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Tesis sobre el tema "Dredges"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Glover, Gordon Jason. "Laboratory modeling of hydraulic dredges and design of dredge carriage for laboratory facility : a thesis." Thesis, Monterey, California. Naval Postgraduate School, 2002. http://hdl.handle.net/10945/3051.

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The deepening and maintenance of the world's ports and navigable waterways has been an integral part of the world economy for centuries. In recent years, cutterhead and draghead hydraulic suction dredges have performed a majority of the dredging work. The ongoing design and testing of hydraulic dredges is important for maintaining efficient dredging operations within the limits set by increasing environmental regulations. The high cost of building and operating a hydraulic dredge makes field testing of full-scale prototypes very expensive and time consuming. Moreover, the testing conditi

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2

Adair, Robert Fletcher. "Estimating production and cost for clamshell mechanical dredges." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/1536.

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Clamshell dredges are used around the United States for both navigational and environmental dredging projects. Clamshell dredges are extremely mobile and can excavate sediment over a wide range of depths. The object of this thesis is to develop a methodology for production and cost estimation for clamshell dredge projects. There are current methods of predicting clamshell dredge production which rely on production curves and constant cycle times. This thesis calculates production estimation by predicting cycle time which is the time required to complete one dredge cycle. By varying the cycle t

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3

Milleville, Kelli A. "Twine-Top Modifications of Sea-Scallop Dredges: Reducing Yellowtail-Flounder Bycatch." W&M ScholarWorks, 2008. https://scholarworks.wm.edu/etd/1539617874.

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4

Rudders, David B. "A Comparison of Size Selectivity and Relative Efficiency of Sea Scallop Trawls and Dredges." W&M ScholarWorks, 1999. https://scholarworks.wm.edu/etd/1539617978.

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5

Marquardt, Lisa [Verfasser]. "Looking Beyond The Dredges : The Consideration of Alternatives in the Planning and Approval of Port Development in Germany and New Zealand / Lisa Marquardt." Baden-Baden : Nomos Verlagsgesellschaft mbH & Co. KG, 2014. http://d-nb.info/1107604052/34.

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6

Jakku, Emma, and n/a. "Murky Waters? Science, Politics and Environmental Decision-Making in the Brisbane River Dredging Dispute." Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040810.131650.

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Environmental sociology and the sociology of scientific knowledge provide a strong theoretical foundation for investigating the role of science in environmental disputes. The field of environmental dispute resolution has built a body of literature, outlining the techniques and practices that underpin the successful resolution of disputes, over controversial environmental issues. However, the literature on dispute resolution has generally neglected the role of science in environmental disputes. This thesis develops a theoretical framework based on concepts from environmental sociology and th

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7

Jakku, Emma. "Murky Waters? Science, Politics and Environmental Decision-Making in the Brisbane River Dredging Dispute." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/366055.

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Environmental sociology and the sociology of scientific knowledge provide a strong theoretical foundation for investigating the role of science in environmental disputes. The field of environmental dispute resolution has built a body of literature, outlining the techniques and practices that underpin the successful resolution of disputes, over controversial environmental issues. However, the literature on dispute resolution has generally neglected the role of science in environmental disputes. This thesis develops a theoretical framework based on concepts from environmental sociology and th

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8

Gurriet, Philippe C. (Philippe Charles). "Geochemistry of Hawaiian dredged lavas." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/54327.

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9

Hossain, Abdul Siddik. "Improvement of Dredged Sediments : A laboratory study on dredged sediments with different types of binders." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65019.

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tabilization and solidification (S/S) technique have been the most frequently used method for dredgedsediment improvement in Sweden and worldwide. As dredging activities are essential for safe navigationof ships and vessels that may processes harmful substances or organic pollutants to causecontamination of the surrounding environment. Stabilization/solidification technology has beenidentified as the most beneficial handling strategy for contaminated dredged sediments and treatedstabilized materials can be used in civil engineering applications (e.g. backfill or embankment). This (S/S)techniqu

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10

Smith, Stanley Jarrell II. "Fine Sediment Dynamics in Dredge Plumes." W&M ScholarWorks, 2011. https://scholarworks.wm.edu/etd/1539616859.

