Littérature scientifique sur le sujet « Scheduled deposits »
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Articles de revues sur le sujet "Scheduled deposits"
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Will, Robert S. « Rescue Excavations at Plean Castle, Stirling District ». Glasgow Archaeological Journal 21, no 1 (janvier 1998) : 45–52. http://dx.doi.org/10.3366/gas.1998.21.21.45.
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Summary Excavations within the courtyard of the fifteenth century towerhouse were undertaken to fulfil conditions of Scheduled Monument Consent. They revealed some new details of the medieval structures, but encountered few stratified deposits. Most secure archaeological deposits appear to have been removed during the early twentieth century restoration.
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Madeira, Claudio Valdetaro, et Leonardo Borghi. « Estrutura dos depósitos sedimentares quaternários da bacia hidrográfica do rio Santana, Miguel Pereira, Estado do Rio de Janeiro ». Anuário do Instituto de Geociências 22 (1 janvier 1999) : 8–22. http://dx.doi.org/10.11137/1999_0_8-22.
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The present work deals with stratigraphy, sedimentology and geomorphology of Quaternary sedimentary deposits of Santana river hydrographic basin. through facies and arquitectural elements descriptions. Based on five arquitectural elements characterized by ten lithofacies the following structural and depositional evolutions were scheduled: 1) formation of thick soil horizons over the basement; 2) deposition of several alluvial fans on the soils (lithofacies Gm and Fm, element E); 3) above an unconformity we can recognize a fluvial system, characterized by a non well drainage floodplain. This floodplain is overlaid by high-sinuosity channels (lithofacies Sp and St, element C) genetically related to other floodplain (lithofacies Fl and Fsc, element A) where the interfigering with crevasse splay deposits (lithofacies Sh, Sl, and Sp, element B) is ususal; 4) an erosional phase suceed by a new depositional phase characterized by low-sinuosity channels (lithofacies Gp, Gt, Sp, St, and Sh, element D). Nowadays anthropogenic action produces a new erosional phase. The geomorphological features recognized were scheduled: 1) the present floodplain 1.5m above the river bed; 2) the low terrace ( named T2) 5m above the river bed and its deposits is related to element D; 3) the high terrace ( named T1) 11m above the river bed and its deposits is related to elements A, B, C and E.
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Chaudhury, Suman, et Sukanta Sarkar. « NAVIGATING FINANCIAL FRONTIERS : AN EXPLORATORY STUDY OF INSTITUTIONAL FINANCE IN ASSAM ». VIDYA - A JOURNAL OF GUJARAT UNIVERSITY 3, no 1 (26 décembre 2024) : 113–18. https://doi.org/10.47413/8sgxh147.
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The paper discussed the progress and challenges of institutional finance in Assam. It has been observed that the commercial banks of Assam are leading in deposits and dispersion of credits in this north-eastern state of India. The deposits and credit of the scheduled commercial banks are increasing continuously. Those credit and deposits are higher in scheduled commercial banks situated in the urban areas. Savings and term accounts contribute to more deposits in the banks. Advance to weaker section is highest in the regional rural banks. The public sector banks are in a leading position in disbursing KCC numbers and KCC amounts. There are many challenges before institutional finance in Assam. Therefore, the government should introduce proper banking policies to mitigate such challenges. This paper contributes to the broader goal of promoting sustainable development, reducing disparities, and enhancing the overall well-being of Assam’s populace. It is also the first to address the critical gaps in the understanding of the financial landscape of Assam, a region undergoing rapid socio-economic transformation. The findings of this study can ignite policy formulation and strategic decision-making processes at both the regional and national levels. Hence, this paper discusses the progress and challenges of institutional finance in the state.
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Jeon, Soon-Hyeok, Yong-Beom Lee, Kyung-Hee Lee et Do-Haeng Hur. « Magnetite Deposition Behavior on Alloy 600 and Alloy 690 Tubes in Simulated PWR Secondary Water ». Coatings 12, no 9 (24 août 2022) : 1231. http://dx.doi.org/10.3390/coatings12091231.
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Fouling due to magnetite deposition has been a major concern for steam generator (SG) tubing of pressurized water reactors (PWRs). Alloy 690 SG tubes are now used for new plants or are scheduled to replace old Alloy 600 tubes of operating plants. The purpose of this study is to investigate the magnetite deposition behavior on the two different SG tube materials: Alloy 600 and Alloy 690. Deposition tests were conducted under a sub-cooled nucleate flow boiling condition in simulated secondary water of a PWR at 270 °C. After these tests, we observed that the tube surfaces were covered with deposits composed of porous magnetite particles. We found approximately 30% more magnetite deposits on Alloy 600 than on Alloy 690. The electrostatic repulsive force between the magnetite particles and the Alloy 600 surface was only half of that between the magnetite particles and the Alloy 690 surface, resulting in an increase in the deposit mass.
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Chaudhury, Dr Suman Kalyan, Dr Sukanta Sarkar et Dr K. Harun. « Navigating Financial Frontiers : An Exploratory Study of Institutional Finance in Assam ». International Journal of Economics, Business and Management Research 09, no 02 (2025) : 30–39. https://doi.org/10.51505/ijebmr.2025.9203.
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This paper examines the progress and challenges of institutional finance in Assam. It reveals that the commercial banks of Assam are leading in deposits and dispersion of credits in the northeastern region of India. Deposit and credit disbursement of banks are showing consistent growth. Scheduled commercial banks in urban areas account for the largest share of these deposits and credits, with savings and term accounts being the primary contributors to deposit growth. Weaker section advance to weaker section advance is highest in a regional rural bank. Public sector banks are in a leading position in disbursing KCC numbers and KCC amounts. There are many challenges before the institutional finance in Assam. Therefore, the government should introduce proper banking policies to mitigate such challenges. This study aims to contribute to the broader goal of promoting sustainable development, reducing disparities, and enhancing the overall well-being of Assam’s populace. This paper is the first to address the critical gap in the understanding of the financial landscape of Assam, a region undergoing rapid socio-economic transformation. As the first to specifically address the financial landscape of Assam during its rapid socio-economic transformation, the paper's findings can inform policy and strategic decisions at both regional and national levels.
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Sharma, Madhu. « Role of the Insurance and Banking Sector in the Indian Economy ». Journal Global Values XV, no 1 (30 juin 2024) : 19–25. https://doi.org/10.31995/jgv.2024.v15i01.03.
