendo, às vezes, controlar o padrão do canal e a distância/variação de feições fluviais que são fundamentais para a formação de habitat aquáticos. Num contexto desses, a presente pesquisa teve como objetivo verificar a influência de acumulações de detritos lenhosos sobre a morfologia e a sedimentologia de leito no Rio Guabiroba, município de Guarapuava, mesorregião Centro-Sul do Paraná. As técnicas utilizadas incluíram: instalação de perfis transversais permanentes (a montante e a jusante das acumulações) e seções de monitoramento batimétrico, levantamento do perfil longitudinal e caracterização grânulométrica de sedimentos do fundo. O monitoramento foi realizado ao longo de 15 meses (dezembro de 2007 a março de 2009) em quatro pontos localizados em dois trechos no curso principal do rio. A pluviosidade durante o monitoramento permitiu individualizar a ocorrência de apenas um período com chuvas acima da média (3ª a 4ª campanha). Os resultados indicam a ocorrência de sedimentação na segunda e quinta campanhas e processos de erosão na terceira e quarta campanhas. Esses processos erosivo-deposicionais podem, em parte, ser atribuídos ao regime pluviométrico, com os períodos de alta concentração de chuvas vinculados à erosão do leito e períodos de chuvas escassas e não concentradas relacionados com a deposição de sedimentos. A análise dos dados permite estabelecer algumas considerações: 1) predominância de processos de erosão nas seções de monitoramento batimétrico (Blocos 3D); 2) maior taxa de deposição nos perfis transversais situados a jusante das acumulações; 3) predomínio de sedimentos mais grossos (seixo médio - areia muito grossa) a montante da acumulação do que a jusante (seixo fino - areia média); 4) maior diversidade de profundidades nas imediações das acumulações; 5) estabelecimento de soleiras pela deposição forçada de sedimentos e depressões pela escavação do leito.
Koulinski, Vincent. "Etude de la formation d'un lit torrentiel par confrontation d'essais sur modèle réduit et d'observations de terrain." Grenoble 1, 1993. http://www.theses.fr/1993GRE10211.
Повний текст джерелаPaguican, Engielle Mae. "La structure, morphologie, et texture superficielle des dépôts d'avalanche de débris : cartographie de terrain, par télédétection et par modélisation analogique." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00794267.
Повний текст джерелаRobison, E. George. "Large woody debris and channel morphology of undisturbed streams in southeast Alaska /." 1987. http://hdl.handle.net/1957/9757.
Повний текст джерелаHuang, Chien-Lin, and 黃建霖. "Debris Fan Morphology Measured in the Lab and Field Using Digital Photogrammetry." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/12820944634197382007.
Повний текст джерела國立臺灣大學
土木工程學研究所
102
The aim of this thesis is to investigate the morphology of debris fan by conduct a field survey in Pu-Tun-Pu-Nas River debris fan of Laonong River and experiment observation with the Photogrammetry survey method. Aerial UAV Photogrammetry survey with ground controlled marker target can bring high quality digital surface model in a parity cost. Designed mirror array build in laboratory can provide stereo images for reconstruct experiment debris fan topography. Two experiment conditions are adopted to simulate fluvial fan and mudflow formed composition pattern. These two formation pattern might be possible in the field according to the comparison result between field and experiment. The result of experiment shows these two experiments might reach a dynamic equilibrium elevation in late stage from an initial stage of elevation growth.
Chen, Chia-Huang, and 陳佳璜. "The Influence of Large Wood Debris Movement on River Morphology in a Flume Experiment." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/76974205558958218404.
