BS ISO 9825:2005 PDF

This International Standard deals specifically with the measurement of discharge in large rivers and the measurement of rivers in flood. It also describes the relevant field measurements when it becomes necessary to use indirect methods of estimating discharge. It supersedes BS 3680-3M:1990, which is withdrawn. Contents Foreword 1. Scope 2. Normative references 3. Terms and definitions 4. Units of measurement 5. Appropriate techniques 6. Nature of difficulties likely to be encountered     a. Measured parameters     b. Logistical problems 7. Measurement of discharge in large rivers     a. Problems of scale      b. Current-meter method      c. Moving-boat technique     d. Acoustic Doppler method     e. Other methods 8. Measurement of flood flows up to bankfull stage      a. Problems of flood-flow measurement     b. Use of floats     c. Moving-boat technique     d. Acoustic Doppler method      e. Radar      f. Weirs     g. Tracer dilution methods      h. Indirect methods 9. Meas...