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In the 21st Century Banking Plays an Important role. It is Simplest From Where Society Recorganizes the Need For Stroing Money and the Need a Safe Place to Store it. This Safe Place Ultimately Evolved into Financial Institutions that accept deposits And Make Loan I,e; the Modern Commercial. According to the Oxford Dictionary. An establishment for the Custody of Money That Pays for the Customer’s Order, (Indian Bank System) consists of an Organized Sector and an Unorganized Sector. Organized Sectors Consist of the Reserve Bank of India, Commercial Bank, and Co-Operate Bank. Commercial bank Counts of Scheduled banks, On-Scheduled banks, State cooperation, the apex body, IDBI, NABARD, Bank, etc.
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Birajdar, Bhaskar. « Voyage of Indian Banking Sector : 1979-2007 ». Journal of Global Economy 6, no 4 (31 octobre 2010) : 243–52. http://dx.doi.org/10.1956/jge.v6i4.64.
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Observing through the voyage of India Banking Sector, it could be concluded that Indian banking system is operating under competitive state of affairs and earns revenues as if under monopolistic competition, despite not depending on traditional source of fund in the form of deposits as profitability, i.e., return on assets are increasing and approaching towards industry ratio. But still foreign banks functioning in India are on a higher plane with respect to its performance in comparison with other bank groups. Costs of deposits and return on advances of all scheduled commercial banks have declined in the post reform period. However, return on advances was approaching closer to industry average showing competition amongst the banks in making profit on the interest rate front.
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Chaikovskyi, Yaroslav. « The development of bank lending to corporate clients in Ukraine in times of economic cycles ». Herald of Ternopil National Economic University, no 4 (86) (12 décembre 2017) : 72–87. http://dx.doi.org/10.35774/visnyk2017.04.072.
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The article considers bank lending to corporate clients in Ukraine overcoming the issues related to economic cycles. The dynamics of gross domestic product, total assets, and credit portfolios of Ukraine’s banks over the period between 2012 and 2016 is analyzed. The changes in the composition of bank loans to non-financial corporations are analyzed in terms of scheduled payments, forms of currencies, target allocation and economic activities. Additionally, the dynamics and composition of residents’ deposits mobilized by deposit-taking corporations are considered in terms of scheduled payments over the above period. The major factors that hinder the recovery of bank lending to corporate clients are identified. It is highlighted that the main obstacles to the development of banking lending to corporate clients in Ukraine in times of economic cycles are as follows: high interest rates; a significant percentage of unprofitable enterprises and loan arrears in bank loan portfolios; an increase of non-performing loans (NPL); the fact that banks, having sufficient liquidity for lending to economy-boosting projects, prefer to purchase government securities; corrupt practices of granting loans to affiliated companies (insider loans). The percentage of unprofitable enterprises in Ukraine in 2016 is determined and analyzed by type of economic activity. Based on the analysis performed, some assumptions are made about the trends of the development of bank lending to corporate clients in Ukraine and proposals on further harmonization of bank lending to corporate clients in times of economic cycles are set out.
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Auguścik-Górajek, Justyna, Jacek Mucha, Monika Wasilewska-Błaszczyk et Wojciech Kaczmarek. « Problems of Estimating the Resources of Accompanying Elements : A Case Study from the Cu-Ag Rudna Deposit (Legnica-Głogów Copper District, Poland) ». Minerals 11, no 12 (18 décembre 2021) : 1431. http://dx.doi.org/10.3390/min11121431.
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As a result of the exploitation of ore deposits, in addition to the main elements, the accompanying elements are also partially recovered. Some of them increase the profitability of exploitation, while others reduce it because they hinder the recovery of the main elements and thus increase the costs of the recovery process. A comprehensive economic calculation to assess the profitability of ore mining depends on an appropriately accurate estimation of the resources of both the main and associated elements. This issue was analyzed with the example of the Cu-Ag Rudna ore deposit (LGCD, Poland). The subject of the assessment was the resources prediction accuracy of the main element (Cu) and four (4) accompanying elements (Co, Ni, Pb, and V) using geostatistical estimation method, in particular the ordinary kriging after the estimation of the relative variograms for describing the spatial variability structures of elements abundance. It was found that the standard kriging errors (deviations) in accompanying elements resources that are scheduled for exploitation within a one-year period in some parts of deposits are drastically greater (2 to 5 times) than the estimation errors of the main element resources. This is due to the sparse sampling pattern for their determinations and/or the high variability (among others nugget effect) of their abundance. In this situation, without additional sampling and a denser sampling pattern, the possibilities of a reliable assessment of the influence of accompanying elements on the economic consequences of exploitation are very limited.
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D'Avignon, Robyn. « Shelf Projects : The Political Life of Exploration Geology in Senegal ». Engaging Science, Technology, and Society 4 (1 mars 2018) : 111. http://dx.doi.org/10.17351/ests2018.210.
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Since the early 2000s, southeastern Senegal has emerged as a premier gold exploration and mining frontier. At present, the Sabodala gold mine, owned by the Canadian company Teranga Gold, is the only operational gold mine and mill in Senegal. But two more open-pit gold operations are scheduled to open this year, and several other companies have announced discoveries of industrial-scale deposits. By documenting the shifting ownership and exploration of the Sabodala deposit, this article draws attention to how the protracted phase of mineral research shapes the political life of mining operations in Africa and elsewhere in the global South. Geological exploration in colonial and post-colonial Senegal, as in much of Africa, has relied heavily on the expertise of indigenous miners and smelters. Mining Sabodala has thus unearthed multi-vocal and contested histories of gold discovery. Historians of science have established that field assistants and experts in Africa have produced agronomic and medical knowledge typically credited to “the West.” By extending this argument to gold exploration, the article brings African history into dialogue with an emergent anthropology of subterranean knowledge production.
Thèses sur le sujet "Scheduled deposits"
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Jones, Jentry Indigo. « Behavioral Household Finance and Robo-Advising ». Electronic Thesis or Diss., Orléans, 2024. http://www.theses.fr/2024ORLE1084.
