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<br />. <br /> <br />~ <br />-.J <br />~ <br />0:) <br /> <br />. <br /> <br />. <br /> <br />2. Gagi ng Station Data - USGS <br /> <br />On February 11, 1978, letters were sent to USGS District Chiefs in <br /> <br /> <br />the four UCRB States, requesting data specific to the gaging sta- <br /> <br /> <br />tions associated with the reaches selected to provide initial data <br /> <br /> <br />for representative reach simulation. Data requested included: <br /> <br />a. Cross-section showing shape of stream bed and banks at station, <br /> <br />b. Discharge measurment notes for the past five years, <br /> <br />c. Rating curve and/or table, <br /> <br />d. Dates when rating curve was changed over the past ten years. <br /> <br />e. Position (location) of gage in relation to cross-section, <br /> <br />f. Gage/height relationship necessary to determine actual depth of <br /> <br /> <br />water at the gage (area figure alone is not enough), and <br /> <br />g. Discharge at gage when' stream is bank full, i.e., the stage at <br /> <br /> <br />which water first begins to overflow either of the banks at the <br /> <br /> <br />station. In the absence of actual bank-full data, an estimate <br /> <br />was requested. <br /> <br />As in the case of historic flow records, additional station data <br /> <br /> <br />were requested when stations were added to the original list. <br /> <br />36 <br />