Shipping Route Evaluations

The Army asked the Construction Engineering Research Laboratories (CERL) to implement a prototype capability which will allow CERL to evaluate potential environmental risks associated with proposed actions. The emphasis of this work was in the Global Commons areas. This evaluation capability was used to support the generation of a document similar in format to an EIS. The purpose was to evaluate the environmental risks associated with different standard shipping routes for cargo in Western Europe to be shipped to an incineration site in the Pacific. This presentation illustrates some of the 70 concerns which went into the dozen analyses used to evaluate the different routes.

Four standard routes were feasible. For each of the alternatives, the characteristics of that route were determined by generating a report for each of the seventy data types and each of the twelve analyses. For example, for the first potential route , a histogram of the characteristics of that path was developed. This characterization was then reviewed by an expert and written statements about the significance of each of the 82 findings were made for the four routes, 328 evaluations in all.

By looking at the different GRASS map layer category reports one can compare the Potential Environmental Risk of an action for each route under consideration. For Example:

  • Humpback Whales: Route 2 covers over 5 times as much square mileage as does Route 1 of the Humpback Whale migration and feeding locations.
  • Walrus/ Seal Habitat: Both routes have about the same coverage of seal habitat.
  • Phytoplankton Productivity Near the Ocean Surface & Biomass at the Ocean Floor: The longer Route 2 covers less square area of high phytoplankton productivity(Route 2 approx 42 square miles of 200-500 milligram/square meter productivity category compared to approx 67 square miles for Route 1). Route 1 has some very high floor productivity (3.7k square miles of 10-50 grams of biomass per square meter). In the more moderate productivity ranges (1-10 g/sq m) they are within about 20% of equal coverage. Considering Route 2 is about 30% longer, that means there is not much difference between the two routes.

    Other Data:

  • Topographic and Bathymetric Data
  • Aspect (direction of Slope) & Biological Zones Data
  • Fisheries Areas
  • Blue Fin Tuna Areas
  • Billfish Sensitivity Areas
  • Territorial Ownership & Exclusive Economic Zones
  • Weather Hazards
  • Shipping Hazards
  • Summarized Environmental Concerns & Summarized Shipping Hazards

    Taking a Closer Look

    The global analysis indicated that there were a few areas of very high sensitivity. They were:
  • The Caribbean
  • The Indonesian Archipelago
  • The Southern Tip of Africa
  • The Southern Tip of South America
  • Northwestern Europe & the British Isles

    Thus, these specific areas were examined individually using all of the data sets and all of the same analyses. In addition, alternative routings through these areas were compared to get a sense of the tradeoffs associated with modifying the standard shipping routes. For example, by going north of the British Isles, the potential to human populations was significantly decreased.

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