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Cette recherche étudie le comportement des ménages investisseurs qui utilisent un robo-advisor français à travers quatre articles empiriques. Dans la première étude, les investisseurs qui épargnent régulièrement épargnent moins à moyen et long terme que ceux qui n'épargnent que sporadiquement, ce qui remet en question l'universalité de ce conseil financier populaire. Dans la deuxième étude, les investisseurs actualisent le risque de leur portefeuille au fil du temps d'une manière qui ne reproduit pas toujours les résultats obtenus avec des portefeuilles statiques, ce qui remet en question la mesure dans laquelle la recherche sur les portefeuilles statiques devrait éclairer les conseils pratiques sur les portefeuilles dynamiques. Dans la troisième étude, les investisseurs ont globalement moins épargné pendant la pandémie de Covid-19 et ont actualisé différemment leurs plans à long et à court terme, comblant ainsi une lacune à laquelle les données au niveau de marché ne peuvent pas répondre et donnant un aperçu de la manière dont les investisseurs pourraient réagir aux crises à venir. Dans la quatrième étude, les parents investissent pour leurs enfants de la même manière que pour eux-mêmes et ouvrent un peu plus de comptes pour leurs fils que pour leurs filles, ce qui met en évidence les domaines dans lesquels les gestionnaires de patrimoine doivent mieux informer les familles sur la manière de planifier les finances de leur ménage. Dans l'ensemble, cette recherche documente de nombreux écarts comportementaux au niveau microéconomique par rapport à la théorie financière traditionnelle et démontre que la recherche scientifique utilisant des données sectorielles peut donner lieu à des découvertes surprenantesThis research studies the behavior of household investors who use a French robo-advisor across four empirical papers. In the first study, investors who save regularly save less in the medium- to long-run than those who only save sporadically, calling into question the universality of this popular financial advice. In the second study, investors update their portfolio risk over time in a way that does not always replicate findings from static portfolios, challenging the extent to which research on static portfolios should inform practical advice about dynamic portfolios. In the third study, investors saved less overall during the Covid-19 pandemic and updated their long- and short-term plans differently, addressing a gap that market-level data cannot answer and providing insights into how investors may react to future crises. In the fourth study, parents invest for their children similar to how they invest for themselves and open slightly more accounts for sons than for daughters, highlighting areas where wealth managers must better inform families about how to plan their household finances. Overall, this research documents many micro-level behavioral departures from traditional finance theory and demonstrates how scientific research using industry data can yield surprising discoveries
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Lin, Li-Fang, et 林麗芳. « The Cost of Deposit Insurance with Stochastic Interest Rate:Forbearance and Examination Schedule ». Thesis, 2005. http://ndltd.ncl.edu.tw/handle/92q98t.
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碩士銘傳大學
財務金融學系碩士班
93
Abstract The study estimates the costs of deposit insurance of Taiwan’s banks by using the Merton’s (1977) option pricing model. We use the Duan, Moreau and Sealey’s(1995) model by applying the Vasicek process into option pricing model. Then, we applies Duan’s (1994,2000) approach that uses the observed prices of a derivative contract to compute maximum likelihood parameter estimates for an unobserved asset value process. This part is different from Ronn and Verma’s(1986) approach, it could make estimation procedure conform to statistic consistency. The study includes two parts: firstly, with the parameter values, 0.97 of forbearance and 0.5 of maturity, we calculate the costs of deposit insurance. The estimated costs of deposit insurance are much higher than the actual cost. This result can be interpreted in two ways. The simplest interpretation is to conclude that banks were indeed subsidized by the deposit insurance system. Alternatively, one can attribute these results to the forbearance and examination schedule assumed in this study. Secondly, we imply the forbearance and maturity from the actual cost of deposit insurance and option pricing model. The results of the study have policy implication: for example, we can explain why banks in Taiwan seldom bankrupt by the implied low forbearance rate. Besides, Central Deposit Insurance Corporation (CDIC) should increase the examination frequency under low premium. Key Words: deposit insurance, stochastic interest rate, capital forbearance, examination schedules
Livres sur le sujet "Scheduled deposits"
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Council, South Northamptonshire (England) District. South Northamptonshire local plan : Deposit : schedule of proposed changes. [Towcester] : South Northamptonshire District Council, 1994.
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Council, Wealden (England) District. Uckfield local plan : Schedule of proposed modifications to the deposited plan. Crowborough : Wealden District Council, 1988.
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United States. General Accounting Office. Accounting and Information Management Division. Financial audit : Schedule of Loans Receivable serviced by the Bureau of the Public Debt. Washington, D.C. (P.O. Box 37050, Washington, D.C. 20013) : The Office, 1998.
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Division, United States General Accounting Office Accounting and Information Management. Financial audit : Schedule of Loans Receivable serviced by the Bureau of the Public Debt. Washington, D.C. (P.O. Box 37050, Washington, D.C. 20013) : The Office, 1998.
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United States. Congress. House. Committee on Ways and Means. et United States. Congress. Joint Committee on Taxation., dir. Tax and debt management aspects of H.R. 1505 (the Financial Institutions Safety and Consumer Choice Act of 1991) : Scheduled for a hearing before the Committee on Ways and Means on May 29, 1991. [Washington, D.C : Joint Committee on Taxation, 1991.
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Financial audit : Schedule of Loans Receivable serviced by the Bureau of the Public Debt. Washington, D.C. (P.O. Box 37050, Washington, D.C. 20013) : The Office, 1998.
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Convention on Psychotropic Substances with revised schedules, Vienna, 21 February 1971 : (The United Kingdom instrument of ratification was deposited on 24 March 1986 and the Convention entered into force for the United Kingdom on 22 June 1986). London : HMSO, 1993.
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Financial audit : Examination of the Bureau of the Public Debt's fiscal year 1997 Schedule of Federal Debt : report to the Secretary of the Treasury. Washington, D.C. (P.O. Box 37050, Washington 20013) : The Office, 1998.
Trouver le texte intégralChapitres de livres sur le sujet "Scheduled deposits"
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Arora, Rakhi. « Marketing of Banking Services in India ». Dans Strategic Marketing Management and Tactics in the Service Industry, 107–33. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-2475-5.ch005.
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Banking sector plays an important role in Indian Financial Sector.It has a long history that has gone through various stages of development after Liberalization, Privatization, and Globalization (LPG) has taken place. The Indian banking sector is broadly classified into scheduled banks and non-scheduled banks. The scheduled banks are those included under the 2nd Schedule of the Reserve Bank of India Act, 1934. The scheduled banks are further classified into: nationalised banks; State Bank of India and its associates; Regional Rural Banks (RRBs); foreign banks; and other Indian private sector banks, which are controlled and governed by Reserve Bank of India (Central Bank of India) and Ministry of Finance. In this era, the government has issued licenses to the new entrants to establish new banks to serve the Indian society. This chapter focuses on to show the various undergone phases of Indian banking system, growth of deposits and credits, technological development in Indian banking sector, services provided by the Indian banks, benefits and challenges faced by the Indian banks.