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The research presented in this study is motivated by the need to improve predictions of transport and fate of cohesive sediments suspended during dredging operations. Two techniques are presented to quantify vertical sediment flux within dredge plumes. A mass-balance approach using an Acoustic Doppler Current Profiler (ADCP) is described and demonstrated to accurately estimate vertical mass flux and settling velocity for a suspension of fine sand from a dredged material placement operation. A new digital video settling column for simultaneous measurement of particle size and settling velocity

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11

Tessler, Thomaz Martino. "Weather downtime analysis for cutter suction dredgers." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3135/tde-26012017-092026/.

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The dredging activity is increasing worldwide due to ships that require bigger drafts, and consequently deeper navigation channels. Some dredging projects requires the operation of cutter suction dredgers on open waters, once these are capable of removing compact sediments and rocks while still maintaining a good productivity. These facts motivated the creation of a weather driven downtime prediction software for this type of operation, based on simplified calculations of the main dredging systems of a CSD. The motions caused by waves, and the forces and moments caused on these dredgers by win

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12

Haus, Nicholas Wes. "Beneficial Reuse of Dredged Materials in Upland Environments." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/36317.

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Sediments excavated from dredging operations are known as dredged materials. Beneficial reuse of dredged materials in confined utilization facilities (CUFs) is a new approach that has the potential to productively utilize large quantities of dredged materials. However, several factors can inhibit the use of dredged materials in CUFs. In this study, high levels of salts and polycyclic aromatic hydrocarbons (PAHs) were investigated. In the first part of this study, 176,000 m3 of saline dredged materials was placed into a CUF. In less than 4 years, most of the dredged materials had developed

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13

de, Ruyter Marcus J. M. "Two-dimensional cut plan optimization for cutter suction dredgers." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/79367/.

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Optimal cut plans for cutter suction dredgers aim to maximize operational efficiency. Maximizing operational efficiency involves minimization of stoppage time resulting from non-productive dredger movements. To automate a systematic search for optimal twodimensional cut plans for cutter suction dredgers two models with an adaptive simulated annealing-based solution approach were developed. The first model, the dredge cut nesting model, optimizes irregular stock cutting problems where stencils represent dredge cuts and sheets represent dredging areas. Stencils are collections of unit dredge cut

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14

De, Silva Michael S. W. "Chemical and biological aspects of using dredged river Clyde sediments for land restoration." Thesis, University of Strathclyde, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292081.

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15

Makusa, Gregory Paul. "Mechanical properties of stabilized dredged sediments : for sustainable geotechnical structures." Licentiate thesis, Luleå tekniska universitet, Geoteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17437.

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Dredging activities at Ports and Harbors are inevitable for the safe navigation of ships and vessels. Dredged material may range from very fine and contaminated sediments to sand and gravels. While, granular dredged material can be directly utilized in civil engineering applications, fine sediments may require further treatment before use. In geotechnical context, fine sediments are characterized by low shear strength and high compressibility. However, these unfavorable properties do not rule out the suitability of these fine dredged sediments for use in geotechnical construction, such as, roa

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16

Gorham, Richard Arthur. "All dredged up and no place to go : the disposal of contaminated dredged material from greater Vancouver, British Columbia, into the neighbouring strait of Georgia." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24673.

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The thesis provides an integrated review and analysis of strategic scientific information from which management procedures for the environmentally acceptable disposal of dredged materials from Greater Vancouver into the Strait of Georgia are determined. An analysis of reported and suspected contamination of Vancouver's waterways identifies trace metals and hydrophobic organic chemicals that warrant concern by authorities responsible for the management of dredged material disposal. The processes, transformations and pathways of these contaminants in the marine environment subsequent to dredged

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17

Betteker, James Michael. "A laboratory study of solidification/stabilization technology for contaminated dredged material." Thesis, Virginia Tech, 1986. http://hdl.handle.net/10919/45748.

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Safe disposal of contaminated dredged material has become a significant issue especially as public environmental awareness and concerns increase. Solidification/ stabilization technology potentially may provide for a safer, more effective and more economical means of disposal. This research investigated the technical feasibility of applying solidification/stabilization technology to contaminated sediment from Indiana Harbor Canal, Indiana. Specifically, physical strength and reduction of chemical leachability resulting from solidification/stabilization A with various cement based, pozzo

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18

Crawford, Anika. "Beneficial reuse of Baltimore dredged sediments as vertical cutoff wall backfill material." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1473.

