Global ETD Search

1	The Relationship Between the Foreshore Slope, Grain Size and Wave Height Lindley, Louise Violet 10 April 1987 (has links) This research paper was submitted to the Department of Geography in fulfillment of the requirements of Geography 4C6. / This study reports on the relationship between the foreshore slopes, grain size characteristics and the wave height on the Hamilton-Burlington Beach. This beach is a non-tidal, low-energy beach. At five stations along the beach, profiles were taken, sediment samples were collected and the average wave heights determined. The slopes were plotted against the mean grain size, the median grain size and the wave heights. There was no clear relationship between the variables tested. It was determined, however, that there existed three areas along this beach. The first area was he one affected only by the wave energy, the second are was affected by both the wave energy and the grain size characteristics, and the third region was affected by the grain size characteristics. / Thesis / Bachelor of Arts (BA) foreshore slope grain size Hamilton-Burlington beach wave energy
2	Off-Road Vehicle Impact on Sediment Displacement and Disruption at Assateague Island National Seashore, Maryland Labude, Brian 14 March 2013 (has links) The National Park Service (NPS) monitors off-road vehicle (ORV) use in National Seashores across the United States. The sediment disturbance that is caused by ORVs is believed to have a large impact on erosion (by wind or waves), which there by affects the morphology of the foredunes. With greater knowledge of ORV impacts, the NPS can better manage ORV use and minimize anthropogenic affects to the coastal environment. There remains considerable uncertainty about the disturbance and its larger-scale impact. This study quantifies the sediment disturbance made by tire tracks, as well as the tire track form, width, depth, and evolution with relation to the number of vehicle passes and location on the beach at Assateague Island National Seashore (ASIS), Maryland. To measure ORV impact, ground-based LiDAR was used to collect detailed profiles across a three by three meter test plot at each site. Based on the quantification of the displaced sediment and redistribution of that sediment from the tracks, a recommendation to the NPS can be made as to where along the beach traffic should be limited to, in order to minimize impact to the physical environment at ASIS. Tire tracks were found to widen after the first pass, as a result of the imperfections of driving. Compaction of the sediment in the center of the tire track accounts for only a minimal amount of the sediment lost from the tire tracks. Sediment removal accounted for greater than 75% of the sediment lost from the tire tracks at all sites. It was concluded that sediment removal is the most dominant factor in the creation and evolution of a tire track. The width, depth, and evolution of a tire track were also found to be controlled by the imperfections of driving. Despite the amount of sediment disturbance, it is found that there is no net downslope displacement of sediment. This conclusion counters previous ORV impact studies and suggests that ORVs are not directly responsible for beach erosion. It is also recommended that to minimize the impact of OVRs on the beach at ASIS, the NPS should limit driving to the backshore. Backshore Foreshore Impact Tire Track Erosion Sediment displacement Assateague Island ORV Off-road vehicle
3	Pollutant advective spreading in beach sand exposed to high-energy tides Itugha, O.D., Chen, D., Guo, Yakun 13 August 2016 (has links) yes / This paper presents field measurements in which dye solute was injected into coastal sand to investigate contaminant advection in intertidal beach sand. The measurements show the pathways of a contaminated plume in the unsaturated zone during both the flood and ebb tides. A prescribed amount of dye tracer solution was directly injected through the topsoil, with average porosity 0.3521±0.01, at predetermined locations of the River Mersey’s outer estuarial beach during ebb-tide. The injected dye was monitored, sampled and photographed over several tidal cycles. The distinctive features of the plume (full two dimensional cross-sections), sediments and water-table depth were sampled in-situ, close to the injection point (differing from previous contaminant monitoring tests in aquifers). The advective movement is attributed to tidal impact which is different from contaminant transport in aquifers. The experimental results show that plumes have significantly large spatial variability, diverging upwards and converging downwards, with a conical geometric shape which is different from the usual spherical/elliptical shape reported in literature. The mean vertical motion of the plume reaches three times the top-width within ten tidal cycles, exceeding the narrow bottom-width by a factor of order 2. The observed transport features of the plume within the beach sand have significant relevance to saltwater intrusion, surface water and groundwater quality. The field observations are unique and can serve as a valuable benchmark database for relevant numerical studies. / China Ministry of Science and Technology 973 program (2014CB745001), Special Program of future development in Shenzhen (201411201645511650) and Shenzhen Key Laboratory for Coastal Ocean Dynamic and Environment（ZDSY20130402163735964).
