CAN/CGSB-157.3-M91

This National Standard of Canada is based on International Standard ISO 1100-1:1981. 1.1 The standard gives requirements and recommendations concerning the establishment and operation of a gauging station on a lake, reservoir, river or artificial open channel for the measurement of stage or discharge or both. It is based on the International Standard ISO 1100/1, having the same title. An asterisk (*) is used to indicate those sections that differ from ISO 1100/1. 1.2 The requirements for a stage-measuring station are set out in section 5. The requirements for a discharge-measuring station are classified under two headings: a. Individual measurements - These include methods suitable for a single measurement of discharge or a limited number of measurements often used to calibrate a station. b. Regular measurements - These include methods suitable for relatively frequent measurements often made over many years.