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COMPTUEX/JTFEX EA/OEA Final Appendix NAPPENDIX NESTIMATED ZONES OF INFLUENCE (ZOI) FOR MARINE MAMMALS DURINGUNDERWATER DETONATIONSZONE OF INFLUENCE FOR THE MK83 DURING ASM OPERATION OPERATIONS IN SOARModel Inputs (Assumptions)Explosive type and weight: 445 lb (202 kg) of H6.Explosive depth: 5 ft (1.5m) under the water surface.Sound Velocity Profile: March and September SVPs were acquired from The Naval OceanographicOffice (NAVOCEANO) web site at location of 33º N, 119º W.SOAR Location: 33ºN, 119ºWSediment properties: The averaged ocean bottom at this site is approximately 5,108 ft (1,557 m) deep.The sediment at test site was described as silt. The sound speed ratio of 0.994 and density of 1.421 g/cm 3were used as inputs to the Hamilton equation for the model run.Model OutputsThe energy flux density in 1/3-octave bands, peak pressure, positive impulse pressure and total energywere obtained from REFMS model at the following receiver depths and ranges.Depth: 5, 15, 50, 100, 150, 200, 300, 450, 600 and 750 mRange: 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 1, 2 and 3 nmResultsREFMS results shown in the following were compared with various harassment thresholds for the marinemammals to determine the zone of influence (ZOI).1. TTS Harassment: >182 dB (energy flux density) or > 12 psi (peak pressure) or > 23psi (peakpressure)2. 50 % Tympanic Membrane (TM) rupture: 205 dB in total energy3. Onset of slight lung injury: > 13 psi-ms (positive impulse pressure), indexed at the surface(Goertner’s modified impulse pressure) for animal size of a calf dolphin4. Onset of extensive lung injury: > 30.5 psi-ms (positive impulse pressure), indexed at the surface(Goertner’s modified impulse pressure) for animal size of a calf dolphin.N-1 February 2007