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Table 19. Measured versus predicted Water Surface Elevations (WSE) for the measured flows at Quarry study site. ----------------------------------------------------------------------------- 1081 cfs 2538 cfs 5364 cfs 9058 cfs 10736 cfs Meas. Pred. Meas. Pred. Meas. Pred. Meas. Pred. Meas. Pred. WSE WSE WSE WSE m 1 85.80 85.70 86.96 87.08 88.52 88.65 90~~;16 90 . 17 90.94 90.70 2 86 . 19 86.07 87.30 87.44 88.83 88.98 90.39 90.43 91.19 90.94 3 86.61 86.48 87.61 87.75 89.07 89.21 90.68 90.62 91.37 91.12 4 86.74 86.65 87.79 87.94 89.22 89.39 90 . 72 90.78 91.45 91. 27 5 86.78 86.74 88.01 88.05 89.45 89.53 90.83 90.94 91. 62 91.44 6 87 . 17 87.07 88.22 88.36 89.63 89.78 91.09 91.10 91.73 91. 56 7 87.43 87.30 88.44 88.57 89.73 89.95 91.20 91. 23 91. 92 91.67 all transects and measured discharges (Table 20). Similarly, the precision of the ratios between measured and predicted discharge from the IFG4 program also fall within the limits of a "good" calibration data deck with the ratios between 0.99 and 1.02 (Table 21). 3. Calculation of WeiQhted-Usable-Area The fish life stages of interest at the Quarry study site include adult (400+ mm) Colorado squawfish year round and deposition from mid-June to September, and adult razorback suckers (400+ mm) from May through June and July through October. At the Quarry study site the WUA for adult Colorado squawfish was maximized at a flow of 3000 cfs, with a 90 percent habitat retention level between flows from 2500 to 4500 cfs (Table 22). For the depositional life stage, WUA is maximized at 4500 cfs, with a flow window between 1500 and 6000 cfs. For razorback suckers, the WUA maximizes at a flow of 6000 cfs during the months of May and June, and 3000 cfs during July through October. 31