Mass-gravity flows pose major hazards for deepwater pipelines

Two recent ultra-deepwater pipeline projects have encountered mass-gravity flows as significant geohazards.The pipelines are the Shell Malampaya Pipeline in the Philippines and the Gazprom Blue Stream Pipeline across the Black Sea.These and other deepwater projects point out the need for methods quantitatively to assess these risks in a wide variety of deep seafloor terrains.Rare, unpredictable flows On this relief map of the seafloor off the coast of Mindoro Island, deep incised channels and levee systems are the result of turbidity currents (Fig. 1).Click here to enlarge imageIn some deepwater and continental slope environments (Fig. 1), high-resolution bathymetry data have revealed st...

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