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Thesis (M.S.) -- University of Maryland, College Park, 2004.<br>Thesis research directed by: Dept. of Civil and Environmental Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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19

Ma, Kit-cheong James, and 馬傑昌. "Hong Kong Government criteria for assessing contamination levels of dredged marine sediments." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31254718.

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20

Reed, Jaqueline. "Polychlorinated biphenyls in marine sediments and dredged material around England and Wales." Thesis, University College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395670.

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21

Mattson, Gregory A. II. "Characterization of Dredged Sediment Used in Coastal Restoration and Marsh Creation Projects." ScholarWorks@UNO, 2014. http://scholarworks.uno.edu/td/1823.

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To minimize coastal land loss and create new land, dredged sediment has been in use in coastal Louisiana during the last several years. Engineering properties and material characteristics of dredged material are input parameters in several mathematical models used to predict the long-term hydrodynamic behavior of the coast. Therefore, proper characterization of the dredged material is of utmost importance in the correct design of coastal restoration and land creation projects. The sedimentation characteristics of the dredged material, among other factors, depends on the (a) grain size distribu

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22

Ma, Kit-cheong James. "Hong Kong Government criteria for assessing contamination levels of dredged marine sediments /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22264474.

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23

Flaim, Bryna K. "The Continental Shelf as a Site for Dredged Material Disposal, Northeast New Zealand." The University of Waikato, 2008. http://hdl.handle.net/10289/2445.

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Disposal of dredged material has been an on-going problem in the Auckland Coastal Marine Area (CMA) since the early 1980s in New Zealand. Many disposal grounds have been established and used, but public concern over adverse effects resulted in their ultimate closure. Presently, dredged material is disposed off-shore at a site simultaneously accessed by the Royal New Zealand Navy for disposal of WWII munitions recovered from coastal areas. As early as the mid-1990s, parliamentary focus groups established the need for a more suitable disposal option for dredged material. Establishment of a d

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24

Cimino, Vito A. "Optimal placement of dredged material for wetland development within the Charles Mill Reservoir." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1173810919.

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25

Morello, Elisabetta Lavinia Betulla. "Assessment of the impact of hydraulic dredgers for chamelea gallina in Italian waters." Thesis, University of London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406542.

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26

Jeoung, JaeHyeung. "Solidification/stabilization of dredged sludge with low alkalinity additives and geo-environmental assessment." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/148536.

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27

Rudders, David B. "Incorporating industry based dredge surveys into the assessment of sea scallops, Placopecten magellanicus." W&M ScholarWorks, 2010. https://scholarworks.wm.edu/etd/1539616833.

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Cooperative research utilizing industry vessels represents a viable approach to acquire the data necessary to meet the increasing needs associated with the modern management of marine resources. This dissertation addresses a variety of topics associated with the integration of commercial vessels into the stock assessment of the sea scallop, Placopecten magellanicus. In this study we evaluate the efficacy of utilizing industry vessels with respect to topics that range from rotational closed area survey design, sampling gear evaluation as well as an experiment that broadens the scale of the trad

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28

Gedamke, Todd. "Estimating Commercial Scallop Dredge Efficiency through Vessel Tracking, Catch Data, and Depletion Models." W&M ScholarWorks, 2002. https://scholarworks.wm.edu/etd/1539617795.

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29

Thorpe, Jonathan Francis. "The assessment of cementitious additives used for the stabilisation/solidification of dredged harbour sediments." Thesis, University of Canterbury. Department of Civil Engineering, 1996. http://hdl.handle.net/10092/2397.

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This research examined the use of cementitious additives to physically and chemically stabilise dredged harbour sediments for use as fill or for land reclamation purposes. Different combinations of Cement, Stabilime, Old Cement Kiln Dust (OCKD) Diatomite and Amorphous Silica additives were used to stabilise fine dredged harbour sediments from the Nelson and Bayswater (Auckland) marina developements. The relative performance of these different additive combinations were measured in terms of unconfined compressive strength (UCS), and their ability to bind metals using the TCLP leach test. These

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30

Stephens, Samantha Rose. "Trace element associations in dredged canal sediments : implications for disposal of dredgings to land." Thesis, University of Reading, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390619.

