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| Ibe, A.C.. |
| In the recent past, climatic changes and variations have occurred in Nigeria with resulting adverse socio-economic impact. From these experiences, it is inferred that the expected change in global climate will have far reaching disastrous consequences for Nigeria if appropriate anticipatory technical and policy Measure are not taken. More recent results from various models based on an eventual warming from a doubling of greenhouse gases of between 1.5 and 5oC by the end of the 21st century predict an acceleration of the eustatic rise in sea level from 1.2-1.5mm/yr. over the last hundred year s to 4 – 6mm/yr. although previous estimates were much higher [e.g.56–3.68m by the end of the 21 century] on the low lying Coastal zone of Nigeria, which is rich in... |
| Tipo: Report |
Palavras-chave: Coastal zone management; Climatic changes. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/2406 |
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| Ibe, A.C.. |
| The coastal zone and oceans surrounding Sub-Saharan Africa, with their vast resources of food, energy, and minerals, not only are composed of various fragile ecosystems, but are scenes of a variety of often conflicting uses. At present, the uncontrolled development of the coastal zone and ocean and the almost haphazard exploitation of their natural resources threaten to turn the promise of economic prosperity into an environmental nightmare that portends great dangers for present and future generations. There is the urgent need to put in place national management policies that address the environmental controls and procedures to be applied in pursuit of economic development. However, the oceans have no physical boundaries corresponding to national... |
| Tipo: Book Section |
Palavras-chave: Coastal zone; Environment management. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/273 |
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| Ibe, A.C.. |
| Previously published data and preliminary indications from research now in progress suggest the possible occurrence in offshore Nigeria of economically viable deposits of placer minerals (including heavy minerals), sand and gravel, phosphorite, glauconite, polymetalic manganese nodules etc. In addition, new stratigraphic evidence indicates the existence of potentially rich petroleum plays associated with a Tertiary canyon system in water depths beyond the limits of present exploitation. Based on the comparative geology of similar occurrences in better explored continental margins and ocean basins elsewhere, the possible origin, abundance and distribution of these resources are adduced. A brief assessment of the technology relevant to their discovery and... |
| Tipo: Report |
Palavras-chave: Economic feasibility; Offshore; Mineral resources. |
| Ano: 1982 |
URL: http://hdl.handle.net/1834/1207 |
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| Ibe, A.C.; Ajayi, T.O.. |
| Published information favour the occurrence in certain years of wind related upwelling in Nigeria's inshore waters especially between July and September. This is corroborated by the prevalence of petroleum source beds, glauconite, phosphorite and periodic abundance of some fish including Engraulis encrassicolus, Sardinella maderensis and the bonga Ethalmosa fimbriata which are pelagic and are associated with upwelling phenomena. Examination of temperature and salinity data for 1978 - 81 suggested that upwelling occurred during certain periods of each year. However, wind data for the same period lacked details to support postulates of wind driven upwelling. Instead, dynamic upwelling resulting from the juxtaposition of the currents in the area is... |
| Tipo: Report |
Palavras-chave: Coastal upwelling. |
| Ano: 1985 |
URL: http://hdl.handle.net/1834/2444 |
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| Ibe, A.C.; Antia, E.E.. |
| Previous studies by various agencies have shown that widespread erosion is occurring on the Nigerian shoreline and in some places, the rate of shoreline retreat is so rapid as to be alarming. Shoreline stabilisation methods adopted for combating erosion along our coasts have been counter-productive and, in many cases, aggravated the problem largely because such solutions had been, and are being, carried out without consideration or understanding of fundamental principles of shoreline dynamics and processes. Following a review of case histories, the Nigerian Institute for Oceanography and Marine Research initiated in September, 1981 a data acquisition programme aimed at making a scientific input into long term and large scale coastal management planing in... |
| Tipo: Report |
Palavras-chave: Environmental protection; Shoreline erosion; Environmental protection; Http://aims.fao.org/aos/agrovoc/c_15898. |
| Ano: 1983 |
URL: http://hdl.handle.net/1834/1206 |
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| Ibe, A.C.; Inegbedion, L.E.; Egberongbe, F.A.O.; Orupabo, S.. |
| The dynamic state of the Nigerian shoreline, dominantly erosional has been a source of concern to various state and Federal Governments particularly in the past few decades because of the enormous adverse socio-economic implementation it engenders. An ability to predict the future behavioural patterns of the Nigerian shoreline affords an invaluable scientific input into long term and large scale managerial planning for the Nigerian coastal zone. This paper documents a first attempt at formulating a mathematical model for beach states in Nigeria using Victoria bar beach as a case study. A controlled section of the beach was selected while measurements of some of the variable characteristics were carried out periodically. While it is ultimately desirable to... |
| Tipo: Report |
Palavras-chave: Beach erosion; Beach morphology. |
| Ano: 1989 |
URL: http://hdl.handle.net/1834/2434 |
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