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<br />5.4 <br /> <br />5.2.1.2 Without-Berm Flood Scenario <br />Figures 5.3 and 5.4 present the maximum deptl and velocity value:; pr'edicted <br />for the water flood, without-berm, obstructed channel scenario over the entire <br />fan. Results for this flood condition are similar to those predicted for the <br />with,berm condition. Depths on the eastern hal I' of th{! fan are seen to be <br />s 1 i ghtl y greater than for the with-berm cond it ion, I-en ect i ng increased potent i a 1 <br />for f1 ows whi ch escape the exi st i ng channel to follow a course toward the eas t. <br />Flow velocities over the fan were found to range between 1 and 7 fps. <br /> <br />5.2.2 Mud Flow <br />5.2.2.1 With-Berm Flood Scenario <br />Hydraul ic model ing results for the mud fl ow, with,berm, unobstructed <br />channel flood condition are illustrated on Figures 5.5 and 5.6. Figure 5.5 shows <br />the maxi mum depths predi cted over the fan. Fi gure 5.6 defi nes the max i mum <br />velocities determined for flood flows on the fan, The limits of inundation are <br />confined primarily to the western half of thl~ fan. Flow depths range froll <br />between 1 to 7 feet. Maximum flow velocities are less than 5 fps. <br /> <br />5.2.2.2 Without-Berm Flood Scenario <br />This scenario assumed that the channel was blocked at the fan apex during <br />the passage of the frontal wave, such that subsequent flood flows were free to <br />fonowa course dictated by the topography, roughness, and flow obstructions on <br />the fan. Figure 5_7 shows the maximum depth contours for the without-berm flood <br />scenario. Compared to the with-berm condition, a much wider area of inundation <br />is indicated from the figure. A large portion of the eastern side of the fan <br />is expected to be inundated to depths up to 2 feet. Maximum 1'10\11 velocities <br />predicted for this flood scenario are shown on Figure 5.8. Velocities generally <br />range from between 2 to 8 fps. <br />