4	A deriva litorânea e suas implicações na gênese e orientação de barreiras arenosas pleistocênicas (região de Osório), Estado do Rio Grande do Sul, sul do Brasil Carassai, Julierme Justin 03 May 2013 (has links) Submitted by William Justo Figueiro (williamjf) on 2015-08-05T19:14:27Z No. of bitstreams: 1 39d.pdf: 18221869 bytes, checksum: 927f68bde4d52da7f5c91a586fcb87f2 (MD5) / Made available in DSpace on 2015-08-05T19:14:27Z (GMT). No. of bitstreams: 1 39d.pdf: 18221869 bytes, checksum: 927f68bde4d52da7f5c91a586fcb87f2 (MD5) Previous issue date: 2013-05-03 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / CNPQ – Conselho Nacional de Desenvolvimento Científico e Tecnológico / A região costeira do Estado do Rio Grande do Sul é constituída por uma extensa faixa de terras baixas e arenosas dominadas pela ação de ondas, deriva litorânea e demais correntes induzidas por ondas, além da forte ação do vento. O presente estudo teve por objetivo relacionar e detalhar a dinâmica de formação de um antigo ambiente praial localizado em áreas de duas jazidas de areia no município de Osório (RS). A região está inserida na parte norte da Planície Costeira do Rio Grande do Sul, no Sistema Barreira III, de idade pleistocênica (120 a 125 ka). Este sistema contém depósitos de foreshore e shoreface recobertos por sedimentos eólicos. Na região, há um registro significativo de estruturas sedimentares biogênicas marinhas e não marinhas que permitiram demarcar com clareza os depósitos praiais. Além da análise de fácies e processos sedimentares, os dados de paleocorrentes permitiram inferir a paleolinha de praia da Barreira III na região de Osório (RS), traçando um comparativo com o atual regime de ondas, correntes e ventos que atuam na região litorânea do Estado do Rio Grande do Sul. / The coastal region of Rio Grande do Sul consists of a long track of low and sandy dominated by the action of waves, littoral drift and other currents induced by waves as well as the wind strong action. The present study had the objective of relating and specifying the formation dynamics of an ancient beach environment located in the area of two sand mines in the two of Osório, in Rio Grande do Sul. The region is inside the north part of the Coastal Plain of Rio Grande do Sul (Planície Costeira do RS), in Barrier System III, of pleistocenic age (120 to 125 ky). This system contains foreshore and shoreface deposits covered by eolian sediments. In the region, there is a significant register of marine and non-marine biogenic sedimentar strutures that allowed to mark clearly the marine deposits. Besides the analysis of facies and sedimentary processes, paleocurrent data allow infer the beach paleoline of Barrier III in the region of Osório (RS), making a comparison with the present regime of waves, currents and winds that act in the coastal region of Rio Grande do Sul. Ophiomorpha Paleocorrentes Planície Costeira do Rio Grande do Sul Foreshore Shoreface Paleocurrents Rio Grande do Sul coastal plain
5	Turning the tide: clams and colonialism in the Salish Sea, 1925-1994 Lyall, Gordon Robert 28 April 2022 (has links) Featuring an ethnohistory of two Coast Salish communities — the Suquamish Tribe in Washington State and the W̱SÁNEĆ Nation in British Columbia — this dissertation is a transborder study of Indigenous shellfish harvesting and foreshore rights in the Salish Sea across the twentieth century. It explores the history of the interface between land and sea within the context of treaty rights to resources and Indigenous nations’ sovereignty over marine habitats. This study also turns the ethnographic lens on the settler population. Using tools offered by recent scholarship on settler colonialism, it helps explain why the general public has resisted treaty and Aboriginal rights to fisheries and other resources. This dissertation also reveals Coast Salish nations’ responses to settler encroachment of their foreshores and state disruption of their management of the marine environment throughout the