Повний текст джерела國立中興大學
水土保持學系所
97
The typhoons induce disasters of landslides and debris flow, bringing amount of large woody debris (LWD) which blocked the river and affected the flood expellant, and water supply in Taiwan. According to above results, the government has focused on the problem of LWD seriously. There are three main functions for LWD in a river: (1) To intercept the sediment on the river bed. (2) To block and separate the water flow. (3) To stabilize the river bank and lessen the scour. Above all, this experiment conducts the scour depth and sediment export of channel river bed with or without LWD in the channel. We explore the river patterns of the inter-relationship with the LWD, and analyse the LWD’s deposition pattern and speed in different channels. Results indicate that LWD within the channel not only block and separate the flow effectively, but also change the river morphology. Because LWD which reduse the water flow could lessen the scour on river bed, and induse the bars formed of LWDs downstream side. LWD jam was accumulated by LWDs. Pools and Bars are formed in the LWD jam’s upstream and downstream. It could provide habitats for aquatic organisms, and increase the overall biodiversity of the river. In the deposition patterns, LWD parallel to the water has the highest percentage, followed by oblique, and finally for the perpendicular. When the ratio of channel width and LWD length is less than 0.5, the longer the higher proportion of the deposition of the LWD is parallel to water. When the ratio is greater than 0.5, the LWD is easier to deposit perpendicular to the flow. The size of the LWD diameter to the deposition pattern has no significant relationship. Moving speed is inversely proportional with the LWD lenth; the size of the LWD diameter to the moving speed has no significant relationship. LWD jam will be more effective in blocking the LWD from the upstream, and reduce the moving speed of LWD. And LWD could stably deposit in oblique or perpendicular to flow when LWD were accumulated.
Hung, Chi-Yao, and 洪啟耀. "Relation between Debris Flow Rheology and Fan Deposit Morphology Investigated Using Small-scale Experiments." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/00688807484432710507.
Повний текст джерела國立臺灣大學
土木工程學研究所
99
The aim of this thesis is to understand the relationship between rheology and morphology for debris flow going from a narrow valley to a fan. In micro-scale experiments, Kaolinite, black sand and water are mixed to represent debris flows of high viscosity. We change two parameters which are water content and the coarse particle content to observe variation in debris flow behavior due to changes in composition. To measure the fast flow and rapid deformation of the flow surface, a fast scan method using a high speed camera and rotating laser are developed. The results of the experiments are analyzed in two parts, one is channel flow behavior and another is the canyon-fan transition. In channelized results beside compare the experiments, we use kinematic wave to simulate the surge process in channel, and compare the cross section in field. At the canyon-fan transition, debris flow deposit in two stages. In the first stage, a high speed front advance on to fan. In the second stage, the slower tail tends to spread laterally. Increasing water content and decreasing coarse particle content makes the first stage longer and the second stage shorter. As a result, lateral deposits are few pronounced. Finally, the experimental results are compared with field observations.
Chou, Chia-Hsien, and 周佳賢. "An Experimental Study of Single Large Woody Debris Structure on the Change of Channel Morphology." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/81189270173320739112.
Повний текст джерела逢甲大學
水利工程所
93
Even the flow deflector structures are useful on controlling channel banks erosion, the safety and its stability of the non-concrete deflector constructed by natural materials are still the major concerns for engineers and residents in Taiwan. Focused on the single flow deflector made of woody debris, this study tries to find the better structure configuration for considering the needs in structure safety, erosion control, and habitat enhancement through model experiments on concrete groyne, deflector log, and large woody debris. The flume experiments are undertaken with different experiment conditions of flow discharge, sediment composition, and channel slope. The experimental results indicated that the large woody debris is good at bulwark ability, channel steady and variety of habitat enhancement. The deflector log has good ability of variety of habitat enhancement in low flow discharge. As flow discharge increases, the concrete groyne and large woody debris perform better in variety of habitat enhancement and diversity. In structure safety, the concrete groyne and large woody debris are the better structures in bulwark ability while the flow energy increases. For these three structures, the large woody debris is the best structure in safety and habitat enhancement, while deflector log is concluded as the worst one.
Morris, Christopher M. "The impact of historic logging on woody debris distribution and stream morphology in the Great Smoky Mountains National Park, North Carolina-Tennessee." 2008. http://etd.utk.edu/2008/MorrisChris.pdf.
Повний текст джерелаKřížová, Lenka. "Exoskopický standard sedimentů glacigenních akumulačních forem reliéfu." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-295906.
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