F.3 Summary of Discharge Measurements AQU-05 Form
Notes and records obtained in the field are the basis of the office computation of hydrometric survey data. It is essential that all data be identified at every step in the computation process. Once the daily gauge heights have been determined the Summary of Discharge Measurements Form AQU-05 must be completed for all discharge measurements obtained during the year.
An example is shown in Form AQU-05 (Figure F-7). The steps for completing this form are as follows:
(a) Enter the date of the discharge measurement. If a non-conventional technique, such as 1/4 point velocity culvert etc., was used in measuring the discharge, indicate the method of measurement in the "Remarks" column.
(b) Enter the name of the person and/or the organization who made the measurement, as appropriate.
(c) Enter the water temperature as obtained at the time of the measurement (this is particularly important when water temperature is near freezing).
(d) Enter the width, area, mean velocity and discharge, using 3 significant figures. If ice is present in the stream, or if the discharge is estimated, insert the appropriate reference or symbol in the "Remarks" column.
(e) Extract the weighted mean gauge observation corresponding to the measured discharge from the notes on the front sheet of the Discharge Measurement Form (Form AQU-03, Figures F-8a and F-8b). Apply the appropriate gauge correction from History of Gauge Levels (Form AQU-04, Figure F-9) to this observation and enter the result in the "Mean Gauge Height" column. If there are unusual conditions affecting the stage-discharge relation, such as inflow between the gauge and the measuring section, note this in the "Remarks" column. Gauge height must be recorded to 3 decimals (e.g., 1.342 m).
(f) If discharge measurements at a station are made at more than one location, a symbol should be entered under "Remarks" to distinguish them in the event that it is necessary to use the cross sectional area or the mean velocity.
(g) If any other information pertinent to the discharge measurement is obtained, note this in the "Remarks" column.
Figure F-7. Example of completed RIC Form AQU-05, Summary of Discharge Measurements for the Year _____.
Figure F-8a. Example of completed RIC Form AQU-03, Discharge Measurement (front).
Figure F-8b. Example of completed RIC Form AQU-03, Discharge Measurement (back).
Figure F-9. Example of completed RIC Form AQU-04, History of Gauge Level.
