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Map Name: NZ_Oil_Spill_Risk_Rating
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2193
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Title: MyProject.aprx
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Comments: The likelihood of a marine oil spill has been modelled using oil and vessel movement information from the New Zealand oil, marine and fishing industries, and Maritime New Zealand and international incident data as appropriate.The risk rating combines the assessed environmental sensitivity value of this coastline with the calculated likelihood of an average sized oil spill occurring. A coastline with a high calculated probability of spills coming ashore higher and/or particular sensitivity to the effects of oil will have a higher risk rating whereas a region with a low probability and/or low potential impact will have a low rating.Rating Calculation MethodologyThe risk rating is the product of:Probability: A true quantitative scale of incidents per yearSensitivity value: An arbitrary interval scaleRating: Five-step order of magnitude scale (approximating natural log)Assessed Environmental SensitivityThe framework for assessing the consequences of oil spills on coastlines is a modification of that used by the 2004 MOSRA Project. The sensitivity is rated using a order-of-magnitude scale and considers the effect of oil and the longevity of that effect (across seasons). Each region is rated based upon the worst-case (time of year) using a scale that assesses the sensitivity of the area to oil spills in terms of environmental factors (i.e. shoreline character, plants and animals) and human factors (i.e. economic, cultural and amenity value). These ratings produce a sensitivity profile for each section of coast and, when combined with the likelihood of spilt oil being present, are used to derive a risk rating.
Subject: 20km coastal 'cells' that form the basis for an assessment of the environmental and social sensitivity to oil spills and the calculated risk associated with current vessel activity and associated movement of oil. The colours reflect the resulting lev
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Keywords: Environment,Pollution,Oil Spill,Infrastructure
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