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Discharge Estimation for Noninstrumented Sites |
Flow was estimated at the four noninstrumented sites; namely, East Highway Creek, Oregon Creek,
Stillwater Creek (prior to mid-1999), and East Creek. The analysis performed in Long Sound for
East Highway Creek, Oregon Creek, and Stillwater Creek used 15-minute discharge data from West
Highway Creek as the independent variable and instantaneous ADCP discharge measurement data at the noninstrumented site as the dependent
variable (Hittle and others, 2001). For East Creek, the analysis used 15-minute discharge data from
Mud Creek as the independent variable and instantaneous
ADCP discharge measurement data at East Creek as the dependent variable (Hittle and others, 2001).
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Discharge estimation formulas for East Highway Creek, Oregon Creek and Stillwater Creek were revised
after publication of Hittle and others (2001, p. 17) and are presented in table 2. These new formulas
utilize the improved West Highway discharge rating (eq. 1).
Periodic discharge and salinity measurements were taken, and a comparison was made against
corresponding measurements for instrumented sites. Alternate equations were developed for use during
periods of missing discharge record at West Highway Creek (table 2).
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