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Praveen, Roopa, Dilip Aher et Nilesh Anute. « Punjab and Maharashtra Cooperative Bank Scam (PMC Bank) ». Dans Indian Business Case Studies Volume V, 49–54. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780192869418.003.0007.
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Abstract The Punjab & Maharashtra Cooperative Bank (P&MC) bank started its operations in 1984. In 1999 the all India bank depositors association felicitated the bank for the work ethics oriented to depositors’ service. Within a period of six years the bank bagged the status of scheduled bank; as in 2000 the RBI conferred scheduled status to P&M cooperative bank. The HDIL P&MC bank scam was shocking news for people in banking fraternity and the depositors of the bank. The top management officials have given huge loan to the HDIL (Housing Development and Infrastructure Ltd.) and its associated companies. The amount sanctioned was as huge as it was 70% of the total loan disbursements by the bank. The total amount of fraud was said to be Rs. 4355 crore, which led to shooting up of the NPA of the bank to 73%. The scam has been called as the failure of the banking system, auditing system, and loop holes in the policies. This is a perfect case to analyse the failure of such a system by the hands of few officials.
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S. Sankareswari, Dr. « A STUDY OF CREDIT RISK MANAGEMENT SYSTEMS IN SCHEDULED COMMERCIAL BANKS IN INDIA ». Dans Futuristic Trends in Management Volume 3 Book 24, 338–52. Iterative International Publisher, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bhma24ch38.
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The banking sector went through significant changes after banks were nationalized in 1969, The government policies promoting liberalization, privatization, and globalization. Banks face credit risk when borrowers may not repay their loans, which includes individual loan defaults and overall portfolio risk. This risk is inherent in lending, especially when borrowers' financial capacity is not well-understood. This study focuses on Scheduled Commercial Banks in three categories: Public Sector Banks, Private Sector Banks, and Foreign Banks, excluding Regional Rural Banks. It examines their credit efficiency through metrics like loan-to-deposit ratio, Capital Adequacy Ratio, Credit Deposit Ratio, and Non-Performing Assets (NPA) ratios. Additionally, the study evaluates how these banks manage Non-Performing Assets, looking at NPA levels, asset quality, and recovery efforts. The researcher has identified these issues for analysis and interpretation.
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Seah T.H., Moh Z.C., Chin C.T. et Duann S.W. « Pile foundations of Taiwan High Speed Rail ». Dans Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, 2005. https://doi.org/10.3233/978-1-61499-656-9-2175.
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The 345 km guideway of the Taiwan High Speed Rail Project runs through the populated west coast of Taiwan Island, linking Taipei to southern city of Kaohsiung. The geological conditions along the route vary substantially, having mountainous terrain in the north to thick sedimentary deposits in the south. As a result, the northern section is constructed mostly by cut-and-fill, with bridges and tunnels, while the southern half is mostly elevated supported by large bored piles. The contracts were awarded as design-and-build basis under relatively tight schedule, therefore significant efforts had been placed on optimization of design and construction. In design stage, the focus was on establishing effective soil investigation programs, verification of pile design formulae through extensive pile load tests. In construction stage, attention had been concentrated on construction of pile foundations, pile quality control and remedial methods etc. Discussed herein are some relevant geotechnical information gathered which may be useful to the engineers.
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Banerjee, Milinda. « A Non-Eurocentric Genealogy of Indian Democracy ». Dans Vernacular Politics in Northeast India, 83–110. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780192863461.003.0003.
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This chapter offers a non-Eurocentric history of democracy by studying the communities who traditionally pursued shifting cultivation in the hilly landscape of Tripura and are classified today as Scheduled Tribes. In precolonial Tripura, power was never monopolized by the monarch or a narrow nobility. Large military and administrative circles, and the wider populace, regularly intervened in high politics, constructing a ‘polycracy’. Tripura’s state chronicle Rajmala portrayed ‘the people’ in regular deliberation and revolutionary action, including in selecting and deposing rulers. The kingship and the polycracy interacted to give birth to modern constitutionalism in interwar Tripura, followed in the late 1940s by a Tripuri left-democratic revolution. Tripuri polycracy conversed with modern Western socialism to nourish an indigenous democratic tradition of popular politics that shapes the region until today. Tripura thus exemplifies how Indian democracy has been shaped as much by precolonial-origin collective politics and political thinking, as by modern Western constitutionalism and parliamentarianism.
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Payne Grant, Ahmad Abdul, Fitzpatrick Stephen, Xirouchakis Paul, Ion William et Wilson Michael. « Remanufacturing H13 Steel Moulds and Dies Using Laser Metal Deposition ». Dans Advances in Transdisciplinary Engineering. IOS Press, 2016. https://doi.org/10.3233/978-1-61499-668-2-93.
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The exploitation of Additive Manufacturing (AM) in the repair and remanufacture of industrial components, such as moulds and dies, has become an emerging research area due to the expected reduction of replacement cost and the promise of better mechanical and wear resistance properties – moreover, the use of remanufacturing standards ensures a greater than or equal to warranty part quality. Further studies plan to utilize Laser Metal Deposition (LMD) to remanufacture artificially worn H13 Steel samples, allowing benchmarking studies to be conducted in order to compare the mechanical and wear resistance performance of LMD against current welding repair technologies. The specimens will be subjected to an accelerated pressure and elevated temperatures schedule, simulating the loading cycles during the use of the die sets. The effects on the resulting part properties of different process parameters setup, including the type and characteristics of the deposited powder will be studied.
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Bathe Abhijit, McCabe W. Martin, Bryson L. Sebastian, Lobedan Frank et Won Samuel. « Primary Consolidation Settlement of Embankments Constructed on Young Bay Mud of San Francisco Bay ». Dans Advances in Soil Mechanics and Geotechnical Engineering. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-601-9-1177.
