Research Journal of Applied Sciences

Year: 2010
Volume: 5
Issue: 4
Page No. 254 - 259

A GIS Based Cost Distance Modeling for Oil Spill Hazard Assessment in the Coastal Areas of South Eastern Nigeria

Authors : Joseph C. Udoh

Abstract: As long as petroleum oil is exists, it will be discharged (accidentally or incidentally) in the environment especially in the area where the oil is found. As a hazard, oil spill puts the people and environment that it occurs in danger. Hence, it is better to better to prepare for a spill than to be caught unawares by it. Hazard assessment conveys information on the likelihood of future hazardous events in the specific environment concerned. It involves two main components-temporal and spatial analysis. The objective of this study is to assess oil spill hazard using spatial analysis modeling techniques in South Eastern Nigeria; an environment plagued with lack of appropriate in situ oil spill historical data that can be used for the probabilistic modeling. Hazard sources and impedance surfaces are the two main components needed to model oil spill hazard in this study. The modeling environment was provided by Cost Distance tool in Arcmap Spatial Analyst extension. Using each of the identified hazard sources, hazard surfaces were created to reflect the movement of oil over each impedance surface. The final hazard surface was created by prioritizing and weighting the hazard surfaces and finally zoning the resultant surface into hazard classes. The matrix of the final Hazard surface shows the very high and high zones together with the High Hazard Zone form 63.75% of the study area while the moderate and marginal zone constitutes 36.25%. The information provided by the study is very effective in oil spill contingency planning.

How to cite this article:

Joseph C. Udoh , 2010. A GIS Based Cost Distance Modeling for Oil Spill Hazard Assessment in the Coastal Areas of South Eastern Nigeria. Research Journal of Applied Sciences, 5: 254-259.

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