A Stochastic Simulation Model of Oil Spill Fate and Transport PDF Download

Author: A. H. Al-Rabeh
Publisher:
ISBN:
Category : Modeling
Languages : en
Pages :

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Author: Committee on Understanding Oil Spill Dispersants: Efficacy and Effects
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 408

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Book Description
Approximately 3 million gallons of oil or refined petroleum products are spilled into U.S. waters every year. Oil dispersants (chemical agents such as surfactants, solvents, and other compounds) are used to reduce the effect of oil spills by changing the chemical and physical properties of the oil. By enhancing the amount of oil that physically mixes into the water, dispersants can reduce the potential that a surface slick will contaminate shoreline habitats. Although called for in the Oil Pollution Act of 1990 as a tool for minimizing the impact of oil spills, the use of chemical dispersants has long been controversial. This book reviews the adequacy of existing information and ongoing research regarding the effectiveness of dispersants as an oil spill response technique, as well as the effect of dispersed oil on marine and coastal ecosystems. Oil Spill Dispersants also includes recommended steps for policy makers faced with making hard choices regarding the use of dispersants as part of spill contingency planning efforts or during actual spills.

Author: xiaomei zhong
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Growing transportation of diluted bitumen blends and vessel traffic in the Salish Sea, BC coast could increase the risk of marine oil spill. Understanding the fate and behavior of spilled oil are of importance to help with oil spill response. A high-resolution oil spill model, the Oil Spill Contingency and Response (OSCAR) model was used to conduct a hindcast study of the M/V Marathassa oil spill in the English Bay (part of the Salish Sea) and the comparison of modeled and observed trajectories showed agreements for 70% of the locations. Following model validation, the influences of oil discharge location, discharge volume, and oil type on the fate and behavior of oil were studied. The stochastic modeling result indicated that these studied factors significantly affect the area and probability of oil contamination.

Author: Xiao Zheng
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Oil spills have been regarded as one of the major contributors to marine pollution. With the rapidly changing environmental conditions and the diverse uncertainties in the data associated with the observation or meteorological and oceanographic data, the simulation of an oil spill is challenging to be accurate and reliable enough for supporting response management. Furthermore, with the different assumptions, structures and translations of various simulation models, results could significantly vary even with the same inputs. The objectives of this research are therefore 1) to compare three widely used models for offshore oil spill simulation and evaluate their capabilities under harsh environmental conditions; and 2) to develop a Design of Experiment (DOE) based approach for analyzing uncertainties associated with the spill modeling input and parameters to help improve offshore oil spill simulation. In this research, the Terra Nova oil spill occurred on November 21, 2004, the largest oil spill in offshore Newfoundland, was chosen as a case study. The models, namely GNOME/ADIOS2 and OSCAR, were employed for the simulation of fate and transport of the spilled oil. During the simulation, ocean currents data from the Hybrid Coordinate Ocean Model (HYCOM) and surface wind data measured by the National Climate Data Center (NCDC) were used. The simulation results indicated that 43.7% of the spilled oil evaporated or dispersed in the first two days. With the model of OSCAR, 87.4% of the total spilled oil was evaporated or dispersed, while 10.8% was biodegraded. Only 1.6% of oil remained on the sea surface after six days, which agreed well with the historical data. The results from GNOME showed a more reasonable match with the observations from the RADARSAT-1 satellite images regarding the spill plume, shape and location as compared to those from OSCAR. But on the other hand, OSCAR showed better performance in simulating weathering process. To facilitate a better understanding of the oil fate and transport, and to improve simulation performance, a DOE aided method was developed for sensitivity analysis, parameter calibration and interaction analysis of key factors during spill simulation. The interactions between wind speed and direction, and the currents have been analyzed and the effects of their interactions have been studied. In this case study, the key factors "Windage" and "Wind speed scale" both had the negative effects on the modeling response, but their interaction showed positive effects. The "Along current uncertainty" and "Diffusion coefficient" caused the negative and positive effects, respectively, but leading to the positive effects by their interaction. The results indicated that when adjusting the primary factors in order to optimize the response, interactions between factors may lead an opposite way and missed the optimal solution. The validation through the case study showed consistency with high values of R2 (e.g., 0.93 and 0.95 for deviations of coverage and distance between the observed and simulated spills respectively). The results indicated that this DOE aided parameterization method could potentially be a useful tool for the evaluation of the contribution of multiple parameters and be applied as a new calibration method for other oil spill simulation models.

Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
ISBN: 0309478219
Category : Nature
Languages : en
Pages : 341

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Whether the result of an oil well blowout, vessel collision or grounding, leaking pipeline, or other incident at sea, each marine oil spill will present unique circumstances and challenges. The oil type and properties, location, time of year, duration of spill, water depth, environmental conditions, affected biomes, potential human community impact, and available resources may vary significantly. Also, each spill may be governed by policy guidelines, such as those set forth in the National Response Plan, Regional Response Plans, or Area Contingency Plans. To respond effectively to the specific conditions presented during an oil spill, spill responders have used a variety of response optionsâ€"including mechanical recovery of oil using skimmers and booms, in situ burning of oil, monitored natural attenuation of oil, and dispersion of oil by chemical dispersants. Because each response method has advantages and disadvantages, it is important to understand specific scenarios where a net benefit may be achieved by using a particular tool or combination of tools. This report builds on two previous National Research Council reports on dispersant use to provide a current understanding of the state of science and to inform future marine oil spill response operations. The response to the 2010 Deepwater Horizon spill included an unprecedented use of dispersants via both surface application and subsea injection. The magnitude of the spill stimulated interest and funding for research on oil spill response, and dispersant use in particular. This study assesses the effects and efficacy of dispersants as an oil spill response tool and evaluates trade-offs associated with dispersant use.

Author: Ahmed El-Nemr
Publisher: Nova Publishers
ISBN: 9781594546150
Category : Nature
Languages : en
Pages : 156

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Book Description
The book describes the oil spill and its fate in the marine environment and clarifies how to treat and reduce oil input in coastal and offshore waters. How much oil is entering the world-wide marine environment is also discussed. The ecological impacts of oil spills and the hazardous effects of petroleum on marine habitats are also discussed.

Author: G. Passerini
Publisher: WIT Press
ISBN: 1784664332
Category : Transportation
Languages : en
Pages : 318

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Book Description
Better urban transport systems and the need for a healthier environment are continuous requirements that create a fertile atmosphere for original ideas, innovative approaches and applications of advanced technologies, their tests and evaluations in practice. Moreover, there is a growing need for integration with IT systems and applications to improve safety and efficiency. Meanwhile, the substantial growth of maritime shipping has resulted in large transported quantities around the world, creating a demand for innovative solutions for ports and fleets. The apparently parallel topics of Urban Transport and Maritime Transport meet in the transport and environmental management of coastal cities, both being affected positively and negatively by landslide and seaside traffic. Maritime Transport is highly interconnected with rail, road and air services, as well as inland waterways. Each of these must therefore operate complimentary of one another to maximise efficiency and respond rapidly to variable economic and political contingencies. The variety of topics covered in this volume reflects the complex interaction of transport systems with their environment and the need to establish integrated strategies. The goal is to arrive at optimal socio-economic solutions while reducing the negative environmental impacts of transportation systems typically by interdisciplinary approaches.

Author: Hung Tao Shen
Publisher:
ISBN:
Category : Great Lakes (North America)
Languages : en
Pages : 104

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Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 962

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Author: Carlos Guedes Soares
Publisher: CRC Press
ISBN: 1482233002
Category : Technology & Engineering
Languages : en
Pages : 1136

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Book Description
Covering recent developments in maritime transportation and exploitation of sea resources, encompassing ocean and coastal areas, this book is intended for academics and professionals involved in the development of marine transportation and the exploitation of sea resources.