SELECTION OF SITE FOR DISCHARGE MEASUREMENT
Following points should be considered while choosing site for measurement of discharge.
A. For Canal
- The canal should be straight for at least 10 times the width of the canal.
- The canal should be in its true section. If possible the bed and the bank slopes should the pitched so as to maintain a true design section.
- The site should be away from the bridge, fall, or regular, as flow of water at such places is not uniform.
- The canal should neither be scouring nor silting atthe point i.e. the canal should be in regime condition.
B. For Rivers
- The river should be straight for substantial length both at downstream and upstream of the site.
- The river section should be neither too narrow nor too wide.
- The river section should neither be silting nor scouring.
- The velocity of flow in the river should be laminar and not turbulent.
- The river should flow in one stream only.
- The site should be away from dam, weir or barrage.
- Other small streams and tributaries should not be meeting the main river in the vicinity of the site.