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Active Airports are complex environments for geo-construction. Construction activities must not interfere with takeoff and landing operations and the final earthwork must provide adequate bearing support for the aircraft and support equipment. This case study discusses challenges faced in the design and construction of two 5 to 6 ft (1.52 to 1.83 m) high embankments for new taxiways at Oakland International Airport in Oakland, CA. The taxiway embankments were constructed partly on a manmade wetland located on top of Quaternary Young Bay Mud (YBM). YBM is a thick deposit of soft, saturated, unconsolidated silty clay in the San Francisco Bay area which exhibits low shear strength, high compressibility and low permeability, making it a very problematic foundation material. A ground improvement program was undertaken to expedite approximately 90 percent of estimated primary consolidation settlement to meet the construction schedule. The ground improvement program consisted of using a maximum permitted surcharge near the operating runway and Prefabricated Vertical Drains (PVD). The settlement of both surcharged embankments was monitored using settlement plates. In addition, soil parameters were updated using ongoing measurements to revise the estimated final settlement and time required to achieve geotechnical stabilization. This case study discusses the parameters used for acceptable geotechnical stabilization, compares the estimated and actual magnitude and duration of settlement with and without ground improvement, and comments on conventionally used soil parameters for the Bay Mud.
Actes de conférences sur le sujet "Scheduled deposits"
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Palazzotto, John D., Joseph Timar et Alan T. Beckman. « Design and Development of a New Landfill/Biogas Engine Oil for Modern, High BMEP Natural Gas Engines ». Dans ASME 2011 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/icef2011-60079.
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The use of higher brake mean effective pressure (BMEP) engines in landfill or alternative gas applications has increased dramatically in the past few years. Operators are using these engines due to their ability to provide lower emissions coupled with improved economics for the end user due to the higher density or power output capability compared to an engine of similar size and displacement. Landfill gas (LFG) quality can vary greatly as well as the contaminant level due to the composition of the landfill. This environment poses unique challenges to both the engine and the engine oil, including shorter oil drain intervals, corrosive attack of engine components, with increased piston and combustion chamber deposits, to name but a few. Maintaining longer oil drain intervals minimizes unscheduled oil drains which can decrease the overall cost of the landfill operation. High BMEP engines provide higher power output but at the cost of increased maintenance in severe fuel applications. Excessive piston crown and combustion chamber deposits from landfill gas impurities can have a deleterious effect on engine emissions, which may lead to the inability to meet local emissions regulations. Engine lubricants must provide adequate oil life as well as minimizing deposit related issues that may negatively impact regular scheduled maintenance cycles, thus reducing engine downtime and increasing revenues. Traditionally, the approach has been that oils formulated for landfill applications used excess base reserve to sufficiently neutralize the acids being formed during the combustion process. Unfortunately, this approach increases the sulfated ash content of the lubricant which lends itself to increased ash deposits and negatively impacts the combustion dynamics of these high BMEP engines, which are sensitive to ash deposition. Based on requests for a longer life lubricant without compromising deposit control characteristics in serve landfill applications, a new product development project was specifically targeted for late model, high BMEP engines, which are prone to detonation and sensitive to ash related deposits. This paper presents the development bench testing, and proof of performance field evaluations of a new generation, low ash landfill gas engine oil.
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Georgescu, P. D., S. T. Petrescu et T. F. Iuhas. « Restructuring the Uranium Mining Industry in Romania : Actual Situation and Prospects ». Dans 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22657.
Texte intégralRésumé :
Uranium prospecting in Romania has started some 50 years ago, when a bilateral agreement between Romania and the former Soviet Union had been concluded and a joint Romanian-Soviet enterprise was created. The production started in 1952 by the opening of some deposits from western Transylvania (Bihor and Ciudanovita). From 1962 the production has continued only with Romanian participation on the ore deposit Avram Iancu and from 1985 on the deposits from Eastern Carpathians (Crucea and Botusana). Starting with 1978 the extracted ores have been completely processed in the Uranium Ore Processing Plant from Feldioara, Brasov. Complying with the initial stipulations of the Nuclear National Program launched at the beginning of the 1980s, the construction of a nuclear power station in Cernavoda has started in Romania, using natural uranium and heavy water (CANDU type), having five units of 650 MW installed capacity. After 1989 this initial Nuclear National Program was revised and the construction of the first unit (number 1) was finalized and put in operation in 1996. In 2001 the works at the unit number 2 were resumed, having the year 2005 as the scheduled activating date. The future of the other 3 units, being in different construction phases, hasn’t been clearly decided. Taking into consideration the exhaustion degree of some ore deposits and from the prospect of exploiting other ore deposits, the uranium industry will be subject of an ample restructuring process. This process includes workings of modernization of the mines in operation and of the processing plant, increasing the profitableness, lowering of the production costs by closing out and ecological rehabilitation of some areas affected by mining works and even new openings of some uraniferous exploitations. This paper presents the actual situation and the prospects of uranium mining industry on the base of some new technical and economical strategic concepts in accordance with the actual Romanian Program for Nuclear Energetics.
3
Ellefmo, Steinar Løve, Martin Ludvigsen et Erik Kristian Thon Frimanslund. « Full Cycle Resource Evaluation of SMS Deposits Along the Arctic Mid Ocean Ridge ». Dans ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62525.
Texte intégralRésumé :
Several hydrothermal vent sites have been discovered along the portion of the Arctic Mid-Ocean Ridge (AMOR) inside the extended Norwegian continental shelf (NCS). Seafloor massive sulfide (SMS) deposits are associated with these hydrothermal vent sites. These deposits contain significant amounts of valuable metals, such as copper, zinc, gold, and silver. Loki’s Castle is one of the most promising sites along the AMOR, with two 20–30 m high and 100 m wide mound-shaped SMS deposits. It is located at a water depth of 2,400 m. A production system concept is proposed for a deep-sea mining operation at Loki’s Castle based on the Nautilus Minerals’ Solwara 1 project. The overall cost structure and design of the Nautilus’ concept is in this study regarded feasible in AMOR in spite of the difference between the operating environment for the two locations. As the only relevant operational experience is De Beers’ shallow-water diamond mining off the coast of South Africa and Namibia, most of the environmental criteria used are taken from offshore drilling. Based on the net operating time, and accounting for scheduled maintenance and waiting-on-weather time, an estimate for annual average production rate and an annual production volume are estimated. Significant downtime is expected in January and July. Significant uncertainties are associated with early phases of projects. Probabilistic cost, grade and price estimates allow dealing quantitatively with uncertainties by giving input variables as probability distributions. Monte Carlo simulations are in this study run for different sets of variables, and the resulting key performance indicators are given as distributions. This paper adapts and presents a methodology normally used to assess technological and economic feasibilities of oil and gas projects. The methodology is adapted to the assessment of deep-sea mining projects and is illustrated through the assessment of the case based on Loki’s Castle ore characteristics and technologies planned for the Solwara 1 project with a cost structure adjusted according to AMOR conditions. Costs for processing, refining, waste disposal and logistics after ore arrival at onshore port is not included. The ore uncertainties are huge and the resources are with the present deposit knowledge speculative. Therefore, this study do not attempt to define any reserves.
