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U.S. Geological Survey Open-File Report 2012-1234

Application of a Hydrodynamic and Sediment Transport Model for Guidance of Response Efforts Related to the Deepwater Horizon Oil Spill in the Northern Gulf of Mexico Along the Coast of Alabama and Florida

Title Page | Contents | List of Figures | List of Tables | Conversion Factors | Abbreviations | Executive Summary | Introduction | Methods | Results | Digital Data Files | Discussion | Summary and Conclusions | References Cited | Appendix 1. Scenarios | Appendix 2. Example Model Input Files | Appendix 3. Calculations of Mobility and Potential Flux | Appendix 4. File Naming Conventions | Appendix 5. Time Step of Maximum Ebb and Flood for Inlets in the Model Domain

Figure 8, variability of critical shear stress with diameter.
Figure 8. Critical shear stress (in Pa) of surface residual balls (SRBs) along the Alabama and Florida Gulf coast as a function of diameter (in cm). Shown are values calculated using the original Shields (1936) formulation, and a modified version accounting for exposure wherein the dimensionless sheer stress approaches a constant value for particles that are partially exposed (0.1) or fully exposed (0.2; see appendix 3).
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