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31

FitzGerald, Scott T. 1974. "Use of Geographic Information Systems (GIS) to aid in siting dredged material disposal areas." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50059.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering; and, (S.M.)--Massachusetts Institute of Technology, Technology and Policy Program, 1998.<br>Includes bibliographical references (leaves 60-62).<br>Dredging of the ports and waterways in the United States has implications for the economy and military preparedness and is hampered by a lack of disposal areas. Current dredged material disposal site selection methodologies have several limitations, such as a lack of early public involvement in the decision making process, inadequate documentation of

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32

Bayer, David Michael. "Choreographing Sediment." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/54029.

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In 2016 the Panama Canal expansion is set to open, allowing a new class of ships to call on east coast ports. The dredging involved in deepening navigation channels to ensure safe passage of these vessels will place an increased amount of pressure on containment facilities up and down the coast. With limited disposal space, and increasing volumes, many ports have begun to rethink the treatment of this excess material. This thesis explores the prospect of dredge material being more than engineered fill. It suggests that dredge processing can become the basis for a new form of productive rec

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33

Dorvinen, Jared Ian. "A Method for Interpreting the In-Situ Consolidation State of Surficial Seabed Sediments using a Free-Fall Penetrometer." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/73216.

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Free-fall penetrometers (FFP) are useful instruments for the rapid characterization of seabed sediments. However, the interpretation of FFP data remains largely a skilled task. In order to increase the reliability of results obtained using these instruments, in both expert and non-expert hands, it is advantageous to establish well defined and repeatable procedures for instrument use and data interpretation. The purpose of this research was therefore to develop and refine methods for the interpretation of FFP data. Data were gathered with the FFP Nimrod during two surveys following dredging i

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34

Bhairappanavar, Shruti. "POTENTIAL USE OF DREDGED MATERIAL - CEMENT BRICKS IN THE DESIGN OF SUSTAINABLE INTEGRATED GREEN WALL." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1532967974666973.

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35

Panasik, Gina M. "Effects of the addition of dredged sediment to a marsh ecosystem on benthic microalgal biomass /." Electronic version (PDF), 2003. http://dl.uncw.edu/etd/2003/panasikg/ginapanasik.html.

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36

Brigham, Russell D. "Assessing the Effects of Lake Dredged Sediments on Soil Health: Agricultural and Environmental Implications on Midwest Ohio." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1593902126203743.

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37

Yochum, Noelle. "Size-Selectivity of the Commercial Sea Scallop (Placopecten magellanicus) Dredge: Evaluation the Performance of the New Bedford Style Dredge Configured with 4-Inch Rings and a 10-Inch Twine Top using the SELECT Model." W&M ScholarWorks, 2006. https://scholarworks.wm.edu/etd/1539617841.

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A size-selectivity curve was constructed to characterize the performance of the New Bedford style Atlantic sea scallop (Placopecten magellanicus) dredge when it is configured to meet the requirements of Amendment #10 to the Sea Scallop Fishery Management Plan. The curve was generated using the SELECT model on catch-at-length data, obtained by simultaneously towing a New Bedford style dredge and a non-selective National Marine Fisheries Service sea scallop survey dredge from commercial scallop vessels. Data were collected during three cruises in the Northwest Atlantic between 2005 and 2006. One

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38

Mebust, Christine M. "Analysis of Sedimentation Characteristics of Dredge Sediment Used in Coastal Restoration and Marsh Creation Projects." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/1988.

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There is a demand to reestablish a healthy coastal ecosystem by rebuilding wetlands with river diversion or dredged sediments in coastal Louisiana. Land building projects using dredged sediments from adjacent canals and river beds, can be used to protect the coastal properties and infrastructure systems from flood and storm surges. To predict the sediment’s long term behavior, math models require input parameters based on sediment engineering properties and material characteristics. Proper characterization is critical for accurate design of coastal restoration projects. The dredge material sed

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39

Benson, Kaitlyn Suzanne. "Assessment of Soil Quality Parameters of Long-Term Biosolids Amended Urban Soils and Dredge Blends." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492601621133386.

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40

Croft, Alex. "The effects of thin layer dredge material disposal on tidal marsh processes, Masonboro Island, NC /." Electronic version (PDF), 2003. http://dl.uncw.edu/etd/2003/crofta/alexcroft.html.