4
Cohn, Marvin J., Steve R. Paterson et Dan Nass. « Case History of Solidification Cracks in 2-1/4Cr 1Mo Low Carbon Welds — Cholla Unit 2 ». Dans ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1317.
Texte intégralRésumé :
An examination of the main steam girth welds at Cholla Unit 2 was performed during a scheduled outage in Spring 1999. The examination revealed two distinct types of cracks. Nine girth welds had extensive arrays of small discontinuous ultrasonic examination indications in the weld deposit near the weld roots. Two girth welds had cracks connected to the outside surface of the pipe. Justifications for removing and replacing 11 of the 35 examined main steam girth welds are presented in this paper. Nondestructive examinations revealed small discontinuous indications near the root of several welds and throughout the weld deposit. In the most severe cases, these weld metal indications extended all the way around the circumference of the pipe. A metallurgical evaluation of both shop and field welds determined that the indications were arrays of small solidification cracks, typically 1/16-inch high by 1/32-inch long. The solidification cracks were attributed to wide weave beads in combination with low carbon content consumables. There was also a concern that those weld deposits with very low carbon (less than 0.05 weight percent) may have significantly shorter creep lives. In addition to the fabrication-induced solidification cracks, two girth welds were identified with service-induced creep cracks. The first of these was detected during ultrasonic and fluorescent magnetic particle examinations of selected welds. The second was detected visually in an auxiliary steam piping weld connection that was identified as a high priority weld resulting from a life consumption evaluation of the piping system.
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Sabau, Adrian S., Ian G. Wright, John P. Shingledecker et Peter F. Tortorelli. « Managing Oxide Scale Exfoliation in Boilers with TP347H Superheater Tubes ». Dans AM-EPRI 2013, sous la direction de D. Gandy et J. Shingledecker. ASM International, 2013. http://dx.doi.org/10.31399/asm.cp.am-epri-2013p0821.
Texte intégralRésumé :
Abstract A model based on a concept of “fraction of exfoliated area” as a function of oxide scale strain energy was developed to predict the extent of exfoliation of steam-side scale from boiler tube superheater loops. As compared with the Armitt diagram, which can be used to predict when scale damage and exfoliation would be likely to occur, a “fraction of exfoliated area” approach provides an estimation of mass of scale released and the fraction of tube likely to be blocked by the exfoliation. This paper gives results for the extent of blockage expected in a single bend of a superheater loop was predicted as a function of operating time, bend geometry, and outlet steam temperature under realistic service conditions that include outages. The deposits of exfoliated scale were assumed to be distributed horizontally the tubes bends. Three types of bends were considered: regular bends, short bends, and hairpin bends. The progressive increase in steam and tube temperatures along a single loop of superheater tubing and the ensuing variation of oxide scale thickness are considered. Numerical simulation results for a superheater loop made of TP347H austenitic steel indicated that tube blockage fractions larger than 50% are likely to occur within the first two years of boiler operation (with regularly scheduled outages) for outlet tube temperatures of 540-570°C, which is consistent with practical experience. Higher blockage fractions were predicted for tubes with hairpin bends than for tubes with regular bends, of length that are larger than five internal tube diameters. Finally, the blockage model presented can be used with some confidence to devise operating schedules for managing the consequences of oxide scale exfoliation based on projections of time to some critical blockage fraction for specific boiler operating conditions.
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Midou, Mickael, Julien Ninet, Alexandre Girard et Jean-Me´laine Favennec. « Estimation of SG TSP Blockage : Innovative Monitoring Through Dynamic Behavior Analysis ». Dans 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29458.
Texte intégralRésumé :
EDF operates a fleet of 58 Pressurized Water Reactors (PWR). The “health” of the Steam Generators (SGs) is an essential element contributing to the overall thermal efficiency of a PWR, and finally to the availability of the unit. Among the health issues that may affect SGs, secondary-side corrosion products transport in PWRs may lead to many problems: various contaminants, both particulates and dissolved species, will unavoidably accumulate and concentrate in the Steam Generator. One consequence is the fouling of the heat transfer and support structure interfaces within the SG on the secondary side, especially the U-tubes (fouling deposits on the outer walls of the U-tubes), and the tube support plates (TSPs) that support the U-tubes. The accumulation of the corrosion products may lead to 3 main safety risks that must be monitored: fluid-elastic instability of tubes in flow-accelerated areas, a reduction in SG water mass inventory and an increase in the risk of water level oscillation. It has also significant performance issues because of the decision to power derate of some EDF PWRs. Thus, a global strategy to monitor the fouling and TSP blockage issues and to schedule preventive and curative actions has been designed and is under deployment by EDF nuclear operator. This dedicated periodic test relies on the recording of the following measurements in stabilized configuration: steam pressure, feedwater flowrate and temperature, primary circuit temperatures, SG blowdown flowrate and SG water level (wide and narrow range). A more precise monitoring of potential TSP blockage situations would be an interesting help to operation and maintenance strategies: deposit build-up in TSP foils could be minimized, preventive chemical cleaning operations could be scheduled and a more efficient fleet wide SG Management Program (SGMP) could be designed in accordance with secondary side deposit issues. Consequently, EDF R&D is experimenting a new method based on modeling dynamics behavior of SGs to assess a spatially distributed estimator of the TSP blockage ratio. This method, based on a 1D physical model of the SG that simulates the complex dynamics of the two-phase flow phenomena inside the SG, consists in computing the wide range water level responses according to various configurations during a particular transient which is particularly sensitive to this phenomenon. The TSP blockage ratio estimator is then obtained by comparing the computed response curves to those measured on-site. This new method has the potential advantages of being fully non-invasive, of providing a quarterly update of the TSPs blockage estimator, and of requiring no additional measurements by processing available plant data. It is also capable of estimating the efficiency of a chemical cleaning after restarting the plant and checking the evolution and kinetics of eventual TSP re-blockage.
