1) How does peak discharge data for Mercer Creek from the most recently recorded
ID: 293838 • Letter: 1
Question
1) How does peak discharge data for Mercer Creek from the most recently recorded decade, 1999-2009, compare to the peak discharge data for each of the 11-year records for 1957-1967 and for 1979-1989?
2) Would the predicted discharge for a 100-year flood on Mercer Creek based on 1999-2009 data be larger or smaller than the predicted discharge for the 100-year flood based on 1957-1967 data? Explain.
Recurrence Interval at Mercer Creek 1600 y-232.29In(x)+ 295.11 R2-0.9374 1400 1200 0 1000 800 1957-1967 1979-1989 Log (1957-1967) Log. (1979-1989) 600 y-39.914|n(x) + 165.78 R2 0.9195 400 200 0 100 Recurrence IntervalExplanation / Answer
1. The peak discharge data for Mercer Creek from the most recently recorded decade, 1999-2009, is very high (> 900 cubic feet) from 1957. The peak discharge data for each of the 11-year records for 1957-1967 very low (<300 cubic feet) and for 1979-1989 is high compared to 1957 -1967 ( mostly 400-900 cubic feet).
2. The predicted discharge for a 100-year flood on Mercer Creek based on 1999-2009 data be larger than the predicted discharge for the 100-year flood based on 1957-1967 data. Beacause of Annual peak stream flow is high in 1999-2009
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