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41

Pahuja, Sanjay 1970. "Capping of very weak dredged materials in confined aquatic disposal : modeling of strength and transport behavior." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/87170.

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42

Brown, Stephen Nicholas. "Ecology and enhancement of the flat oyster Ostrea chilensis (Philippi, 1845) in central New Zealand." Thesis, University of Canterbury. Biological Sciences, 2011. http://hdl.handle.net/10092/6203.

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Human activities are causing a global loss of plant and animal species, degrading ecosystem properties and threatening ecosystem services. One indicator of these losses is the increasing proportion of fish stocks in decline, and the Challenger oyster fishery in Tasman Bay, central New Zealand is an example of one such fishery. Anthropogenic effects from land-based activities, and towed-gear fishing have been implicated as contributors to the decline of shellfisheries and degradation of the marine ecosystem in Tasman Bay. Increased sedimentation in the bay caused by soil erosion and runoff asso

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43

Tolle, Carly. "Assessing the litter removal and invertebrate communities of soybean stem detritus grown in dredge-amended soils: a Northwest Ohio field study." Bowling Green State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626984325564693.

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44

Mitchell, Elaine. "Implications of the nature and quality of dredged material and its beneficial placement in the coastal environment." Thesis, University of Hull, 2007. http://hydra.hull.ac.uk/resources/hull:16066.

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Dredged sediment is increasingly being used in mudflat recharge schemes and in habitat restoration/recreation to counter the effect of erosion and sea-level rise. For this reason it is necessary to determine the response of indigenous mudflat fauna to anthropogenic sediment deposition and so in 2001 a manipulative experimental laboratory study was used to assess the biological response to the alternative beneficial use of uncontaminated maintenance dredged material. The experiment assessed the response of common temperate macro-benthic organisms to the addition of increasing amounts of simulat

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45

Boyd, Sian Ellen. "A comparative study of the responses of microfaunal and nematode assemblages to the disposal of dredged material." Thesis, Bangor University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298890.

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46

Oing, Katja [Verfasser], and Annette [Akademischer Betreuer] Eschenbach. "Suitability of Processed Dredged Material from the Hamburg Harbor for Dike Construction / Katja Oing ; Betreuer: Annette Eschenbach." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1192913000/34.

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47

Johnson, Charley R. "Migration of Dredged Material Mounds: Predictions Based on Field Measurements of Waves, Currents, and Suspended Sediments, Brunswick, GA." Thesis, Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-04082005-145658/unrestricted/johnson%5Fcharley%5Fr%5F200505%5Fmast.pdf.

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Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2005.<br>F. Michael Saunders, Ph.D., Committee Member ; Kevin Haas, Ph.D., Committee Member ; Paul A. Work, Ph.D., Committee Chair. Includes bibliographical references.

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48

Paavo, Brian Lee, and n/a. "Soft-sediment benthos of Aramoana and Blueskin Bay (Otago, New Zealand) and effects of dredge-spoil disposal." University of Otago. Department of Marine Science, 2007. http://adt.otago.ac.nz./public/adt-NZDU20070928.161657.

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Studies were conducted to broadly describe and understand the sediment benthos of a shallow-water coastal area (Aramoana Beach - Heyward Point - Blueskin Bay) near the entrance to Otago Harbour, a system largely representative for southeastern New Zealand. Benthic assemblages were examined in relation to gradients of wave exposure and disturbance, sediment type and bathymetry, and dredge-spoil disposal. Sediment and macrofaunal surveys in autumn and spring 2003 found little change in sediment texture gradients from historical studies and a lack of vertical stratification. Macrobenthic sample

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49

Robinson, Arabella Mary Milbank. "Love and drede : religious fear in Middle English." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/280671.

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Several earlier generations of historians described the later Middle Ages as an 'age of fear'. This account was especially applied to accounts of the presumed mentality of the later medieval layperson, seen as at the mercy of the currents of plague, violence and dramatic social, economic and political change and, above all, a religiosity characterised as primitive or even pathological. This 'great fear theory' remains influential in public perception. However, recent scholarship has done much to restitute a more positive, affective, incarnational and even soteriologically optimistic late-medie

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50

Schmidt, Martin. "Assessment of the physical, chemical and leaching characteristics of a marine sediment dredge spoil at Bing Bong, Northern Territory /." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09AR/09ars353.pdf.

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