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Williams, Shazam, Mojghan Naseri, Joe Aleixo et Kristoffer Sandelin. « Field Experience and Laboratory Analysis of Oxidation Catalyst on Dual Fuel Engines ». Dans ASME 2006 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ices2006-1362.
Texte intégralRésumé :
A DCL oxidation catalyst for exhaust-gas cleaning has been field tested on a Wa¨rtsila¨ 50 series dual-fuel engine during 5000 hours of continuous operation in an end-user power plant application. The engine has been designed for continuous operation on natural gas (NG), light fuel oil (LFO) as well as heavy fuel oil (HFO), thus giving the consumer a wide variety of fuelling options. All three fuels were used at some point during the 5000 hours field trial. These fuels have different properties such as differing levels of sulphur and ash contents that affect the abatement efficiencies of the oxidation catalyst. A detailed study was performed to understand the effect of different fuels, lube oil poisoning and long running hours on the abatement performance of the oxidation catalyst. The oxidation catalyst was equipped with sample cores that were exchanged during scheduled engine maintenance periods. This allowed parallel field and laboratory evaluation of the emissions abatement and the quantity of lube oil deposits on the catalyst at successive intervals of engine running hours. We will show that the combination of the dual fuel engine and the oxidation catalyst is very robust, even for the different fuels, and it gives low emissions.
8
Marsh, Carl A. « Generator Recovery Project Case Study ». Dans ASME 2004 Power Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/power2004-52017.
Texte intégralRésumé :
The Generator Recovery Project Case Study is a technical paper that will discuss a project which started with a simple open, clean, and close of a 40MW air cooled generator and turned out to be much more. The unit experienced a gradual increase in winding temperatures over the last several years, with a more notable increase in phase B temperatures. In the history of the unit, it was observed that the unit became contaminated with carbonaceous deposits due to the environment in which it operated. Routine cleanings during scheduled outages were successful in lowering the increased temperature trends. With today’s market environment and an increasing commonality of extending outage intervals, the routine outage interval had been extended to 7 years from the previous outage. The scope of work was to remove the rotor, clean, inspect, test and return the unit to service in just over one week’s time. The requirements of the project were that the efforts be maximized so that the unit returned to service in the most economical means while adhering to practices that would maximize the unit’s availability and reliability. With findings of significant contamination of carbonaceous deposits and significant foreign object damage (FOD), the project lead to overwhelming questions and concerns. The case study will discuss the immediate concerns of the unknown, such as if the core was even recoverable and what was the source of FOD. The case study will walk through the questions raised and the actions taken to first assess the condition of the unit and what actions to be taken to recover the core damage, if at all possible. Most importantly, determining the source of FOD and the rectifications to eliminate future sources of FOD from this area. Detailed information on repair assessments and validation will be presented and procedures for repair and recovery will be discussed. Final testing and validation to return to service will be discussed and the operational characteristics after the repair will be revealed.
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Meszaros, K., C. Vrolyk, J. Pepin, M. Yarmuch et T. Mah-Paulson. « The Effects of Temper Bead Welding Technique on Weld Integrity for In-Service Welding of Carbon Steels ». Dans 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90242.
Texte intégralRésumé :
The maintenance of pipeline infrastructure is a significant integrity consideration for the pipeline industry. Employing traditional repair techniques, whereby to conduct repairs when the pipeline is shut-down and drained, can result in significant losses to revenue and production. There is industry demand for repair techniques that allow both scheduled and emergency ‘in-service’ weld repair techniques to be developed. As a result, in-service welding with the temper bead technique is becoming increasingly common for repair operations. During in-service welding, the two most prevalent metallurgical concerns are burn-through and hydrogen induced cracking (HIC). The risk of burn-through can be limited through appropriate welding parameter and heat input control during welding. The temper bead welding technique utilizes special bead placement to ensure appropriate heat flow throughout the weld zone to metallurgically improve resistance to HIC. In this study, a series of shielded metal arc welding (SMAW) coupons were produced on 0.250″ thick carbon steel plates subjected to water-cooling. Single and double-layer deposits were made. The second layer tempering bead heat input was purposely varied from plate to plate. The first layer of the welds were all performed using similar welding parameters, so the “tempering” effect from the second weld layer on the metallurgical properties of the resultant welds could be examined. To further expand the understanding of important procedural variables for in-service welding applications, this study investigates the effect of welder technique on the weldment properties achieved during temper bead welding.
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Kadbhane, Digambar J., et Avinash Y. Mahendrakar. « A Case Study of Failure of Pile Bore at Bridge Construction Project, Agra-Lucknow Expressway, India ». Dans IABSE Conference, Kuala Lumpur 2018 : Engineering the Developing World. Zurich, Switzerland : International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/kualalumpur.2018.0899.
Texte intégralRésumé :
<p>The Agra-Lucknow Expressway Project extends the connectivity of the state capital with the national capital with High-Speed Corridor. The proposed expressway starts on the Agra Ring Road near village Madra, and ends on SH-40 (Lucknow – Mohan- Hasanganj – Rasulabad road) outskirts of Lucknow. A Major bridge structure of total length 90 m is built for the physical obstacles without closing the way underneath a body of water for the purpose of providing passage over the obstacle on the SAI River. The project area is covered by a deep layer of alluvium spread range from sandy to the clayey loam by the slow-moving rivers of the Ganges system. Well foundations are generally preferred in such type of strata which are prone to collapse. Since construction of well foundation is time consuming, pile foundation were proposed to complete project within time.</p><p>In this case study, the collapse of the pile bore in liquefiable soil has been observed at abutment ‘A2’of the major bridge, at scheduled chainage 265+300. The bores in pile group collapse loose clayey sandy strata. This paper discusses the reasons of bore failure and the phenomenon of actual failure at liquefiable deposits. After studying the actual failure pattern some significant remarks are find out and accordingly the new pile group arrangement is suggested. The new design considering dead load, earth pressure, superimposed dead load, Live load, wind and seismic loading is based on rivet theory. Accordingly the numbers of pile are increased in the foundation to satisfy the design requirement</p>
Rapports d'organisations sur le sujet "Scheduled deposits"
1
Bennett, Steve, et Scott Beason, dir. Sigma Gamma Epsilon 47th Biennial Field Trip Guidebook. The Society of Sigma Gamma Epsilon, mars 2025. https://doi.org/10.62879/ftm2025bc01.