twentieth century and offers two community studies to illustrate how local Indigenous communities have re-shaped relationships between Indigenous peoples and settlers on the Salish Sea. The first study examines Suquamish’s right to shellfish under the Point Elliott Treaty and affirmed by the 1994 Rafeedie decision, as well as the interrelated 1980s tidelands case for ownership of the beaches attached to the Port Madison Reservation. The second examines W̱SÁNEĆ people’s defense of Saanichton Bay from a marina development, when the SȾÁ,UTW̱ (Tsawout) community wielded its Douglas Treaty rights in Claxton v. Saanichton Marina, 1987. Utilising Karl Jacoby’s concept of a “moral ecology,” this study argues that by ignoring Indigenous Knowledge regarding marine resource management, and by creating an overly complex regulatory scheme guided by principles of capitalism, settler officials on both sides of the border missed opportunities to avoid some of the greatest challenges to marine health and resource survival in the Salish Sea. / Graduate / 2023-04-12 Colonialism Shellfish Foreshore Tidelands Coast Salish Nations British Columbia Washington State Fisheries Boldt Decision Claxton v. Saanichton Marina Treaties Douglas Treaties Point Elliott Treaty
6	The confiscation of Pare Hauraki: The impact of Te Ao Pākehā on the Iwi of Pare Hauraki Māori; on the whenua of Pare Hauraki 1835-1997 and The Foreshore and Seabed Act 2004 / Te raupatutanga o Pare Hauraki Peters, Murray Hamaka January 2007 (has links) Kia mau ki te rangatiratanga o te Iwi o Hauraki Just as the whakataukī explains Hold fast to the power and authority of the Hauraki tribes the focus of this study is to examine and evaluate the impact of Te Ao Pākehā on Pare Hauraki lands and Tīkapa Moana under the mana of Pare Hauraki Māori and Pare Hauraki tikanga. The iwi of Pare Hauraki have land claims through the, (Wai 100) and the Hauraki Māori Trust Board, before the Waitangi Tribunal highlighting whenua issues and their impact on Pare Hauraki iwi. Also relevant is the foreshore and seabed issue which is documented leading on to the infamous Foreshore and Seabed Act 2004, (for Māori anyway), sparking widespread opposition by Māori throughout the country, and other supportive non-Māori groups because of the issue concerning Māori kaitiiakitanga and guardianship roles. This investigation will commence by outlining the histories of discovery and settlement of Pare Hauraki, the concept of mana-whenua/mana-moana as it applies to Pare Hauraki Māori and our tikanga, and then to subsequent issues leading to land alienation of the early 19th to late 20th cenutries and then to the foreshore issue of the early 21st Century. This research will include information showing that before 1840 to Te Tiriti o Waitangi and thereafter that Pākehā and various Crown agents, through legislation claimed the rights to the lands, waterways and oceanic areas under the kaitiakitanga of my tupuna of Pare Hauraki. Tupuna and other iwi members have expressed their disgust seeing the mana of their traditional lands, waterways, oceanic areas and kaitiaki roles slipping away from them through these activities. Therefore, this thesis is a response to those issues and the impact on (a), Māori as a people, and our tikanga Māori and (b), Pare Hauraki Māori as the kaitiaki/guardians of the Pare Hauraki rohe/territory in accordance with tikanga Māori, and the significance of the responsibilities which arise out of the Māori concepts of kaitiakitanga, manaakitanga and rangatiratanga. Maori Treaty of Waitangi Declaration of Independence Foreshore Seabed Water Human Rights United Nations Waitangi Tribunal Tupua Taniwha Deity Waka Tupuna Ancestor Moana Whakapapa Tikanga History Iwi Marutuahu Tainui Tribe Hapu Subtribe Land Alienation Confiscation Raupatu Crown Law Pakeha English Aotearoa New Zealand Captain Cook Taraia Tukukino Horeta Te Taniwha Tanumeha Te Moananui Tikapa Coromandel Tinorangatiratanga

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