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 Page 14 Upper and Lower Emerald Valley Dam Failure Report <br /> January 23, 2015 <br /> <br /> <br />Guidance for estimation of initial values for the lumped resistance parameter <br />Kn was taken from HBRPEG, 2008. During the calibration phase of the <br />modeling this value was reduced to 0.2. A summary of the physical basin <br />parameters and initial selection of the unit hydrograph values is presented in <br />the following figures. <br /> Figure 16: Above Dams SB_1 Unit Hydrograph <br /> <br />Figure 17: Above Dams SB_2 Unit Hydrograph <br />