Design and Model Testing of an Arctic Seawater Intake for Sedimentation and Wave Effects

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by Jack C. Cox, ARCTEC Inc, Columbia, MD, USA,
Daniel L. Behnke, ARCTEC Inc, Columbia, MD, USA,
William G. Grosskopf, ARCTEC Inc, Columbia, MD, USA,
Jerry L. Machemehl, ARCTEC Inc, Columbia, MD, USA,

Document Type: Proceeding Paper

Part of: Civil Engineering in the Arctic Offshore

Abstract: A seawater intake structure is being designed to provide flood water for tertiary recovery of oil from the Kuparuk oil field near Prudhoe Bay, Alaska. A wave effects study establishes the expected range of wave conditions, both height and period, which could reach and overtop the intake, and how the intake would be affected in terms of structural loads and resonant wave behavior. An estimate of the overland propagation of an overtopping wave is required to establish safe setbacks and elevations for the seawater treatment building. For sedimentation, a distorted, movable bed model is used to aid in the siting and orientation of the intake using scaled sediment material. Erosion and deposition patterns are examined for various intake orientations, and a design which takes advantage of local current patterns to minimize maintenance dredging by inducing scour at the face is developed.

Subject Headings: Sediment | Model tests | Sea water | Water intakes | Wave overtopping | Structural behavior | Bed materials | Arctic | North America | Alaska | United States

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