نتایج جستجو برای: oil spills
تعداد نتایج: 139443 فیلتر نتایج به سال:
Edge detection technology of oil spills image on the sea is one of most key technologies to monitor oil spills on the sea. In this paper, we present a novel region-based active contour model for oil spills remote sensing images. In the proposed model, we define a local Gaussian distribution fitting energy term, and this energy term is introduced into a global minimization active contour framewo...
The devastating environmental impacts of the Exxon Valdez spill in 1989 and its media notoriety made it a frequent comparison to the BP Deepwater Horizon spill in the popular press in 2010, even though the nature of the two spills and the environments impacted were vastly different. Fortunately, unlike higher organisms that are adversely impacted by oil spills, microorganisms are able to consum...
We present a methodology to detect oil spills using MODIS near-infrared sun glittered radiance imagery. The methodology was developed by using a set of seven MODIS images (training dataset) and validated using four other images (validation dataset). The method is based on the ratio image R = L'GN/LGN, where L'GN is the MODIS-retrieved normalized sun glint radiance image and LGN the same quantit...
Stability of water ecosystems is often disturbed by dangerous chemicals – products of human activities having negative economical and environmental impact. Oil spills are typical examples of these dangerous chemicals. They are eliminated with different strategies, e. g. self-cleaning of water surface, usage of booms, collectors of oil spills or autonomous robots. This paper investigates the app...
Mortality of Marbled Murrelets (Brachyramphus marmoratus) due to oil pollution is one of the major threats to murrelet populations. Mortality from large spills and chronic oil pollution has been occurring for several decades but has been documented poorly throughout their range; it probably has contributed to declines in populations, in conjunction with loss of nesting habitat and mortality in ...
Seabirds exposed to even a dime-sized amount of oil can die of hypothermia in cold-water regions, but despite repeated requests by Environment Canada, offshore oil operators are failing when it comes to self-monitoring of small oil spills, says new research. Chronic pollution from many small oil spills may have greater population-level impacts on seabirds than a single large spill, suggest rese...
in last decades, oil spill pollution has become an important issue of concern due to its serious environmental impacts; therefore, necessary actions should be taken to prevent or reduce these types of pollution and their environmental consequences. natural organic sorbents are emerging as proper choices for oil spill cleanup due to their availability, eco-friendliness, and low cost. in this stu...
Many satellite-borne image data have been acquired in the Arabian Gulf since the mid 80’s by different space agencies and have demonstrated oil spill related features at sea. Severe oil spills were caused occasionally by accidental or deliberate oil sludge dumping from passing ships. Serious damage to fishery, water desalination plants and natural habitats are concerned. The work done is the fi...
We present new mathematical and geological models to assist civil protection authorities in the mitigation of potential oil spill accidents in the Eastern Mediterranean Sea. Oil spill simulations for 19 existing offshore wells were carried out based on novel and high resolution bathymetric, meteorological, oceanographic, and geomorphological data. The simulations show a trend for east and north...
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