Texte intégralRésumé :
Welcome to the Field Trip Guidebook for the participants of Sigma Gamma Epsilon's 47th Biennial Convention, scheduled for April 12, 2025, in the Quad Cities, IL/IA. This guidebook provides detailed information for the field trip, which includes four important stops: the Fryxell Geology Museum at Augustana College, the Black Hawk Historic Site, the Continental Cement Company Quarry, and Wildcat Den State Park. Each location offers a unique opportunity to explore the region's geology and natural history. This guidebook will help you navigate each stop, providing relevant details and references to enhance your understanding of the sites visited during the trip. The participants of this field trip, part of SGE’s 47th National Convention, will be carrying on a tradition that began 95 years ago. In April 1930, the Gamma Chapter (University of Oklahoma) led a fossil-collecting trip to the Arbuckle Mountains in conjunction with SGE’s 8th National Convention. Two earlier conventions offered local sight-seeing tours to delegates, but the 1930 trip was the first geological field trip held in association with a convention – and a field trip to investigate the local geology has been a part of every SGE biennial convention ever since. If not for a snowstorm, the Iota Chapter (University of Michigan) would have gained this “first” when they hosted the 6th National Convention in April 1926. That field trip, which would have examined Pleistocene glacial deposits in the Ann Arbor area, had to be cancelled. The field trip is typically a convention highlight and the members of Delta Psi Chapter (Western Illinois University) are excited to carry on this important and fun SGE tradition.
2
Salcido, Charles, Patrick Wilson, Justin Tweet, Blake McCan, Clint Boyd et Vincent Santucci. Theodore Roosevelt National Park : Paleontological resource inventory (public version). National Park Service, mai 2022. http://dx.doi.org/10.36967/nrr-2293509.
Texte intégralRésumé :
Theodore Roosevelt National Park (THRO) in western North Dakota was established for its historical connections with President Theodore Roosevelt. It contains not only historical and cultural resources, but abundant natural resources as well. Among these is one of the best geological and paleontological records of the Paleocene Epoch (66 to 56 million years ago) of any park in the National Park System. The Paleocene Epoch is of great scientific interest due to the great mass extinction that occurred at its opening (the Cretaceous–Paleogene extinction event), and the unusual climatic event that began at the end of the epoch (the Paleocene–Eocene Thermal Maximum, an anomalous global temperature spike). It is during the Paleocene that mammals began to diversify and move into the large-bodied niches vacated by dinosaurs. The rocks exposed at THRO preserve the latter part of the Paleocene, when mammals were proliferating and crocodiles were the largest predators. Western North Dakota was warmer and wetter with swampy forests; today these are preserved as the “petrified forests” that are one of THRO’s notable features. Despite abundant fossil resources, THRO has not historically been a scene of significant paleontological exploration. For example, the fossil forests have only had one published scientific description, and that report focused on the associated paleosols (“fossil soils”). The widespread petrified wood of the area has been known since at least the 19th century and was considered significant enough to be a tourist draw in the decades leading up to the establishment of THRO in 1947. Paleontologists occasionally collected and described fossil specimens from the park over the next few decades, but the true extent of paleontological resources was not realized until a joint North Dakota Geological Survey–NPS investigation under John Hoganson and Johnathan Campbell between 1994–1996. This survey uncovered 400 paleontological localities within the park representing a variety of plant, invertebrate, vertebrate, and trace fossils. Limited investigation and occasional collection of noteworthy specimens took place over the next two decades. In 2020, a new two-year initiative to further document the park’s paleontological resources began. This inventory, which was the basis for this report, identified another 158 fossil localities, some yielding taxa not recorded by the previous survey. Additional specimens were collected from the surface, among them a partial skeleton of a choristodere (an extinct aquatic reptile), dental material of two mammal taxa not previously recorded at THRO, and the first bird track found at the park. The inventory also provided an assessment of an area scheduled for ground-disturbing maintenance. This inventory is intended to inform future paleontological resource research, management, protection, and interpretation at THRO. THRO’s bedrock geology is dominated by two Paleocene rock formations: the Bullion Creek Formation and the overlying Sentinel Butte Formation of the Fort Union Group. Weathering of these formations has produced the distinctive banded badlands seen in THRO today. These two formations were deposited under very different conditions than the current conditions of western North Dakota. In the Paleocene, the region was warm and wet, with a landscape dominated by swamps, lakes, and rivers. Great forests now represented by petrified wood grew throughout the area. Freshwater mollusks, fish, amphibians (including giant salamanders), turtles, choristoderes, and crocodilians abounded in the ancient wetlands, while a variety of mammals representing either extinct lineages or the early forebearers of modern groups inhabited the land. There is little representation of the next 56 million years at THRO. The only evidence we have of events in the park for most of these millions of years is isolated Neogene lag deposits and terrace gravel. Quaternary surficial deposits have yielded a few fossils...
3
Haeckel, Matthias, et Peter Linke. RV SONNE Fahrtbericht/Cruise Report SO268 - Assessing the Impacts of Nodule Mining on the Deep-sea Environment : NoduleMonitoring, Manzanillo (Mexico) – Vancouver (Canada), 17.02. – 27.05.2019. GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, novembre 2021. http://dx.doi.org/10.3289/geomar_rep_ns_59_20.
Texte intégralRésumé :
Cruise SO268 is fully integrated into the second phase of the European collaborative JPI-Oceans project MiningImpact and is designed to assess the environmental impacts of deep-sea mining of polymetallic nodules in the Clarion-Clipperton Fracture Zone (CCZ). In particular, the cruise aimed at conducting an independent scientific monitoring of the first industrial test of a pre-protoype nodule collector by the Belgian company DEME-GSR. The work includes collecting the required baseline data in the designated trial and reference sites in the Belgian and German contract areas, a quantification of the spatial and temporal spread of the produced sediment plume during the trials as well as a first assessment of the generated environmental impacts. However, during SO268 Leg 1 DEME-GSR informed us that the collector trials would not take place as scheduled due to unresolvable technical problems. Thus, we adjusted our work plan accordingly by implementing our backup plan. This involved conducting a small-scale sediment plume experiment with a small chain dredge to quantify the spatial and temporal dispersal of the suspended sediment particles, their concentration in the plume as well as the spatial footprint and thickness of the deposited sediment blanket on the seabed.